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• server 2008 r2 - wbadmin systemstatebackup - system writer not found in the backup

  - by TWood

  I am trying to manually run a systemstatebackup command on my server 2008 r2 box and I am getting an error code '2155347997' when I view the backup event log details. The command line tells me that I have log files written to the c:\windows\logs\windowsserverbackup\ path but I have no files of the .log type there. My command window tells me "System Writer is not found in the backup". However when I run vssadmin list writers I find System Writer in the list and it shows normal status with no last errors stored. I am running this from an elevated command prompt as well as from a logged on administrator account. My backup target path has permission for network service to have full control and it has plenty of free space. Looking in eventlog I have two VSS error 8194 that happen immediately before the Backup error 517 which has the errorcode 2155347997 listed. All three of these errors are a result of trying to run the command for the systemstatebackup. It's my belief that some VSS related permission is failing and exiting the backup process before it ever gets started. Because of this the initial code that creates the log files must not be running and this is why I have no files. When running the systemstatebackup command from the command prompt and watching the windowsserverbackup directory I do see that I have a Wbadmin.0.etl file which gets created but it is deleted when the backup errors out and stops. I have looked online and there are numerous opinions as to the cause of this error. These are the things I have corrected to try and fix this issue before posting here: Machine runs a HP 1410i smart array controller but at one time also used a LSI scsi card. Used networkadminkb.com's kb# a467 to find one LSI_SCSI entry in HKLMSysCurrentControlSetServices which start was set to 0x0 and I modified to 0x3. No changes. In HKLMSystemCurrentControlSetServicesVSSDiag I gave network service full control where it previously only had "Special Permission". No changes. I followed KB2009272 to manually try to fix system writer. These are all of the things I have tried. What else should I look at to resolve this issue? It may be important to note that I run Mozy Pro on this server and that was known in the past to use VSS for copying operations and it occasionally threw an error. However since an update last year those error event log entries have stopped.

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• Ubuntu Server 12.04 CPU Load

  - by zertux

  I have a Server (2x Hexa-Core Xeon E5649 2.53GHz w/HT with 32GB RAM and 20000 GB Bandwidth) running Ubuntu Server 12.04 LTS. The server runs LAMP and serves one website only, the estimated number of users is to be ~ 15,000 at the same time. At the moment i have around 2000 users online each of them runs 50 MySQL queries (small values mostly select and insert) from the beginning until the end of the session. Server CPU Load is high at this number of connections while the RAM usage is almost 1GB out of 32GB its worth mentioning that the server was running very fast with no problems at all but am concerned about the load average. http://s12.postimage.org/z7hi6mz3h/photo.png top - 03:02:43 up 9 min, 2 users, load average: 50.83, 30.14, 12.83 Tasks: 432 total, 1 running, 430 sleeping, 0 stopped, 1 zombie Cpu(s): 0.1%us, 0.2%sy, 0.0%ni, 66.5%id, 33.1%wa, 0.0%hi, 0.0%si, 0.0%st Mem: 32939992k total, 3111604k used, 29828388k free, 84108k buffers Swap: 2048280k total, 0k used, 2048280k free, 1621640k cached PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 2860 root 20 0 25820 2288 1420 S 3 0.0 0:11.18 htop 1182 root 20 0 0 0 0 D 2 0.0 0:01.46 kjournald 1935 mysql 20 0 12.3g 161m 7924 S 1 0.5 102:31.45 mysqld 11 root 20 0 0 0 0 S 0 0.0 0:00.38 kworker/0:1 1822 www-data 20 0 247m 25m 4188 D 0 0.1 0:01.81 apache2 2920 www-data 20 0 0 0 0 Z 0 0.0 0:01.20 apache2 <defunct> 2942 www-data 20 0 247m 23m 3056 D 0 0.1 0:00.20 apache2 3516 www-data 20 0 247m 23m 3028 D 0 0.1 0:00.06 apache2 3521 www-data 20 0 247m 23m 3020 D 0 0.1 0:00.09 apache2 3664 www-data 20 0 247m 23m 3132 D 0 0.1 0:00.09 apache2 3674 www-data 20 0 247m 23m 3252 D 0 0.1 0:00.06 apache2 3713 www-data 20 0 247m 23m 3040 D 0 0.1 0:00.09 apache2 1 root 20 0 24328 2284 1344 S 0 0.0 0:03.09 init 2 root 20 0 0 0 0 S 0 0.0 0:00.00 kthreadd 3 root 20 0 0 0 0 S 0 0.0 0:00.01 ksoftirqd/0 6 root RT 0 0 0 0 S 0 0.0 0:00.00 migration/0 7 root RT 0 0 0 0 S 0 0.0 0:00.00 watchdog/0 8 root RT 0 0 0 0 S 0 0.0 0:00.00 migration/1 9 root 20 0 0 0 0 S 0 0.0 0:00.00 kworker/1:0 root@server:~/codes# vmstat 1 procs -----------memory---------- ---swap-- -----io---- -system-- ----cpu---- r b swpd free buff cache si so bi bo in cs us sy id wa 19 0 0 29684012 86112 1689844 0 0 19 590 254 231 48 0 47 5 23 0 0 29704812 86128 1697672 0 0 4 320 11100 8121 77 1 22 0 33 0 0 29671044 86156 1705308 0 0 0 5440 13190 9140 95 1 4 0 33 3 0 29670088 86160 1706288 0 0 0 32932 12275 7297 99 0 1 0 35 0 0 29693456 86188 1710724 0 0 4 676 12701 7867 98 1 1 0 ^C I have not changed any of the default configurations that comes with Ubuntu. Is this load normal for such powerful server ? is there any optimization i can make to Apache/MySQL to minimize the load ? What do you recommend ?

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• Laptop turning off when fan is spinning hard

  - by Ieyasu Sawada

  My laptop seems to have reach its lifespan. Its an Acer laptop so I guess that's normal. But I'd like to hear your opinions about this. My laptop is only 2 years old. I haven't heard the fan spinning like crazy not until these past 5 months. What I did: Hoping that its just the applications that I have installed that's consume the life of my laptop from the background. I used PC Decrapifier to uninstall some of the things that I don't need. Reformatted my computer but only the primary partition since my files are on the second partition. Bought a cooling pad. None of these works. I noticed the fan spins so hard when: I have a lot of browser tabs open. Full screen mode a flash video that I'm viewing online. Using VLC to watch encoded videos. There's this thing called minicoder http://sourceforge.net/projects/minicoder/ to reduce the size of videos without affecting much of the quality. I'm suspecting that it needs additional software(to make life easier for the hardware) even though the video is working fine in VLC. VLC consumes about 300,000K and above(as seen from task manager) while watching videos (.mkv). The problem: Laptop suddenly turns off when the fan spins like crazy for about 20 minutes. I'm always checking to see if its already too hot(using my fingers to feel the side of the laptop) but its not so I continued watching and then poof! computer turns off. Laptop won't turn on immediately when I turn it on after it turning off by itself. The light for the power goes on but its turns off immediately. I have to wait for about 10-20 seconds before it boots up without problems. So how do I go about this? Is this just normal for Acer laptops after about 2 years of heavy usage (8-12 hours a day)? My usage is heavy but I normally only have a text-editor(sublime) and browser open(chrome). Here's what I got from HW monitor:

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• UPS vs Solar Power in case of power failure for a server [on hold]

  - by Zen 8000k

  I am looking for a low power, low end pc able to run 24/7 without overheating and a way to support it in case of power failure. Power failures can be up to 72 hours. The pc dosen't need a monitor or keyboard. A modem must also be protected in case of power failure. When i say low end, i don't mean crap. The cpu needs to be x86 and have at least 1k cpu in this chart: http://www.cpubenchmark.net/index.php What's the best way to do this? EDIT: more info. I need to run a home server. The server will perform light tasks mainly. A x86 cpu sadly is the only route for my use. I want to be able to run the server and the router/modem in case of power failure. Now, regarding how long the power will fail: 1) 1 hours is OK for most situations. (say 90%) 2) 3 hours is OK (say 98%) 3) 6 hours is more thank OK. (say 99.5%) 4) On extreme cases the power might fail days. I believe this is very unlikely to happen. More is great but, really, how ofter power will fail more than 3 hours? I believe once every year at best. Well, that's too rare to care about. Given the above, I am looking for a cost effective way to archive 1-3 hour power or 6 hour if possible. Solutions: You guys give me great ideas. 1) Power generator: no good as power will fail for 10 seconds before returning. Also I read online, "clean" power generators cost 1.5k+, so it's out of budged. Non clean generator might damage electronics, right? 2) Solar power: i don't know for sure about this. Sounds like a great idea, too good to be true, honestly. For only 200$ i get 100+w? What are the drawbacks here? 3) UPS: This seems to be the best. The only problem is the cost. Cost < 200$ = great 400$ = budged limit

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• Real-time offline folder-to-folder backup application needed (Windows)

  - by niktech

  I recently started using Intel Matrix Storage RAID solution that allowed me to use my 5 1TB drives for two RAID volumes. First one a 1TB RAID 0 striped across all 5 drives and second one a RAID 5 across the rest of the free space on all drives (around 2.85TB usable space). The RAID 0 I use for OS, applications and games while the RAID 5 I use as a more-permanent type storage (photos, etc). Now I do realize that running the OS and applications on RAID 0 across 5 drives is very dangerous, which is what brings up the following question. Is there a reliable freeware realtime backup application that can backup a set of folders from one drive to another drive (no online backups needed)? I've already tried a few (Mozy, Yadis, Comodo Backup, GFI Backup, Idoo, Crash Plan) but none meet my requirements: Low CPU and RAM usage. Realtime Backups - as soon as a file is modified in the source folder, it is added to the backup queue which will be processed with the lowest priority when the CPU is idle. This backup queue should persist in cases of computer restarts (ie: the source and destination folders should always have the same set of files, except for the ones waiting in the backup queue). Incremental Backups - if only 10 bytes changed in a 1GB file, the app should only copy those 10 new bytes. Ability to back up locked and opened files (some apps, like Yadis, can't back up critical files like browser favorites). Ability to run as a service (no need for any user to log-in to have the app started). Optional requirements: Compression of the destination into a well-known format (RAR, Zip) that can be directly read without the use of the application. Preset source folders (such as Browser Favorites, Game Saves, Application Settings, etc). The idea is to use RAID 0 array as "semi-persistent RAM-like" storage which in case of a failure can be quickly rebuilt by reinstalling the OS, apps and games and copying over the settings, saves, favorites from the RAID 5. I'm also thinking of taking this RAID 0 as RAM idea to the extreme with SSDs (as soon as we get some nice 6Gb/s SATA III SSDs out there), where a couple of SSDs chained in RAID 0 will work as yet another semi-persistent cache layer sitting between the RAM and the HD. I'm just hoping there already exists an application that satisfies these requirements... otherwise I'll have to write one myself, which I would prefer not to do.

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• Possible capacitor plague - need help identifying

  - by cornjuliox

  I've been having some PC power issues lately, and I think I've tracked it down to a bad power supply. Lately, when I'm on my PC it will often restart without warning, displaying "Hypertransport sync flood error occurred last boot." once POST finishes. I've googled the error, but can't come to a definitive conclusion as to what's causing it. I've seen posts suggesting that it might be a power supply issue, but nothing conclusive. Here's what I've done so far: -I haven't installed anything suspect within the last 3 months. -I do overclock just a tiny bit, so I tried raising the voltages a little. That didn't work so I brought both CPU multiplier and voltages all back to their default settings, but that didn't solve the problem either. The problem still occurs. -AV scanned the whole system, nothing suspect. -I suspected that it might be a bad power supply so I cracked that open and found the following: I think it might be cap plague, but I'm not sure. It looks more like glue TBH. Could someone help me figure out what might be wrong with this PC? EDIT: Sometimes, after these restarts, I noticed that the GPU fan doesn't spin up, and the single rear case fan that just happens to be connected to the same molex Y-cable as the GFX card doesn't spin up either. Anything to that? EDIT 2: I do use the system quite heavily, but I don't know how that will factor into this. I often play Diablo 3 and EVE Online at the same time, frequently alt-tabbing between the two. I also have Firefox open in the background, sometimes with several tabs, and if I feel like it, I'll mute the in-game sound and open foobar2000 for better music. Could it be that I'm just pushing this thing too hard? EDIT 3: I also noticed something odd. Right before I experience these restarts, my monitor would suffer from very faint lines of static moving across the screen. The monitor is still very much useable, but it is very annoying. Following the restart it disappears, and then would gradually re-appear over the next few days, and then restarts again. I find it to be very odd. System specs for good measure: Orion 600 W PSU AMD Athlon II X3 440 (overclocked to 3.14 ghZ, raised the CPU multiplier to x13 from x10) MSI G40-775 motherboard 1 GB inno3D GTX 550 ti 4 GB DDR3 RAM 500 GB Samsung SATA HD

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• networked storage for a research group, 10-100 TB

  - by Marc

  this is related to this post: http://serverfault.com/questions/80854/scalable-24-tb-nas-for-research-department but perhaps a little more general. Background: We're a research lab of around 10 people who do a lot of experiments that involve taking pictures at one of several lab setups and then analyzing it an one of several lab computers. Each experiment may produce 2 or 3 GB of data, and we are generating data at the rate of about 10 TB/year. Right now, we are storing the data on a 6-bay netgear readynas pro, but even with 2 TB drive, this only gives us 10 TB of storage. Also, right now we are not backing up at all. Our short term backup plan is to get a second readynas, put it in a different building and mirror the one drive onto the other. Obviously, this is somewhat non-ideal. Our options: 1) We can pay our university $400/ TB /year for "backed up" online storage. We trust them more than we trust us, but not a whole lot. 2) We can continue to buy small NASs and mirror them between offices. One limit, although stupid, is that we don't have an unlimited number of ethernet jacks. 3) We can try to implement our own data storage solution, which is why I'm asking you guys. One thing to consider is that we're a very transient population and none of us are network administration experts. I will probably be here only another year or so, and graduate students, who are here the longest, have a 5-6 year time scale. So nothing can require expert oversight. Our data transfer rates are low - most of the data will just sit on the server waiting for someone to look at it once or twice - so we don't need a really high speed system. Given these contraints, can someone recommend a fairly low-cost, scalable, more or less turn key shared data storage system with backup in a separate physical location. Does such a thing exist or should we just pay the university to take care of it for us? As a second question, our professor just got tenure and is putting together a budget. Here the goal is to ask for as much as you can and hope you get a fraction of it. So the same question, minus the low-cost. Without budget constraints, can you recommend a scalable turn-key backed up storage system. Thanks

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• Unable to load type error in ASP.NET 4 application on Windows Server 2003 / IIS6 -- only happens after first worker process recycle

  - by Daniel Coffman

  I'm running an ASP.NET 4.0 web application on IIS6 (Windows Server 2003 x64). This app is one of many running on this server under the Default Web Site -- but is alone on it's own application pool because the other sites are all running ASP.NET 2.0 still. When I deploy my application, it works just fine until the application pool recycles or kills its worker process (by default 2 hours or 20 minutes with no activity). After this, I get the error: "Unable to load one or more of the requested types. Retrieve the LoaderExceptions property for more information. System.Reflection.ReflectionTypeLoadException: Unable to load one or more of the requested types. Retrieve the LoaderExceptions property for more information." Refreshing the page, recycling the application pool, and iisreset do nothing. But, I can bring the site back online again for a little while by simply redeploying it. The stack trace seems to start at an EntityDataSource -- see below: [ReflectionTypeLoadException: Unable to load one or more of the requested types. Retrieve the LoaderExceptions property for more information.] System.Reflection.RuntimeModule.GetTypes(RuntimeModule module) +0 System.Reflection.Assembly.GetTypes() +144 System.Data.Metadata.Edm.ObjectItemConventionAssemblyLoader.LoadTypesFromAssembly() +45 System.Data.Metadata.Edm.ObjectItemAssemblyLoader.Load() +34 System.Data.Metadata.Edm.AssemblyCache.LoadAssembly(Assembly assembly, Boolean loadReferencedAssemblies, ObjectItemLoadingSessionData loadingData) +130 System.Data.Metadata.Edm.AssemblyCache.LoadAssembly(Assembly assembly, Boolean loadReferencedAssemblies, KnownAssembliesSet knownAssemblies, EdmItemCollection edmItemCollection, Action`1 logLoadMessage, Object& loaderCookie, Dictionary`2& typesInLoading, List`1& errors) +248 System.Data.Metadata.Edm.ObjectItemCollection.LoadAssemblyFromCache(ObjectItemCollection objectItemCollection, Assembly assembly, Boolean loadReferencedAssemblies, EdmItemCollection edmItemCollection, Action`1 logLoadMessage) +580 System.Data.Metadata.Edm.ObjectItemCollection.ExplicitLoadFromAssembly(Assembly assembly, EdmItemCollection edmItemCollection, Action`1 logLoadMessage) +193 System.Data.Metadata.Edm.MetadataWorkspace.ExplicitLoadFromAssembly(Assembly assembly, ObjectItemCollection collection, Action`1 logLoadMessage) +140 System.Web.UI.WebControls.EntityDataSourceView.ConstructContext() +756 System.Web.UI.WebControls.EntityDataSourceView.ExecuteSelect(DataSourceSelectArguments arguments) +147 This is a bug filed for the same (or similar) problem: http://connect.microsoft.com/VisualStudio/feedback/details/541962/unable-to-load-one-or-more-of-the-requested-types-connected-with-entitydatasource Question: Has anyone seen this and have advice? I've tried copy-local on all the references... Works just fine on my dev machine. Works on the server until the application pool worker process recycles. I'm building in release mode, but experience the same result when I build for debug. I'm stumped.

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• Can't get my Raspberry Pi to keep a static IP

  - by JonnyIrving

  I recently got given a Raspberry Pi and I would like to be able to remote into it using puTTy from my laptop so I don't have to sit next to my tv with a keyboard and mouse to use it. I am able to get a puTTy session going when I know the IP address that my router has given the Pi on each session but it keeps changing on each reboot as I would expect. So I followed a number if instruction to go about configuring the RPi to keep a static IP address. This involved changing the file at '/etc/netwrok/interfaces' which now contains (password removed): auto lo iface lo inet loopback iface eth0 inet static address 192.168.1.82 netmask 255.255.255.0 gateway 192.168.1.254 auto wlan0 allow-hotplug wlan0 iface wlan0 inet dhcp wpa-ssid "BeBoxD304BF" wpa-psk "**********" Despite this however, each time I reboot my RPi it gives me a new dynamic IP address still. I also noticed that in the 'ifconfig' output below that the details of the eth0 doesn't contain IP details for inet addr, Bcast or Mask which have been present in all other examples I have seen online. eth0 Link encap:Ethernet HWaddr b8:27:eb:b5:95:da UP BROADCAST MULTICAST MTU:1500 Metric:1 RX packets:0 errors:0 dropped:0 overruns:0 frame:0 TX packets:0 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:0 (0.0 B) TX bytes:0 (0.0 B) lo Link encap:Local Loopback inet addr:127.0.0.1 Mask:255.0.0.0 UP LOOPBACK RUNNING MTU:16436 Metric:1 RX packets:0 errors:0 dropped:0 overruns:0 frame:0 TX packets:0 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:0 (0.0 B) TX bytes:0 (0.0 B) wlan0 Link encap:Ethernet HWaddr 00:87:c6:00:33:77 inet addr:192.168.1.83 Bcast:192.168.1.255 Mask:255.255.255.0 UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:918 errors:0 dropped:0 overruns:0 frame:0 TX packets:277 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 Also I'm not sure if this is relevant but it can't hurt! The file at '/etc/resolv.conf' contains: domain config search config nameserver 192.168.1.254 ..I heard it might mean something on one of the pages I was looking at. I would be very grateful for any help with this. I have tried everything I can think of and would really like to get this working this weekend so I can use it from work.

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• How can I change how OS X's 'say' command pronounces a word?

  - by jwhitlock

  OS X's say command is useful for some tasks (such as Skype's 'notify me when a contact comes online), but it is pronouncing some names incorrectly. Is there a way to teach say to pronounce a word differently? For example, try: say "Hi, Joel Spolsky" The 'ol' sounds like 'ball' rather than 'old'. I'd like to add an exception that say "Pronounce Spolsky like this", rather than try to teach new linguistic rules. I bet there is a way since it can pronounce "iphone" as Apple wants. Update - After some research, here's what I've learned: Text-to-speech is split between turning the text to phonemes, and then the phonemes are turned into audio using a voice. Changing the voice doesn't effect the phonemes. The Speech Synthesis Manager has some functions for turning text to phonemes, and a method for registering a speech dictionary that will add new text-phoneme maps. However, Apple's speech dictionary must be in a binary form - I didn't find any plist XML. Using dtrace while running say, I found some interesting files opened in /System/Library/PrivateFrameworks/SpeechDictionary.framework/Resources. This is probably the speech dictionary, but they are all binary, except for Homophones, which is XML. Adding entries to Homophones does nothing - it is probably used in speech-to-text. They are also code signed by Apple - changing them may prevent some programs from working. PrefixDictionary CartNames CartLite SymbolDictionary Homophones There are ways to add text versions of application interface elements so VoiceOver works, a lot of which a developer gets for free, but there are tricky bits. The standard here appears to be to use a phonetic spelling as needed. My guesses are: say is a light layer of code on top of the Speech Synthesis Manager. It would be easy for the Apple devs to add a command line option to take the path to a speech dictionary plist for alternate phoneme mapping, but they didn't. It may be a useful open-source project to write a better say. Skype probably uses Speech Synthesis Manager directly, leaving no hooks to change the way my friend's names are pronounced, other than spelling them phonetically, which is silly. The easiest way to make a command line version of say is how JRobert suggested. Here's my quick implementation, using Doug Harris's spelling suggestion: #!/bin/sh echo $@ | tr '[A-Z]' '[a-z]' | sed "s/spolsky/spowlsky/g" | /usr/bin/say Finally, some fun command line stuff: # Apple is weird sqlite3 /System/Library/PrivateFrameworks/SpeechDictionary.framework/Resources/Tuples .dump # Get too much information about what files are being opened sudo dtrace -n 'syscall::open*:entry { printf("%s %s",execname,copyinstr(arg0)); }' # Just fun say -v bad "Joel Spolsky Spolsky Spolsky Spolsky Spolsky, Joel Spolsky Spolsky Spolsky Spolsky Spolsky" echo "scale=1000; 4*a(1)" | bc -l | say

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• Firefox can't establish a connection to the server at www.google.com

  - by Tom

  My home page in Firefox [v4.0] and Internet Explorer [v9.0.8112.16421, Update Versions RTM (KB982861)] is currently set to Google but when I depress the quick start icon to start up either browser, I am getting the following immediate results: Unable to connect (In Firefox) Firefox can't establish a connection to the server at www.google.com. The site could be temporarily unavailable or too busy. Try again in a few moments. If you are unable to load any pages, check your computer's network connection. If your computer or network is protected by a firewall or proxy, make sure that Firefox is permitted to access the Web. Internet Explorer cannot display the webpage What you can try: Diagnose Connection Problems More information This problem can be caused by a variety of issues, including: Internet connectivity has been lost. The website is temporarily unavailable. The Domain Name Server (DNS) is not reachable. The Domain Name Server (DNS) does not have a listing for the website's domain. There might be a typing error in the address. If this is an HTTPS (secure) address, click Tools, click Internet Options, click Advanced, and check to be sure the SSL and TLS protocols are enabled under the security section. For offline users You can still view subscribed feeds and some recently viewed webpages. To view subscribed feeds: Click the Favorites button , click Feeds, and then click the feed you want to view. To view recently visited webpages (might not work on all pages): Press Alt, click File, and then click Work Offline. Click the Favorites button, click History, and then click the page you want to view. Thankfully, I am able to use one browser that I have installed on my computer (Mathon v3.0.20.5000) to search online for technical assistance in this matter. I have seen several WinSock error issues mentioned; but, they are pointing to Windows XP and I am using Windows 7 Pro and remain uncertain whether anything identified as a fix for one OS will work in another. Things I've tried: HiJackThis Complete scan with Avira AntiVirus Premium. What am I overlooking? What should I do to address this problem?

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• Excessive Outbound DNS Traffic

  - by user1318414

  I have a VPS system which I have had for 3 years on one host without issue. Recently, the host started sending an extreme amount of outbound DNS traffic to 31.193.132.138. Due to the way that Linode responded to this, I have recently left Linode and moved to 6sync. The server was completely rebuilt on 6sync with the exception of postfix mail configurations. Currently, the daemons run are as follows: sshd nginx postfix dovecot php5-fpm (localhost only) spampd (localhost only) clamsmtpd (localhost only) Given that the server was 100% rebuilt, I can't find any serious exploits against the above stated daemons, passwords have changed, ssh keys don't even exist on the rebuild yet, etc... it seems extremely unlikely that this is a compromise which is being used to DoS the address. The provided IP is noted online as a known SPAM source. My initial assumption was that it was attempting to use my postfix server as a relay, and the bogus addresses it was providing were domains with that IP registered as their nameservers. I would imagine given my postfix configuration that DNS queries for things such as SPF information would come in with equal or greater amount than the number of attempted spam e-mails sent. Both Linode and 6Sync have said that the outbound traffic is extremely disproportionate. The following is all the information I received from Linode regarding the outbound traffic: 21:28:28.647263 IP 97.107.134.33.32775 > 31.193.132.138.53: 28720 op8+% [b2&3=0x4134] [17267a] [30550q] [28773n] [14673au][|domain] 21:28:28.647264 IP 97.107.134.33 > 31.193.132.138: udp 21:28:28.647264 IP 97.107.134.33.32775 > 31.193.132.138.53: 28720 op8+% [b2&3=0x4134] [17267a] [30550q] [28773n] [14673au][|domain] 21:28:28.647265 IP 97.107.134.33 > 31.193.132.138: udp 21:28:28.647265 IP 97.107.134.33.32775 > 31.193.132.138.53: 28720 op8+% [b2&3=0x4134] [17267a] [30550q] [28773n] [14673au][|domain] 21:28:28.647266 IP 97.107.134.33 > 31.193.132.138: udp 6sync cannot confirm whether or not the recent spike in outbound traffic was to the same IP or over DNS, but I have presumed as such. For now my server is blocking the entire 31.0.0.0/8 subnet to help deter this while I figure it out. Anyone have any idea what is going on?

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• Keep source IP after NAT

  - by John Miller

  Until today I used a cheapy router so I can share my internet connection and keep a webserver online too, while using NAT. Users IP ($_SERVER['REMOTE_ADDR']) was fine, I was seeing class A IPs of users. But as traffic grown up everyday, I had to install a Linux Server (Debian) to share my Internet Connection, because my old router couldn't keep the traffic anymore. I shared the internet via IPTABLES using NAT, but now, after forwarding port 80 to my webserver, now instead of seeing real users IP, I see my Gateway IP (Linux Internal IP) as any user IP Address. How to solve this issue? I edited my post, so I can paste the rules I'm currently using. #!/bin/sh #I made a script to set the rules #I flush everything here. iptables --flush iptables --table nat --flush iptables --delete-chain iptables --table nat --delete-chain iptables -F iptables -X # I drop everything as a general rule, but this is disabled under testing # iptables -P INPUT DROP # iptables -P OUTPUT DROP # these are the loopback rules iptables -A INPUT -i lo -j ACCEPT iptables -A OUTPUT -o lo -j ACCEPT # here I set the SSH port rules, so I can connect to my server iptables -A INPUT -p tcp --sport 513:65535 --dport 22 -m state --state NEW,ESTABLISHED -j ACCEPT iptables -A OUTPUT -p tcp --sport 22 --dport 513:65535 -m state --state ESTABLISHED -j ACCEPT # These are the forwards for 80 port iptables -t nat -A PREROUTING -p tcp -s 0/0 -d xx.xx.xx.xx --dport 80 -j DNAT --to 192.168.42.3:80 iptables -t nat -A POSTROUTING -o eth0 -d xx.xx.xx.xx -j SNAT --to-source 192.168.42.3 iptables -A FORWARD -p tcp -s 192.168.42.3 --sport 80 -j ACCEPT # These are the forwards for bind/dns iptables -t nat -A PREROUTING -p udp -s 0/0 -d xx.xx.xx.xx --dport 53 -j DNAT --to 192.168.42.3:53 iptables -t nat -A POSTROUTING -o eth0 -d xx.xx.xx.xx -j SNAT --to-source 192.168.42.3 iptables -A FORWARD -p udp -s 192.168.42.3 --sport 53 -j ACCEPT # And these are the rules so I can share my internet connection iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE iptables -A FORWARD -i eth0:1 -j ACCEPT If I delete the MASQUERADE part, I see my real IP while echoing it with PHP, but I don't have internet. How to do, to have internet and see my real IP while ports are forwarded too? ** xx.xx.xx.xx - is my public IP. I hid it for security reasons.

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• Linux filesystem with inodes close on the disk

  - by pts

  I'd like to make the ls -laR /media/myfs on Linux as fast as possible. I'll have 1 million files on the filesystem, 2TB of total file size, and some directories containing as much as 10000 files. Which filesystem should I use and how should I configure it? As far as I understand, the reason why ls -laR is slow because it has to stat(2) each inode (i.e. 1 million stat(2)s), and since inodes are distributed randomly on the disk, each stat(2) needs one disk seek. Here are some solutions I had in mind, none of which I am satisfied with: Create the filesystem on an SSD, because the seek operations on SSDs are fast. This wouldn't work, because a 2TB SSD doesn't exist, or it's prohibitively expensive. Create a filesystem which spans on two block devices: an SSD and a disk; the disk contains file data, and the SSD contains all the metadata (including directory entries, inodes and POSIX extended attributes). Is there a filesystem which supports this? Would it survive a system crash (power outage)? Use find /media/myfs on ext2, ext3 or ext4, instead of ls -laR /media/myfs, because the former can the advantage of the d_type field (see in the getdents(2) man page), so it doesn't have to stat. Unfortunately, this doesn't meet my requirements, because I need all file sizes as well, which find /media/myfs doesn't print. Use a filesystem, such as VFAT, which stores inodes in the directory entries. I'd love this one, but VFAT is not reliable and flexible enough for me, and I don't know of any other filesystem which does that. Do you? Of course, storing inodes in the directory entries wouldn't work for files with a link count more than 1, but that's not a problem since I have only a few dozen such files in my use case. Adjust some settings in /proc or sysctl so that inodes are locked to system memory forever. This would not speed up the first ls -laR /media/myfs, but it would make all subsequent invocations amazingly fast. How can I do this? I don't like this idea, because it doesn't speed up the first invocation, which currently takes 30 minutes. Also I'd like to lock the POSIX extended attributes in memory as well. What do I have to do for that? Use a filesystem which has an online defragmentation tool, which can be instructed to relocate inodes to the the beginning of the block device. Once the relocation is done, I can run dd if=/dev/sdb of=/dev/null bs=1M count=256 to get the beginning of the block device fetched to the kernel in-memory cache without seeking, and then the stat(2) operations would be fast, because they read from the cache. Is there a way to lock those inodes and/or blocks into memory once they have been read? Which filesystem has such a defragmentation tool?

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• Routing all data through an VPN tunnel with ppp

  - by Oliver

  I'm trying to create a VPN tunnel that forwards all data from the local machine to the VPN server. I'm using ppp-2.4.5 for this with the following configuration: pty "pptp <VPNServer> --nolaunchpppd" name <my login name> remotename PPTP usepeerdns require-mppe-128 file /etc/ppp/options.pptp persist maxfail 0 holdoff 5 I have a script in if-up.d with the following content: route del default eth0 route add default dev ppp0 Before starting the VPN tunnel my routing looks like: Kernel IP routing table Destination Gateway Genmask Flags Metric Ref Use Iface 0.0.0.0 192.168.0.1 0.0.0.0 UG 2 0 0 eth0 127.0.0.0 127.0.0.1 255.0.0.0 UG 0 0 0 lo 192.168.0.0 0.0.0.0 255.255.0.0 U 0 0 0 eth0 After starting the tunnel (via pon) it looks like: Kernel IP routing table Destination Gateway Genmask Flags Metric Ref Use Iface 0.0.0.0 0.0.0.0 0.0.0.0 U 0 0 0 ppp0 12.34.56.1 0.0.0.0 255.255.255.255 UH 0 0 0 ppp0 127.0.0.0 127.0.0.1 255.0.0.0 UG 0 0 0 lo 192.168.0.0 0.0.0.0 255.255.0.0 U 0 0 0 eth0 Now the problem is, that the VPN tunnel seems to be looped into itself. If I run ifconfig after a few seconds without any traffic: eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500 inet 192.168.0.10 netmask 255.255.0.0 broadcast 192.168.255.255 ether 00:01:2e:2f:ff:35 txqueuelen 1000 (Ethernet) RX packets 39931 bytes 6784614 (6.4 MiB) RX errors 0 dropped 90 overruns 0 frame 0 TX packets 34980 bytes 7633181 (7.2 MiB) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0 device interrupt 20 memory 0xfbdc0000-fbde0000 ppp0: flags=4305<UP,POINTOPOINT,RUNNING,NOARP,MULTICAST> mtu 1496 inet 12.34.56.78 netmask 255.255.255.255 destination 12.34.56.1 ppp txqueuelen 3 (Point-to-Point Protocol) RX packets 7 bytes 94 (94.0 B) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 782863 bytes 349257986 (333.0 MiB) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0 It states that already over 300 MiB have been send, ppp0 is only online since a few seconds and the connection isn't working anyway. Can someone please help me to fix the routing table, so that the traffic from ppp0 is not send again through ppp0 but instead goes to the remote server?

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• SQL Server database filled the hard drive and freeing up space isn't possible

  - by Jon

  I have a database in SQL Server 2008 on a 1Tb hard drive and it filled the drive, there is only 4Kb free. The MDF file is 323Gb and the LDF is 653Gb. The hard disk this DB is on has no other files on it other than the MDF and LDF so it's impossible to free up any space on the drive. The main hard disk is smaller but there is enough room to transfer the MDF to that drive, in case that helps. This server is overseas at a customer site and it's not possible at the moment to add more disk space to the server. It's also not possible to delete any records because the DB is in a failed mode (due to no disk space) and it doesn't respond to most commands. The Db is currently in full recovery mode which is why the LDF file is so large. This DB really doesn't need to be in full recovery so going forward we plan on switching it to simple mode which will save us a lot of space. I also don't care about losing the LDF file, but I need all of the data. I've spent a lot of time looking for a way out of this problem but everything I've found first involves either freeing up disk space or adding more disk space, neither of which is an option at this time. I'm stuck and any help would be greatly appreciated. I get the following log when trying to switch the DB to online mode. Msg 945, Level 14, State 2, Line 3 Database 'DBNAME' cannot be opened due to inaccessible files or insufficient memory or disk space. See the SQL Server errorlog for details. Msg 5069, Level 16, State 1, Line 3 ALTER DATABASE statement failed. Msg 1101, Level 17, State 12, Line 3 Could not allocate a new page for database 'DBNAME' because of insufficient disk space in filegroup 'DEFAULT'. Create the necessary space by dropping objects in the filegroup, adding additional files to the filegroup, or setting autogrowth on for existing files in the filegroup. I've found the following solutions but none work due to having no disk space on that drive, and since the DB is in a failed state I can't run most commmands. - DBCC SHRINKFILE - can't be run because doing a 'use DBNAME' fails - Detaching the DB and then changing the location of the MDF/LDF files, this fails because the DB is in an offline mode so you can't run detach. I'm at a loss about what else to try. Thanks.

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• PHP versions warning on Plesk 11.0.9 upgrade on CentOS server

  - by Pixman

  I have a server turning on Plesk 10.4.4 and I want to upgrade it to 11.0.9. When I use the online upgrade tool, I have this warning: Parallels Panel pre-upgrade check... WARNING: You have a mixed set of 'php' and 'php53' packages installed. Installation or upgrade may fail or produce unexpected results. To resolve this issue run "sed -i.bak -e '/^\s*skip-bdb\s*$/d' /etc/my.cnf ; yum update 'php*' 'mysql*'". PHP Warning: Directive 'safe_mode' is deprecated in PHP 5.3 and greater in Unknown on line 0 I have run the code in ssh, but nothing changes. I have already searched all package names with "php", and I have this list: # yum list installed | grep php php-common.i386 5.3.13-5.el5.art installed php-pear.noarch 1:1.4.9-8.el5 installed php5-ioncube-loader.i386 4.0.7-11062118 installed php53.i386 5.3.3-13.el5_8 installed php53-cli.i386 5.3.3-13.el5_8 installed php53-devel.i386 5.3.3-13.el5_8 installed php53-gd.i386 5.3.3-13.el5_8 installed php53-imap.i386 5.3.3-13.el5_8 installed php53-mbstring.i386 5.3.3-13.el5_8 installed php53-mcrypt.i386 5.3.3-1.el5 installed php53-mysql.i386 5.3.3-13.el5_8 installed php53-pdo.i386 5.3.3-13.el5_8 installed php53-sqlite2.i386 5.3.2-11041315 installed php53-xml.i386 5.3.3-13.el5_8 installed psa-appvault-phpads.noarch 2.0.8-8203520080409011611 installed psa-appvault-phpbb.noarch 3.0.0-8200820080409011626 installed psa-appvault-phpbook.noarch 1.50-8203220080409011638 installed psa-appvault-phpbugtracker.noarch 1.19-8203820080416050605 installed psa-appvault-phpdig.noarch 1.85-8203120080409011645 installed psa-appvault-phpmoney.noarch 1.3-8204320080409011649 installed psa-appvault-phpmyfamily.noarch 1.4.1-8203420080409011655 installed psa-appvault-phpmyvisites.noarch 2.3-8202820080409011701 installed psa-appvault-phprojekt.noarch 5.2-8200820080409011713 installed psa-appvault-phpsurveyor.noarch 0.98-8204320080409011723 installed psa-appvault-phpwebsite.noarch 0.10.2-8203420080409011738 installed psa-appvault-phpwiki.noarch 1.3.11-8204320080409011808 installed psa-php53-configurator.i386 1.6.1-cos5.build1013111101.14 installed After verification in the Plesk file: panel_preupgrade_checker.php I think the warning is due to these lines: (from : panel_preupgrade_checker.php) foreach ($packages as $package) { $name = $package['name']; $hasPhp5 |= ($name == 'php' || strpos($name, 'php-') === 0); $hasPhp53 |= (strpos($name, 'php53') === 0); } Now, I think the problem is just due to the names of theses packages: php-common.i386 5.3.13-5.el5.art installed php-pear.noarch 1:1.4.9-8.el5 installed Can you help me to resolve this situation?

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• Single line diff

  - by Ollie Saunders

  Is there a diff tool I can run from the command line or maybe just an online webpage that will compare single lines? GitHub diffs do this but I'm don't want to publish things to GitHub just to read the diffs! This is the sort of thing I'm wanting to diff: a:2:{i:0;O:10:"FuTreeNode":6:{s:5:"outer";r:2;s:6:"inners";O:20:"FuLinkedTreeNodeList":2:{s:5:"outer";r:2;s:5:"items";a:0:{}}s:5:"value";s:3:"foo";s:4:"next";O:10:"FuTreeNode":6:{s:5:"outer";r:2;s:6:"inners";O:20:"FuLinkedTreeNodeList":2:{s:5:"outer";r:8;s:5:"items";a:0:{}}s:5:"value";s:3:"bar";s:4:"next";N;s:4:"prev";O:10:"FuTreeNode":6:{s:5:"outer";N;s:6:"inners";O:20:"FuLinkedTreeNodeList":2:{s:5:"outer";r:15;s:5:"items";a:0:{}}s:5:"value";s:3:"zim";s:4:"next";r:8;s:4:"prev";O:10:"FuTreeNode":6:{s:5:"outer";N;s:6:"inners";O:20:"FuLinkedTreeNodeList":2:{s:5:"outer";r:22;s:5:"items";a:0:{}}s:5:"value";s:3:"foo";s:4:"next";r:15;s:4:"prev";r:8;s:6:"ofList";O:12:"FuLinkedList":1:{s:5:"items";a:4:{i:0;r:2;i:1;r:8;i:2;r:22;i:3;r:15;}}}s:6:"ofList";r:30;}s:6:"ofList";O:20:"FuLinkedTreeNodeList":2:{s:5:"outer";r:2;s:5:"items";a:2:{i:0;r:2;i:1;r:8;}}}s:4:"prev";N;s:6:"ofList";r:37;}i:1;r:8;} a:2:{i:0;O:10:"FuTreeNode":6:{s:5:"outer";r:2;s:6:"inners";O:20:"FuLinkedTreeNodeList":2:{s:5:"outer";r:2;s:5:"items";a:0:{}}s:5:"value";s:3:"foo";s:4:"next";O:10:"FuTreeNode":6:{s:5:"outer";r:2;s:6:"inners";O:20:"FuLinkedTreeNodeList":2:{s:5:"outer";r:8;s:5:"items";a:0:{}}s:5:"value";s:3:"bar";s:4:"next";N;s:4:"prev";O:10:"FuTreeNode":6:{s:5:"outer";N;s:6:"inners";O:20:"FuLinkedTreeNodeList":2:{s:5:"outer";r:15;s:5:"items";a:0:{}}s:5:"value";s:3:"zim";s:4:"next";r:8;s:4:"prev";O:10:"FuTreeNode":6:{s:5:"outer";N;s:6:"inners";O:20:"FuLinkedTreeNodeList":2:{s:5:"outer";r:22;s:5:"items";a:0:{}}s:5:"value";s:3:"foo";s:4:"next";r:15;s:4:"prev";r:8;s:6:"ofList";O:12:"FuLinkedList":1:{s:5:"items";a:4:{i:0;r:2;i:1;r:8;i:2;r:22;i:3;r:15;}}}s:6:"ofList";r:30;}s:6:"ofList";O:20:"FuLinkedTreeNodeList":2:{s:5:"outer";r:2;s:5:"items";a:2:{i:0;r:2;i:1;r:8;}}}s:4:"prev";N;s:6:"ofList";r:37;}i:1;r:22;} I'm on Mac OS X.

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• Second HDD not seen by Windows 7 on Dell Xps l501x

  - by George

  I have a Dell XPS Laptop (l501x). I have replaced the original Seagate 500GB hard drive with an SSD Intel 320 120GB when I first purchased it a year ago. It's been working great. The laptop is booting in about 23 seconds, so the SSD is great. I have an Acronis image created that I came back to every three months just to keep everything clean. The SSD is partitioned with one logical drive for my data. So, recently I thought since I am not using my optical drive often enough to swap it out with a HDD caddy and add my seagate 500gb hard drive. I ordered the caddy placed the HDD in it and now load Windows. It just hangs on the screen that should show the Windows logo. I have tried everything that I know and searched it online. I have uninstalled the SATA controller AHCI and let Windows install it. Still will not boot into windows. I wanted to mention that the Seagate 500GB drive was the one that came with my laptop before I switched to the Intel SSD. As you know Intel has this application called Intel Rapid Technology which loads once in a while and shows the second hard drive, but then, when I restart it hangs again and Windows will not load. As soon as I remove the HDD Caddy and restart it loads Windows fine. I also formated the Seagate 500GB HDD in NTFS and still Windows will not load. When I go into the BIOS it shows the Fixed SSD and also "Sata ODD 500GB" instead of the optical drive but it will not boot into Windows when the HDD caddy is present. There is nothing wrong with the caddy. I have another laptop (Asus) and I installed the HDD caddy and Windows 7 loads without any glitch. I don't get it. I have also flashed the BIOS because Dell had a new version (A08). I also wanted to add that I refreshed Disk Management and the Device Manager and the second drive does not display. At this point I think it's a Windows issue so before I reinstall Windows 7 Home Premium from scratch I wanted to see if there was anything I was missing. Any advice would be greatly appreciated.

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• What Sort of Server Setup Am I Likely to Need? - School A/V streaming

  - by DeathMagus

  My prior experience with servers has generally been limited to home file-sharing servers, low-traffic web-servers, and the like. This leaves me with the technical knowledge of how to set up a system, but little experience in terms of scaling said system. My current project, however, has me as the technical lead in setting up a school for online audio and video streaming. The difficulty I'm running into is that I don't quite have the experience to guess what they'll need, and they don't have the experience to tell me - so I've tried to ask as many pertinent questions about what they want to do with their server, and here's what I found out: About 1000 simultaneous users, and hoping to expand (possibly significantly) Both video and audio streaming, at obviously the highest quality possible Support for both live and playlist-based streaming. Probably only one channel, but as it's an educational opportunity, I imagine letting them have a few more wouldn't hurt. No word on whether they're locked into Windows or whether Linux is acceptable. Approximate budget - $7000. It may actually be about $2k less than this, because of a mishap with another technology firm (they ordered a $7000 DV tape deck for some reason, and now the company wants them to pay a 30% restocking fee). The tentative decisions I've already made: I'm planning on using Icecast 2 for my streaming server, fed by VLC Shoutcast encoding. Since the school already has a DMZ set up, I plan on placing the Icecast server in there, and feeding it through their intranet from a simple workstation computer in their studios. This system isn't in any way mission critical - it's an education tool (they're a media magnet school), so I figure redundancy is not worthwhile to them from a cost:benefit perspective. What I don't know is this: How powerful of a server will I need? What is likely to be my major throttle - bandwidth? How can I mitigate that? Will I need anything special for the encoding workstation other than professional video and audio capture cards and a copy of VLC? Are there any other considerations that I'm simply missing? Thanks a lot for any help - if there's more information you need, let me know and I'll tell you all I can.

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• ssh client problem: Connection reset by peer

  - by yonix

  I'm having a really annoying problem on my Ubuntu laptop. I noticed it today, after upgrading to Ubuntu 11.04, although I'm not entirely sure this is the cause as I played with my ssh keys a few days ago. The problem is, whenever I try to ssh to ANY host I get the following error: Read from socket failed: Connection reset by peer running with -vvv gives the following output: OpenSSH_5.8p1 Debian-1ubuntu3, OpenSSL 0.9.8o 01 Jun 2010 debug1: Reading configuration data /etc/ssh/ssh_config debug1: Applying options for * debug2: ssh_connect: needpriv 0 debug1: Connecting to hostname [10.0.0.2] port 22. debug1: Connection established. debug1: permanently_set_uid: 0/0 debug1: identity file /root/.ssh/id_rsa type -1 debug1: identity file /root/.ssh/id_rsa-cert type -1 debug1: identity file /root/.ssh/id_dsa type -1 debug1: identity file /root/.ssh/id_dsa-cert type -1 debug1: identity file /root/.ssh/id_ecdsa type -1 debug1: identity file /root/.ssh/id_ecdsa-cert type -1 debug1: Remote protocol version 1.99, remote software version OpenSSH_4.2 debug1: match: OpenSSH_4.2 pat OpenSSH_4* debug1: Enabling compatibility mode for protocol 2.0 debug1: Local version string SSH-2.0-OpenSSH_5.8p1 Debian-1ubuntu3 debug2: fd 3 setting O_NONBLOCK debug3: load_hostkeys: loading entries for host "hostname" from file "/root/.ssh/known_hosts" debug3: load_hostkeys: loaded 0 keys debug1: SSH2_MSG_KEXINIT sent Read from socket failed: Connection reset by peer My /etc/ssh/ssh_config: Host * SendEnv LANG LC_* HashKnownHosts yes GSSAPIAuthentication no GSSAPIDelegateCredentials no I can connect to my laptop from any other server via ssh, and I can also ssh localhost from my laptop successfully. I can connect to all these other server from other laptops, and I don't see anything in the logs of the other servers regarding my failed attempt. I tried to stop iptables, didn't help. I tried several tricks I could find online with my /etc/ssh/ssh_config, but I was unsuccessful in solving the problem... Any ideas? Edit: This is the log from one of the hosts I try to connect to: May 1 19:15:23 localhost sshd[2845]: debug1: Forked child 2847. May 1 19:15:23 localhost sshd[2845]: debug3: send_rexec_state: entering fd = 8 config len 577 May 1 19:15:23 localhost sshd[2845]: debug3: ssh_msg_send: type 0 May 1 19:15:23 localhost sshd[2845]: debug3: send_rexec_state: done May 1 19:15:23 localhost sshd[2847]: debug1: rexec start in 5 out 5 newsock 5 pipe 7 sock 8 May 1 19:15:23 localhost sshd[2847]: debug1: inetd sockets after dupping: 3, 3 May 1 19:15:23 localhost sshd[2847]: Connection from 10.0.0.7 port 55747 May 1 19:15:23 localhost sshd[2847]: debug1: Client protocol version 2.0; client software version OpenSSH_5.8p1 Debian-1ubuntu3 May 1 19:15:23 localhost sshd[2847]: debug1: match: OpenSSH_5.8p1 Debian-1ubuntu3 pat OpenSSH* May 1 19:15:23 localhost sshd[2847]: debug1: Enabling compatibility mode for protocol 2.0 May 1 19:15:23 localhost sshd[2847]: debug1: Local version string SSH-2.0-OpenSSH_5.3 May 1 19:15:23 localhost sshd[2847]: debug2: fd 3 setting O_NONBLOCK May 1 19:15:23 localhost sshd[2847]: debug2: Network child is on pid 2848 May 1 19:15:23 localhost sshd[2847]: debug3: preauth child monitor started May 1 19:15:23 localhost sshd[2847]: debug3: mm_request_receive entering May 1 19:15:23 localhost sshd[2848]: debug3: privsep user:group 74:74 May 1 19:15:23 localhost sshd[2848]: debug1: permanently_set_uid: 74/74 May 1 19:15:23 localhost sshd[2848]: debug1: list_hostkey_types: ssh-rsa,ssh-dss May 1 19:15:23 localhost sshd[2848]: debug1: SSH2_MSG_KEXINIT sent May 1 19:15:23 localhost sshd[2848]: debug3: Wrote 784 bytes for a total of 805 May 1 19:15:23 localhost sshd[2848]: fatal: Read from socket failed: Connection reset by peer

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• Recovering data from failed Raid configuration with 4 drives and two raid sets (Asus P6T / Intel ICH10r)

  - by user56365

  I've added the complete detailed version for my question below for those who can help, but want to quickly summarize my question first. I setup two Raid arrays using (4) WD Raptors, a striped set for the OS and 1+0 set for crucial data. After booting once out of the 50 times a cable fell out, the drive wasn't recognized in the array anymore. After trying to fix it, another drive did the same. I now have two drives remaining, luckily with the parity information. I know the striped set is gone, but I need the data on the other set. Can anyone recommend anything to recover the data, or fix the two drives that doesn't allow the raid controller to recognize the drives, even though they are listed on the utility screen as still apart of the configuration but that they are not found? More Details I recently upgraded to a ASUS P6T motherboard with an Intel ICH10R raid controller and changed my previous 4 drive raid array from strictly a Raid 1+0 set to a Raid 0 for the OS/Page/Scratch drive and a Raid 1+0 set for crucial data. I never had problems after upgrading with my configuration, even when a drive died and was replaced. I managed to rebuild the array fine. Unfortunately this time around, a cable came unattached and I booted my system up until the raid status screen with the degraded error. This shouldn't have been a problem, but after I attached the drive it was no longer recognized as a member in the array. Both drives actually show up as a non-member disk. I've spent a very, very long time online trying to find information or support and haven't had much luck. After spending time trying to scan the drive for errors, damaged partition info, etc.. another drive in the set decided it didn't want to be recognized as a part of the array. At this point, I have two out of the four drives still functioning, but the Raid 1+0 array went from degraded to failed and I must find a way to retrieve that data. I think the two drives still in the array have the parity information because they show up as OS (110GB),BACKUP(80GB) and OS:1(110GB),BACKUP(80GB) under windows data management. The other two are simply 74gb Raw unallocated Is it possible recover the data using those two drive only, and which tool would I use? Could it be a simple partition table or any other error that is repairable with hard drive utilities out there? I know the Raid 0 set is done for, but I would assume because the correct drives failed in a 1+0 config to save the data I can retrieve it some how.

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• How can I create an appointment on a shared Outlook calendar

  - by roryhewitt

  This isn't as basic a question as it may seem. Hence all the descriptive text... I and my team use Outlook 2007. I have my own personal calendar and also I share a calendar with others in my team (which is mainly used to notify everyone of vacations etc.). The others in my team are NOT technical people. I would like to create a shortcut or template that any of us can use to create an appointment in the shared calendar. My initial though was to create a new appointment, but rather than actually put it in the calendar, I would save it as an Outlook Template (.oft) file. Once created, I would send this to my team and tell them to put it in their Templates file and put a shortcut on their desktop. Then, if they want to put a vacation in the shared calendar, they just double-click on the shortcut, change the dates etc. and then save & close it. However, when I do that, it doesn't save the fact that it's an appointment on the shared calendar - it just adds the appointment to the team member's personal calendar. There doesn't seem to be a way to specify a calendar in the template. I've also tried this by saving the template as a .ics or .vcs file, with no better luck. Additionally, if a team member adds an appointment to the shared calendar, other 'sharees' aren't notified, unless the appointment is actually created as a meeting and the other sharees are explicitly invited. I found this online (http://office.microsoft.com/en-us/outlook-help/keep-everyone-informed-about-time-away-from-the-office-HA010209819.aspx) which APPEARS to say that what I want to do isn't built in functionality (since it shows a bunch of steps to go through. I'd PREFER not to have to add this stuff to everyone else's personal calendar directly. So... Is this possible to do, natively (i.e. directly in Outlook)? Would a Sharepoint calendar make more sense and allow this functionality? Is there a way to do what I want which will allow the other team members to be notified? Like I said, I'm looking for as simple an interface as possible - these people aren't going to want to do much more than open something and change dates. Additionally, they're probably not going to have any fancy software on their PC's, although they will be up to date with Java and (maybe) .NET frameworks. Also, before anyone gets funny, yes, this has to work with Outlook 2007, as it's a corporate standard - we're not able to change that, even though e.g. Google Calendar would do this wonderfully. Obviously if this functionality is available in Outlook 2010, then fantastic - we might be able to upgrade. Thanks!

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• What happens to missed writes after a zpool clear?

  - by Kevin

  I am trying to understand ZFS' behaviour under a specific condition, but the documentation is not very explicit about this so I'm left guessing. Suppose we have a zpool with redundancy. Take the following sequence of events: A problem arises in the connection between device D and the server. This causes a large number of failures and ZFS therefore faults the device, putting the pool in degraded state. While the pool is in degraded state, the pool is mutated (data is written and/or changed.) The connectivity issue is physically repaired such that device D is reliable again. Knowing that most data on D is valid, and not wanting to stress the pool with a resilver needlessly, the admin instead runs zpool clear pool D. This is indicated by Oracle's documentation as the appropriate action where the fault was due to a transient problem that has been corrected. I've read that zpool clear only clears the error counter, and restores the device to online status. However, this is a bit troubling, because if that's all it does, it will leave the pool in an inconsistent state! This is because mutations in step 2 will not have been successfully written to D. Instead, D will reflect the state of the pool prior to the connectivity failure. This is of course not the normative state for a zpool and could lead to hard data loss upon failure of another device - however, the pool status will not reflect this issue! I would at least assume based on ZFS' robust integrity mechanisms that an attempt to read the mutated data from D would catch the mistakes and repair them. However, this raises two problems: Reads are not guaranteed to hit all mutations unless a scrub is done; and Once ZFS does hit the mutated data, it (I'm guessing) might fault the drive again because it would appear to ZFS to be corrupting data, since it doesn't remember the previous write failures. Theoretically, ZFS could circumvent this problem by keeping track of mutations that occur during a degraded state, and writing them back to D when it's cleared. For some reason I suspect that's not what happens, though. I'm hoping someone with intimate knowledge of ZFS can shed some light on this aspect.

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• iotop for Linux kernel 2.6.18

  - by Lightsauce

  So it has to come to my attention that iotop isn't availalbe for 2.6.18 since it's less than 2.6.20 and requires Python 2.6+. I've done some research and came across this article: http://lserinol.blogspot.com/2009/09/io-usage-per-process-on-linux.html According to this, if these process have io stats in /proc/pid#/io (where pid# is the process #) it's doable regardless of the kernel version. So, in reality, I could upgrade Python to 2.6 and test out iotop. However, my flavor of Linux, CentOS release 5.5 (Final), only supports Python 2.4.3-44.el5 currently. If I were to do uninstall from yum, it doesn't look so pretty. It ends up wanting to uninstall 235 packages, most of which are very important! I read in one place, online (I forget the URL from yesterday), that you can install Python 2.6+ parallel to this one, and have the rpm install for iotop use that. Well, I didn't choose that route. I figured, what the heck, lets write iotop (not copying it, but reverse engineering it without actually looking at it's code/it in use) in bash. I thought it would just grab the /proc/pid#/io file and parse stats. So I wrote a script to grab the top 10 rchar, wchar, read_bytes, and write_bytes by collecting all these stats from all the /proc/pid#/io files, sorting them by each metric, then grabbing the top 10 highest values. The conclusion, the data seems completely useless. Does anybody know any resources for advanced Linux where I can figure out how to take these /proc/pid#/ directories and figure out what the heck they are doing with io on the disk? My main goal is to figure out what exactly is causing high load on my disk. I just know it's on the / partition (/dev/sda2 in this case), and I'm not really sure how to narrow it down without the help of iotop. If I run iostat to grab metrics for 1 minute, every second, the first result it gives me shows a high 'kB_read/s', so that makes me think, it's reading mostly. However, if I watch the update it gives me every second, it's actually just showing values for kB_wrtn/s. This makes me think the initial value iostat gives me is misleading.

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