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• BSOD & System Failure after trying to install a new RAM

  - by Praveen Kumar

  I have updated the question with sections, so that people won't find it difficult to read. Basic System Information Let me give a basic introduction on my system. I have a system of following configuration: Processor: Intel(R) Core(TM) i7-2600 CPU @ 3.40GHz 3.40GHz RAM: Corsair Vengeance - 4GB Single Module DDR3 Memory Kit (CMZ4GX3M1A1600C9) x 2 OS: Windows 7 Ultimate, SP1 Build 7601 HDD: 1 TB Seagate 7200 RPM The Problem It was working fine for about an year. Yesterday I planned to increase my RAM to 16 GB by putting another set of two Corsair Vengeance - 4GB Single Module DDR3 Memory Kit (CMZ4GX3M1A1600C9). I got it from an authorized reseller and also, the RAM was fitted by a service engineer only. After the RAM was fit (all the four), the system failed to start, with an error code of 0x000000f4. The complete information of it is: Problem signature: Problem Event Name: BlueScreen OS Version: 6.1.7601.2.1.0.256.1 Locale ID: 16393 Additional information about the problem: BCCode: f4 BCP1: 0000000000000003 BCP2: FFFFFA8008A39060 BCP3: FFFFFA8008A39340 BCP4: FFFFF800037C8510 OS Version: 6_1_7601 Service Pack: 1_0 Product: 256_1 Files that help describe the problem: C:\Windows\Minidump\093012-13041-01.dmp C:\Users\Praveen Kumar\AppData\Local\Temp\WER-30716-0.sysdata.xml Read our privacy statement online: http://go.microsoft.com/fwlink/?linkid=104288&clcid=0x0409 If the online privacy statement is not available, please read our privacy statement offline: C:\Windows\system32\en-US\erofflps.txt Another Problem We first thought that it was the RAM, which caused the issue. So I returned the RAMs and now my computer configuration is exactly how it was the previous day. But, following the removal of the RAM, I also had several crashes after that. One suspicious thing was with an error code c0000134: STOP: c0000135 The program can’t start because %hs is missing from your computer . Try resintalling the program to fix this problem. After reading contents from this, this and this, which were never my case, they didn't help me. But I didn't receive any more STOP c0000134 messages. But this 0x000000f4 keeps on coming. I am writing from the same system and it allows me to work for say, half an hour max. Then I hear a device disconnect sound, the one you hear in Windows 7, when a USB Mass Storage Device is plugged out. Immediately following that, my screen goes blank and I get 0x000000f4 blue screen. Okay, now I am really concerned about my Hard Disk data, but I have no clue if there is a problem with the HDD. My Question What all files do I need to submit for your reference? Can this issue be fixed? I am getting more time if I remove my RAM, clean it and then put it back. Weird! Hope I have given the necessary information to help you guys. Thanks in advance. Minidumps I have uploaded all the Minidump DMP files from C:\Windows\Minidump folder here: http://www.praveen-kumar.com/Minidumps.zip Let me know if you face any issues in accessing it. Will be able to share elsewhere. Updates 30-Sep-2012 10:15 AM IST: When I keep the system cover opened, pressed the HDD Cable well, it is allowing me to be on for about half an hour, I guess? Also, I feel that the CPU fan speed is kind of slow. It rotates at around 900 RPM, but the CPU Temperature is not more than 70° C. 30-Sep-2012 10:30 AM IST: My Modem (Beetel 220BX ADSL2+ Router) failed. I have no idea how it is related to this issue, but I thought that I need to document this too. I really have a bad day here. 30-Sep-2012 11:00 AM IST: System still running fine, with the cabinet cover open, now for about an hour. 30-Sep-2012 12:00 PM IST: I shut down the system and closed the cabinet. Started the system, and it hung after giving the password. After a few minutes, got the same 0x000000f4 error. So, while it is in the upright position, fixed the Hard Disk cable and now it is booting fine. Waiting for more observations and answers.

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• Windows Server 2008 R2 install reboots unexpectedly during "Completing installation" phase

  - by knda

  I am attempting to install Windows Server 2008 R2 onto a Cisco UCS C201 M2 rack mounted server but am having major difficulties and wondering if anyone has some insight or items they could recommend for me to look at to get this one resolved. Installation is being attempted via the Cisco remote console (using CIMC's Virtual dvd-rom).. following the first phase of Setup where the installation files are copied to the target hard drive, then a reboot occurs to load Setup from the HDD, mid-way in the "Completing Installation" phase the system then reboots unexpectedly. System configuration Cisco UCS C201 M2 (2RU rack mounted server) 16GB RAM, 2x 73GB 15K SAS, 4x 300GB 10k SAS Add-on cards - Intel quad-port GigE card (no fibre channel cards) Storage - LSI MegaRAID SAS 9261-8i. onboard SATA is disabled (no SATA drives connected) KVM - Belkin No physical DVD-ROM.. :( I have... Run memtest86+, no RAM faults Disabled/enabled SATA support (BIOS) Attempted install from USB DVD-ROM, no effect Attempted unattended install scripted via Cisco Configuration Manager DVD provided Removed Belkin KVM in case that was causing drama Discovered that the Cisco website is "awesome" for searching for PDFs/Drivers cough, reverted back to Google Downloaded latest LSI drivers from LSI's site and used during Server 2008 install checked Windows ISO against checksum's from MS site checked Windows ISO by using it for an install in a VM Running out of ways to troubleshoot this as I am not sure how to enable any sort of 'verbose' mode during the setup process. Next step I have planned is to remove the Intel NIC and try the installation again.. Edit: Problem was the "Cisco INTEL QUAD PT GBE" (1000/PT) .. will have to see if this card is faulty or if it's just drivers.. thanks for the help.

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• How to prevent blocking http auth popups on firefox restart with many tabs open

  - by Glen S. Dalton

  I am using the latest firefox with tab mix plus and tabgoups manager. I have maybe 50 or 100 tabs oben in different tab groups. When I shutdown firefox and start it again all tabs and tab groups are perfectly rebuilt. But I have also many pages open that are behind a standard http auth, and these pages all request their usernames and passwords. So during startup firefox pops up all these pages' http auth windows. And they block everything else in firefox, they are like modal windows. (I am involved in website development and the beta versions are behind apache http auth.) I have to click many times the OK button in the popups, before I can do anything. All the usernames and passwords are already filled in. (And the firefox taskbar entry blinks and the firefox window heading also blinks, and focus switches back and foth, which also annoys me. And sometimes the popups do not react to my clicks, because firefox is maybe just switching focus somewhere else. This is the worst.) I want a plugin or some way to skip those popups. There are some plugins I tried some time ago, but they did not do what I need, because they require a mouse click for each login, which is no improvement over the situation like it already is. This is not about password storage (because firefox already stores them). But of course, if some password storing plugin could heal this it would be great.

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• 24TB RAID 6 configuration

  - by Phil

  I am in charge of a new website in a niche industry that stores lots of data (10+ TB per client, growing to 2 or 3 clients soon). We are considering ordering about $5000 worth of 3TB drives (10 in a RAID 6 configuration and 10 for backup), which will give us approximately 24 TB of production storage. The data will be written once and remain unmodified for the lifetime of the website, so we only need to do a backup one time. I understand basic RAID theory, however I am not experienced with it. My question is, does this sound like a good configuration? What potential problems could this setup cause? Also, what is the best way to do a one-time backup? Have two RAID 6 arrays, one for offsite backup and one for production? Or should I backup the RAID 6 production array to a JBOD? EDIT: The data server is running Windows 2008 Server x64. EDIT 2: To reduce rebuild time, what would you think about using two RAID 5's instead of one RAID 6?

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• Why is Automator crashing on launch?

  - by zbrimhall

  I've run into an odd problem where Automtor.app on Snow Leopard crashes on launch. At some point in the past, I put a copy of iPhoto.app into my public directory to copy over to another machine. Now, Automator.app won't run unless my public directory has a copy of iPhoto.app in it. If I remove it, Automator.app crashes on launch. Here's what happens: Launch Automator.app After the Automator menu bar appears, but before any windows appear, I get the dreaded beach ball for a few seconds Automator crashes Here's the output from Console.app: 12/26/09 2:11:24 PM Automator[11736] The action “Add Movie to iDVD Menu” could not be loaded because the application “iDVD” was not found. 12/26/09 2:11:24 PM Automator[11736] The action “Get iDVD Slideshow Images” could not be loaded because the application “iDVD” was not found. 12/26/09 2:11:24 PM Automator[11736] The action “Initiate Remote Broadcast” could not be loaded because the application “QuickTime Broadcaster” was not found. 12/26/09 2:11:24 PM Automator[11736] The action “New iDVD Menu” could not be loaded because the application “iDVD” was not found. 12/26/09 2:11:24 PM Automator[11736] The action “New iDVD Movie Sequence” could not be loaded because the application “iDVD” was not found. 12/26/09 2:11:24 PM Automator[11736] The action “New iDVD Slideshow” could not be loaded because the application “iDVD” was not found. 12/26/09 2:11:24 PM Automator[11736] The action “New QuickTime Slideshow” could not be loaded because the application “QuickTime Player” was not found. 12/26/09 2:11:24 PM Automator[11736] The action “Set iDVD Background Image” could not be loaded because the application “iDVD” was not found. 12/26/09 2:11:24 PM Automator[11736] The action “Set iDVD Button Face” could not be loaded because the application “iDVD” was not found. 12/26/09 2:11:24 PM Automator[11736] The action “Set Movie Annotations” could not be loaded because the application “QuickTime Player” was not found. 12/26/09 2:11:24 PM Automator[11736] The action “Set Movie Playback Properties” could not be loaded because the application “QuickTime Player” was not found. 12/26/09 2:11:24 PM Automator[11736] The action “Set Movie URL” could not be loaded because the application “QuickTime Player” was not found. 12/26/09 2:11:24 PM Automator[11736] The action “Show Main iDVD Menu” could not be loaded because the application “iDVD” was not found. 12/26/09 2:11:25 PM Automator[11736] Can not ID UTI for path The value %@ is invalid.: The file “The value %@ is invalid.” couldn’t be opened because there is no such file. 12/26/09 2:11:25 PM Automator[11736] Can not ID UTI for path /Users/brimhall/Public/iPhoto.app: The file “iPhoto.app” couldn’t be opened because there is no such file. 12/26/09 2:11:25 PM Automator[11736] Can not ID UTI for path The value %@ is invalid.: The file “The value %@ is invalid.” couldn’t be opened because there is no such file. 12/26/09 2:11:26 PM Automator[11736] -[NSAttributeDictionary length]: unrecognized selector sent to instance 0x49c770 12/26/09 2:11:26 PM Automator[11736] -[NSAttributeDictionary length]: unrecognized selector sent to instance 0x49c770 12/26/09 2:11:38 PM com.apple.launchd.peruser.501[203] ([0x0-0x2ad2ad].com.apple.Automator[11736]) Job appears to have crashed: Segmentation fault I've tried deleting my Automator.app Preferences file and Application Support directory to get it to look for iPhoto.app in the system-wide Applications directory, but to no avail. Any suggestions on how I can get things working as normal?

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• How clean is deleting a computer object?

  - by Kevin

  Though quite skilled at software development, I'm a novice when it comes to Active Directory. I've noticed that AD seems to have a lot of stuff buried in the directory and schema which does not appear superficially when using simplified tools such as Active Directory Users and Computers. It kind of feels like the Windows registry, where COM classes have all kinds of intertwined references, many of which are purely by GUID, such that it's not enough to just search for anything referencing "GadgetXyz" by name in order to cleanly remove GadgetXyz. This occasionally leads to the uneasy feeling that I may have useless garbage building up in there which I have no idea how to weed out. For instance, I made the mistake a while back of trying to rename a DC, figuring I could just do it in the usual manner from Control Panel. I found references to the old name buried all over the place which made it impossible to reuse that name without considerable manual cleanup. Even long after I got it all working, I've stumbled upon the old name hidden away in LDAP. (There were no other DCs left in the picture at that time so I don't think it was a tombstone issue.) More specifically, I'm worried about the case of just outright deleting a computer from AD. I understand the cleanest way to do it is to log into the computer itself and tell it to leave the domain. (As an aside, doing this in Windows 8 seems to only disable the computer object and not delete it outright!) My concern is cases where this is not possible, for instance because it was on an already-deleted VM image. I can simply go into Active Directory Users and Computers, find the computer object, click it, and press Delete, and it seems to go away. My question is, is it totally, totally gone, or could this leave hanging references in any Active Directory nook or cranny I won't know to look in? (Excluding of course the expected tombstone records which expire after a set time.) If so, is there any good way to clean up the mess? Thank you for any insight! Kevin ps., It was over a year ago so I don't remember the exact details, but here's the gist of the DC renaming issue. I started with a single 2008 DC named ABC in a physical machine and wanted to end up instead with a DC of the same name running in a vSphere VM. Not wanting to mess with imaging the physical machine, my plan instead was: Rename ABC to XYZ. Fresh install 2008 on a VM, name it ABC, and join it to the domain. (I may have done the latter in the same step as promoting to DC; I don't recall.) dcpromo the new ABC as a 2nd DC, including GC. Make sure the new ABC replicated correctly from XYZ and then transfer the FSMO roles from XYZ to it. Once everything was confirmed to work with the new ABC alone, demote XYZ, remove the AD role, and remove it from the domain. Eventually I managed to do this but it was a much bumpier ride than expected. In particular, I got errors trying to join the new ABC to the domain. These included "The pre-windows 2000 name is already in use" and "No mapping between account names and security IDs was done." I eventually found that the computer object for XYZ had attributes that still referred to it as ABC. Among these were servicePrincipalName, msDS-AdditionalDnsHostName, and msDS-AdditionalSamAccountName. The latter I could not edit via Attribute Editor and instead had to run this against XYZ: NETDOM computername <simple-name> /add:<FQDN> There were some other hitches I don't remember exactly.

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• Issue with InnoDB engine while enabling and [ skip-innodb ] - [ERROR] Plugin 'InnoDB' init function returned error

  - by Ahn

  How to enable InnoDB, which was previously disabled with skip-innodb option. Case 1: Disabled the innodb with skip-innodb option and show engines givens as below. Engine | Support ... | InnoDB | NO ...... Case 2: As I want to enable the innodb, I commanded the #skip-innodb option and restarted. But now the show engines even not showing the InnoDB engine in the list. ? Mysql Version : 5.1.57-community-log OS : CentOS release 5.7 (Final) Log: 120622 13:06:36 InnoDB: Initializing buffer pool, size = 8.0M 120622 13:06:36 InnoDB: Completed initialization of buffer pool InnoDB: No valid checkpoint found. InnoDB: If this error appears when you are creating an InnoDB database, InnoDB: the problem may be that during an earlier attempt you managed InnoDB: to create the InnoDB data files, but log file creation failed. InnoDB: If that is the case, please refer to InnoDB: http://dev.mysql.com/doc/refman/5.1/en/error-creating-innodb.html 120622 13:06:36 [ERROR] Plugin 'InnoDB' init function returned error. 120622 13:06:36 [ERROR] Plugin 'InnoDB' registration as a STORAGE ENGINE failed. 120622 13:06:36 [Note] Event Scheduler: Loaded 0 events 120622 13:06:36 [Note] /usr/sbin/mysqld: ready for connections. Version: '5.1.57-community-log' socket: '/data/mysqlsnd/mysql.sock1' port: 3307 MySQL Community Server (GPL)

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• Multiple Homed Windows 2008 Server / Windows 7 Client

  - by Daniel Scott

  I have a small Windows 2008 network, with some Windows 7 clients. The clients are both laptops with docking stations and I would like them to communicate with the Windows 2008 server (for filesharing) through the wired network whilst they're docked. Internet connectivity for all machines (clients and server) is via a Wireless LAN, so the wireless adapter in the Windows 7 clients stays active while they're docked. When the laptops are un-docked, it would be nice to still be able to contact the windows 2008 server for print sharing (and slower file sharing) - hence the server also being on the wireless LAN. The windows 2008 server is running Active Directory, DHCP and DNS. It controls DHCP leases on the wired network and holds the DNS records for "myserver.mycompany.local", which is what the filesharing clients connect to. Ideally I'd like the DNS records to return the wired IP first so that this is the address that the laptops will attempt initially - but there doesn't seem to be a way to do that? At present the server's IP on the wireless LAN comes out of an nslookup above the wired Lan IP. The multi-homing works perfectly - but in the wrong order! Switch on the wireless lan and ping myserver and it goes to the wireless IP. Disable the wireless on the client and do the same ping again and after a couple of seconds it starts pinging the wired address. Does anyone have any suggestions on how to make this work in a predictable order? - or even if it can work. Alternative 1? If it can't work, then would this work: Remove the wireless adapter from the server, put a wireless router/bridge on the wired network (set up to route to/from the wireless LAN's subnet), then configure the clients with two routes to the (now) single IP of the server with metrics favouring direct communication over the wired LAN first? Alternative 2? Should I instead single-home the laptops so all of their connectivity is via the wired-LAN while they're docked? (and route via the windows 2008 server - or a dedicated wireless bridge/router)? My concern here is that I'd like undocking to be seamless - and if the clients are in the middle of downloading something from the internet I wouldn't want whatever they're doing interupted as they switch IP addresses onto the Wireless network. Perhaps this isn't the case and I'm concerned over nothing? Any thoughts? :) UPDATE I seem to have cracked it (at least DNS entries come out in the order I hope for - and pinging the server with various combinations of wired, wireless and both interfaces enabled uses the IP I want) ... I set the binding order of the NICs on the Server (which is acting as Domain Controller, DHCP and DNS server) so that the Wired NIC is before the Wireless adapter. (Start -- type "Network Interfaces" -- Select "View Network Connections" -- Press Alt to show classic dropdown menus -- Advanced -- Advanced Settings) Now, an nslookup (from the client) of the server's hostname returns the Wired IP first, followed by the Wireless IP. The wired IP now seems to be used whenever it's contactable. Incidentally, the metrics on the wired and wireless routes (on the client) also favour the wired LAN (based on Windows' automatically assigned metrics) - but this was always the case, even when I was having trouble getting the wired IP to be "favoured". I'm not entirely sure if this is coincidence - or if a DNS server running on Windows, handing back IP addresses for itself does actually take the binding order of it's own network interfaces into account? It would be interesting to hear from someone who can confirm or deny that (or confirm that the binding order on the server plays a role for some other reason?)

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• Dell PowerEdge 1600SC Server won't boot from Fedora 12 DVD because of CD only drive.

  - by studiohack23

  Dell PowerEdge 1600SC Server won't boot from Fedora 12 DVD in the drive because it only supports CDs as I found out after the fact. I'm a complete novice @ servers, so if you need more detail, let me know, and I'll try to provide it. This server is around 4-6 years old. it has "PXE" boot, not sure what that means? This particular server has 3 RAID hard drives. As far as I know, they have all been wiped. I looked up the service tag on Dell, and it has: Compact Disk Drive, 650M, I Internal, Half Height, 48X, BlackHitachi LG Data Storage as its CD drive. Thus, the CD drive does not support DVDs, so installation will have to be via a live CD. However, I'm trying to put Amahi Home Server (http://www.amahi.org/), and Live CD/USB stick installs are not recommended unless one is an expert Linux user. any suggestions as to how to get around this? PROBLEM SOLVED! THANKS for all the help!

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• Should I persist images on EBS or S3 ??

  - by enes

  Hi; I am migrating my Java,Tomcat, Mysql server to AWS EC2. I have already attached EBS volume for storing Mysql data. In my web application people may upload images. So I should persist them. There are 2 alternatives in my mind. 1- Save uploaded images to EBS volume. 2- Use S3 service. The followings are my notes, please be skeptic about them, as my expertise is not on servers, but software development. EBS plus: S3 storage is more expensive. (0.15 $/Gb 0.1$/Gb) S3 plus: Serving statics from EBS may influence my web server's performance negatively. Is this true? Does Serving images affect server performance notably? For S3 my server will not be responsible for serving statics. S3 plus: Serving statics from EBS may result I/O cost, probably it will be minor. EBS plus: People say EBS is faster. S3 plus: People say S3 is more safe for persistence. EBS plus: No need to learn API, it is straight forward to save the images to EBS volume. Namely I can not decide, will be happy if you guide. Thanks

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• Error when attempting to do a differential or incremental backup of Exchange using ntbackup

  - by voon

  Hi folks, We're running Small Business Server 2003 here. I was reviewing our backup procedures lately and noticed in the ntbackup logs that the differential backups of Exchange were failing with the error: (SERVERNAME)\Microsoft Information Store\First Storage Group is not a valid drive, or you do not have access. A quick search of google found this MS KB article: http://support.microsoft.com/kb/555613 However, both of the suggested fixes don't to apply to our problem. First solution is to make sure the backup media is formatted and has adequate space. Well, our backup target is a 1 TB external hard drive with about 600 gigs of free space. (A full backup of our Exchange DB is currently around 5 GB) The second suggested fix is to "perform a full backup before trying to do incremental". And again, that can't it because we are doing full backups twice a week. There are no errors in the application log, just entries for ntbackup starting and ending. I've also tested doing an differential & incremental backup onto the server's internal drive, which unsurprising still did not work. I could get around this problem by always doing a full backup of Exchange but I kind of like the idea of being space efficient with doing differential backups. Anyone got any ideas?

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• Unable to connect to shared (iscsitarget) dvd-rw drive on ubuntu karmic box

  - by develop7

  Preface: I have desktop with DVD-RW drive that runs primarily on Linux (namely Ubuntu 9.10). My wife has netbook that rins Windows XP with no cd/dvd drive. There's also LAN through our ADSL modem/router. I've "ported" (actually, I've just grabbed sources and ran dpkg-buildpackage) iscsitarget package from Ubuntu Lucid to Karmic (here are packages), installed it (sudo aptitude install iscsitarget; sudo m-a a-i iscsitarget) and configured it in the following way (/etc/ietd.conf): Target iqn.2020-01.local.develop7-desktop:storage.disc.dvdrw Lun 0 Path=/dev/sr0,Type=blockio #I've skipped commented lines Also, I've opened port 3260 with ufw: $ sudo ufw status | grep 3260 3260 ALLOW 192.168.1.0/24 But (here's the trouble) I still can't connect to this target from Windows box. Microsoft Software iSCSI Initiator tells "Logon failure" upon connect attempt. After unsuccessful connection attempt I've noticed this line in dmesg | tail's output: iscsi_trgt: ioctl(299) invalid ioctl cmd c078690d So the question is — what's wrong with my config/iSCSI target/whatever else? Or, in short — what I'm doing wrong? Thanks in advance.

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• Unable to connect to shared (iscsitarget) dvd-rw drive on ubuntu karmic box

  - by Develop7

  Intro I have desktop with DVD-RW drive that runs primarily on Linux (namely Ubuntu 9.10). My wife has netbook that rins Windows XP with no cd/dvd drive. There's also LAN through our ADSL modem/router. I've "ported" (actually, I've just grabbed sources and ran dpkg-buildpackage) iscsitarget package from Ubuntu Lucid to Karmic (here are packages), installed it (sudo aptitude install iscsitarget; sudo m-a a-i iscsitarget) and configured it in the following way (/etc/ietd.conf): Target iqn.2020-01.local.develop7-desktop:storage.disc.dvdrw Lun 0 Path=/dev/sr0,Type=blockio #I've skipped commented lines Also, I've opened port 3260 with ufw: $ sudo ufw status | grep 3260 3260 ALLOW 192.168.1.0/24 Problem But (here's the trouble) I still can't connect to this target from Windows box. Microsoft Software iSCSI Initiator screams "Logon failure" upon connect attempt, and, respectively, fails to connect. After unsuccessful connection attempt I've noticed this line in dmesg | tail's output: iscsi_trgt: ioctl(299) invalid ioctl cmd c078690d Question So the question is — what's wrong with my config/iSCSI target/whatever else? Or, in short — what I'm doing wrong? Thanks in advance.

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• Intermittent 404 on select assets, LAMP stack

  - by Tom Lagier

  We have a LAMP stack WordPress server that is serving most assets correctly. However, one plugin's CSS file and several images are returning soft 404s roughly 20% of the time. I can't find any reference to the 404 in the access logs, but the browser is definitely receiving a 404 response from somewhere (WordPress, I would assume). When I use an alias URL that does not match the site URL but does resolve to the asset path, the resource loads correctly 100% of the time. However, using the site url only resolves for the select, problematic assets 20% of the time. You can test one of the problematic assets here: http://www.mreco.org/wp-content/uploads/2014/05/zero-cost.jpg However the alias link always resolves correctly: http://mr-eco.wordpress.promocampaigns.com/wp-content/uploads/2014/05/zero-cost.jpg Stranger, if I attempt to access outdated content that definitely does not exist on the server, at the live URL it returns the content roughly 50% of the time. Using the alias link, it 404s 100% of the time - the correct behavior. Error log and PHP error log are clean. A sample access log (pulled from grep 'zero-cost.jpg' /var/log/httpd/mr-eco-access_log) from several refreshes of the live direct link (where I am not seeing any 404's): 10.166.202.202 - - [28/May/2014:20:27:41 +0000] "GET /wp-content/uploads/2014/05/zero-cost.jpg HTTP/1.1" 304 - 10.166.202.202 - - [28/May/2014:20:27:42 +0000] "GET /wp-content/uploads/2014/05/zero-cost.jpg HTTP/1.1" 304 - 10.166.202.202 - - [28/May/2014:20:27:43 +0000] "GET /wp-content/uploads/2014/05/zero-cost.jpg HTTP/1.1" 304 - 10.166.202.202 - - [28/May/2014:20:27:43 +0000] "GET /wp-content/uploads/2014/05/zero-cost.jpg HTTP/1.1" 304 - 10.176.201.37 - - [28/May/2014:20:27:56 +0000] "GET /wp-content/uploads/2014/05/zero-cost.jpg HTTP/1.1" 200 57027 Chrome's dev tools list the following network activity before displaying 404 page content: zero-cost.jpg /wp-content/uploads/2014/05 GET 404 Not Found text/html Other 15.9?KB 73.2?KB 953?ms 947?ms My Apache configuration is standard, I've listed the virtual host entry and .htaccess file below. I can provide other parts of Apache config if necessary. Virtual host: <VirtualHost *:80> DocumentRoot /var/www/public_html/mr-eco.wordpress.promocampaigns.com ServerName www.mreco.org ServerAlias mreco.org mr-eco.wordpress.promocampaigns.com ErrorLog logs/mr-eco-error_log CustomLog logs/mr-eco-access_log common <Directory /var/www/public_html/mr-eco.wordpress.promocampaigns.com> AllowOverride All SetOutputFilter DEFLATE </Directory> </VirtualHost> .htaccess: # BEGIN WordPress <IfModule mod_rewrite.c> RewriteEngine On RewriteBase / RewriteRule ^index\.php$ - [L] RewriteCond %{REQUEST_FILENAME} !-f RewriteCond %{REQUEST_FILENAME} !-d RewriteRule . /index.php [L] </IfModule> # END WordPress I have checked for multiple A records and can confirm that there is a single A record pointing at the domain: ;; ANSWER SECTION: mreco.org. 60 IN A 50.18.58.174 I'm fairly new to systems administration, and at a complete loss as to what could cause this. In the past, inconsistently 404ing assets have been because of out-of-sync instances behind a load balancer. In this case, it is a single instance behind the load balancer. Because of the inconsistency, it feels like a caching issue. We don't make use of Apache caching, and as far as I know WordPress should not be caching either. What I've done so far: Reset WordPress permalinks Disabled WordPress plugins Re-generated WordPress .htaccess file Swapped ServerName and ServerAlias directives Cleared browser cache Confirmed disk location of resources Checked PHP, access, and error logs Confirmed correct DNS setup (can post if necessary) I'm at a total loss. Thanks for helping me out!

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• LSI 9260-8i w/ 6 256gb SSDs - RAID 5, 6, 10, or bad idea overall?

  - by Michael Pearson

  We're provisioning a new production server for our reasonably busy website. Our choice of host have available a 6 drive configuration with a LSI 9260-8i card. My initial thought was to fill all six bays with SSDs (Intel 520 256gb) and set them up in RAID. Good, bad, or terrible idea? Can the card handle it? Should we be using RAID 5, 6 or 10? This would be the first time the provider have filled all six slots for this rackmount with SSDs, so they're a bit hesitant. I'm wondering if somebody else with this card has done something similar in a production environment. We do about 43gb of writes per day and currently use about 300gb of storage. The server acts as webserver, database, and image store for approx 1 million files. The plan is to underprovision the SSDs by approximately 10% to 20% to increase their overall lifespan & performance. The fallback option is 2x480gb SSDs in RAID 1 and another 2x1TB HDDs in RAID 1. The motivation behind this is that the server rental cost difference between 2xSSDs and 6xSSDs is minimal (compared to the overall cost of the rental). We do not have any special high-IOPs requirements. However, if the configuration is known to work, I don't see a good reason to not use it and not have to worry about having separate 'fast and small' and 'slow and large' disks.

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• Windows XP mounting USB drive to same letter as previously mapped network drive

  - by GAThrawn

  Why does Windows always mount a USB drive as the next drive letter after the last physical drive, even when that letter is already taken by a mapped drive, and is there any way to improve this behaviour? What happens is I tend to use a few different flash drives on my PC, as well as having both a Blackberry and a personal phone that mount as USB drives when I plug them in to charge. Being on a corporate PC I also have a number of mapped network drives (some set by login script, some set as persistent mappings in my profile). When I first login I'll have drive letters like this: C: - Local Drive D: - DVD Drive G: - Login script mapped drive J: - Login script mapped drive When I plug the Blackberry in it'll mount two drives (one for onboard storage, one for the SD card) as E: and F:. If I then plug in another USB drive it will mount as G:, even though that's already taken by a network mapped drive. This leaves me with the following drives: C: - Local Drive D: - DVD Drive E: - USB drive (Blackberry) F: - USB drive (Blackberry) G: - Login script mapped drive [G: - USB drive - mounted but not visible in Explorer or command prompt] J: - Login script mapped drive I then have to go into Disk Management, find the new USB drive that's mounted to G: and re-assign it to another letter eg Z:, once this is done Auto-Play detects it and throws up its normal dialog, and its browseable in Explorer. While this is OK to do if you only use one or two USB drives and have admin access to your PC with your login account, its a total pain in the proverbial if you regularly use a whole load of different USB devices, and corporate policy means you have one account for your normal login (that only has User access to workstations), but have to use a different account for any privileged action. I realize that one possible reason for this is the difference between hardware which is mounted and assigned drive letters at the systen level, and mapped drives which are done at the user level. For USB devices that are already plugged in before login, then obviously they're mounted before Windows knows what network drives may be mapped. However if you plug the USB devices in after you're fully logged in and have drives mapped then Windows must know which letters are available?

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• Copying SD Cards with "LaCie d2 Network"

  - by rjstelling

  The LaCie d2 Network has a feature where by you can attach a USB drive and press the blue button at the from and it will copy the drive contents (no computer required). (See this review for more info). USB 2.0 and eSATA ports are also provided but these are not designed for extending the d2 Network's storage. Rather, they allow you to connect portable drives for uploading their data to the d2 Network directly. The process is quite slick, too: just plug in a drive and press the big blue button on the front of the unit to trigger an immediate upload. This copies over everything on the external device and seems ideal for camera use. Is it possible to use an microSD or SD card adapter (like the Kingston MobileLite 9-in-1) and copy the contents of the card? I'm assuming the card reader just "looks like" a normal USB flash drive the computer or (in this case) LaCie d2 Network. Is this assumption correct? Do you know any reason why this won't work?

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• Raid-5 Performance per spindle scaling

  - by Bill N.

  So I am stuck in a corner, I have a storage project that is limited to 24 spindles, and requires heavy random Write (the corresponding read side is purely sequential). Needs every bit of space on my Drives, ~13TB total in a n-1 raid-5, and has to go fast, over 2GB/s sort of fast. The obvious answer is to use a Stripe/Concat (Raid-0/1), or better yet a raid-10 in place of the raid-5, but that is disallowed for reasons beyond my control. So I am here asking for help in getting a sub optimal configuration to be as good as it can be. The array built on direct attached SAS-2 10K rpm drives, backed by a ARECA 18xx series controller with 4GB of cache. 64k array stripes and an 4K stripe aligned XFS File system, with 24 Allocation groups (to avoid some of the penalty for being raid 5). The heart of my question is this: In the same setup with 6 spindles/AG's I see a near disk limited performance on the write, ~100MB/s per spindle, at 12 spindles I see that drop to ~80MB/s and at 24 ~60MB/s. I would expect that with a distributed parity and matched AG's, the performance should scale with the # of spindles, or be worse at small spindle counts, but this array is doing the opposite. What am I missing ? Should Raid-5 performance scale with # of spindles ? Many thanks for your answers and any ideas, input, or guidance. --Bill Edit: Improving RAID performance The other relevant thread I was able to find, discusses some of the same issues in the answers, though it still leaves me with out an answer on the performance scaling.

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• Performance Tuning a High-Load Apache Server

  - by futureal

  I am looking to understand some server performance problems I am seeing with a (for us) heavily loaded web server. The environment is as follows: Debian Lenny (all stable packages + patched to security updates) Apache 2.2.9 PHP 5.2.6 Amazon EC2 large instance The behavior we're seeing is that the web typically feels responsive, but with a slight delay to begin handling a request -- sometimes a fraction of a second, sometimes 2-3 seconds in our peak usage times. The actual load on the server is being reported as very high -- often 10.xx or 20.xx as reported by top. Further, running other things on the server during these times (even vi) is very slow, so the load is definitely up there. Oddly enough Apache remains very responsive, other than that initial delay. We have Apache configured as follows, using prefork: StartServers 5 MinSpareServers 5 MaxSpareServers 10 MaxClients 150 MaxRequestsPerChild 0 And KeepAlive as: KeepAlive On MaxKeepAliveRequests 100 KeepAliveTimeout 5 Looking at the server-status page, even at these times of heavy load we are rarely hitting the client cap, usually serving between 80-100 requests and many of those in the keepalive state. That tells me to rule out the initial request slowness as "waiting for a handler" but I may be wrong. Amazon's CloudWatch monitoring tells me that even when our OS is reporting a load of 15, our instance CPU utilization is between 75-80%. Example output from top: top - 15:47:06 up 31 days, 1:38, 8 users, load average: 11.46, 7.10, 6.56 Tasks: 221 total, 28 running, 193 sleeping, 0 stopped, 0 zombie Cpu(s): 66.9%us, 22.1%sy, 0.0%ni, 2.6%id, 3.1%wa, 0.0%hi, 0.7%si, 4.5%st Mem: 7871900k total, 7850624k used, 21276k free, 68728k buffers Swap: 0k total, 0k used, 0k free, 3750664k cached The majority of the processes look like: 24720 www-data 15 0 202m 26m 4412 S 9 0.3 0:02.97 apache2 24530 www-data 15 0 212m 35m 4544 S 7 0.5 0:03.05 apache2 24846 www-data 15 0 209m 33m 4420 S 7 0.4 0:01.03 apache2 24083 www-data 15 0 211m 35m 4484 S 7 0.5 0:07.14 apache2 24615 www-data 15 0 212m 35m 4404 S 7 0.5 0:02.89 apache2 Example output from vmstat at the same time as the above: procs -----------memory---------- ---swap-- -----io---- -system-- ----cpu---- r b swpd free buff cache si so bi bo in cs us sy id wa 8 0 0 215084 68908 3774864 0 0 154 228 5 7 32 12 42 9 6 21 0 198948 68936 3775740 0 0 676 2363 4022 1047 56 16 9 15 23 0 0 169460 68936 3776356 0 0 432 1372 3762 835 76 21 0 0 23 1 0 140412 68936 3776648 0 0 280 0 3157 827 70 25 0 0 20 1 0 115892 68936 3776792 0 0 188 8 2802 532 68 24 0 0 6 1 0 133368 68936 3777780 0 0 752 71 3501 878 67 29 0 1 0 1 0 146656 68944 3778064 0 0 308 2052 3312 850 38 17 19 24 2 0 0 202104 68952 3778140 0 0 28 90 2617 700 44 13 33 5 9 0 0 188960 68956 3778200 0 0 8 0 2226 475 59 17 6 2 3 0 0 166364 68956 3778252 0 0 0 21 2288 386 65 19 1 0 And finally, output from Apache's server-status: Server uptime: 31 days 2 hours 18 minutes 31 seconds Total accesses: 60102946 - Total Traffic: 974.5 GB CPU Usage: u209.62 s75.19 cu0 cs0 - .0106% CPU load 22.4 requests/sec - 380.3 kB/second - 17.0 kB/request 107 requests currently being processed, 6 idle workers C.KKKW..KWWKKWKW.KKKCKK..KKK.KKKK.KK._WK.K.K.KKKKK.K.R.KK..C.C.K K.C.K..WK_K..KKW_CK.WK..W.KKKWKCKCKW.W_KKKKK.KKWKKKW._KKK.CKK... KK_KWKKKWKCKCWKK.KKKCK.......................................... ................................................................ From my limited experience I draw the following conclusions/questions: We may be allowing far too many KeepAlive requests I do see some time spent waiting for IO in the vmstat although not consistently and not a lot (I think?) so I am not sure this is a big concern or not, I am less experienced with vmstat Also in vmstat, I see in some iterations a number of processes waiting to be served, which is what I am attributing the initial page load delay on our web server to, possibly erroneously We serve a mixture of static content (75% or higher) and script content, and the script content is often fairly processor intensive, so finding the right balance between the two is important; long term we want to move statics elsewhere to optimize both servers but our software is not ready for that today I am happy to provide additional information if anybody has any ideas, the other note is that this is a high-availability production installation so I am wary of making tweak after tweak, and is why I haven't played with things like the KeepAlive value myself yet.

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• How to connect a VM running on an ESXi host to that host via a VMKernel NIC?

  - by Zac B

  Say I have an ESXi (5.0) host that runs a Linux distribution which hosts iSCSI targets, which contain the images for other VMs which the host will run. When it's used, I'll start the host first, then the iSCSI server, and then refresh all storage targets/HBAs in order to see the provided shares as online. I know it's a strange puzzle-box solution, but I was told to implement it. The ESXi host itself has a gigabit NIC which connects to the outside world. The guest OS (CentOS) supports VMXNet3, however, and if I can, I'd like to use its VMXNET3 NIC to host iSCSI for the ESXi host. How should I go about doing this? I went to create a new virtual network, and selected "VKernel", as it suggested that I use that type of network for SAN traffic, but it is apparently not set up for "self-hosted" SAN hosts, as the new network did not appear as an option to attach the CentOS box's VMXNET3 NIC to. How should I best connect an iSCSI host out to its "parent" ESXi host, if I need a) a 10gb connection, and (optionally) b) a VMKernel network for it?

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• Linux Mint 13 is not booting on dual boot computer

  - by Brian

  thanks in advance for your time. I have 2 hard drives in my computer a 300 GB drive which is my primary drive for windows 7 and a 1.5 TB drive that I'd used for storage. When I got it I partitioned 500 GB for use in Linux. So, I created a bootable USB and clicked the "Install by Current Operating System" option from Mint. It installed it to the free 500 GB like I'd hoped it would. Now, I can't get it to boot though. I've tried using EasyBCD to create the boot entry and it hangs on a black screen. Thanks. EDIT @ Ryhuk It presents a menu with two options 1) Windows and 2) Mint. This was a menu I created with easyBCD. When I select option 1 it boots to windows fine. When I select option 2 it hangs on a black screen with just a white bar flashing (Can't remember what its called, it marks the current cursor location on a text field) and won't respond to any key presses but alt ctrl del.

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• Disk IO slow on ESXi, even slower on a VM (freeNAS + iSCSI)

  - by varesa

  I have a server with ESXi 5 and iSCSI attached network storage(4x1Tb Raid-Z on freenas 8.0.4). Those two machines are connected to each other with Gigabit ethernet. The raid-z volume is divided into three parts: two zvols, shared with iscsi, and one directly on top of zfs, shared with nfs and similar. I ssh'd into the freeNAS box, and did some testing on the disks. I used ddto test the third part of the disks (straight on top of ZFS). I copied a 4GB (2x the amount of RAM) block from /dev/zero to the disk, and the speed was 80MB/s. Other of the iSCSI shared zvols is a datastore for the ESXi. I did similar test with time dd .. there. Since the dd there did not give the speed, I divided the amount of data transfered by the time show by time. The result was around 30-40 MB/s. Thats about half of the speed from the freeNAS host! Then I tested the IO on a VM running on the same ESXi host. The VM was a light CentOS 6.0 machine, which was not really doing anything else at that time. There were no other VMs running on the server at the time, and the other two "parts" of the disk array were not used. A similar dd test gave me result of about 15-20 MB/s. That is again about half of the result on a lower level! Of course the is some overhead in raid-z - zfs - zvolume - iSCSI - VMFS - VM, but I don't expect it to be that big. I belive there must be something wrong in my system. I have heard about bad performance of freeNAS's iSCSI, is that it? I have not managed to get any other "big" SAN OS to run on the box (NexentaSTOR, openfiler). Can you see any obvious problems with my setup?

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• Installation of Active Directory on separate VM from DNS does not entierly work - not sure why

  - by René Kåbis

  Not sure what I am doing wrong here. I have a moderately midrange server (16 cores, 2Ghz, 32GB ECC REG RAM, 6TB storage, nothing too extreme) where I am running Hyper-V (Server 2012 R2 Enterprise) in order to provision virtual machines. So why an AD separate from DNS? I want redundancy. I want to be able to move VMs and back them up individually and not have too many services on any one VM. I have already provisioned a VM with DNS, and have set it up right -- essentially, I have: Set up Static IP’s for everyone involved. Installed the DNS service on the DNS VM. Created a forward lookup zone and a reverse lookup zone (primary zone) xyz.ca Configured the zones to use nonsecure and secure dynamic updates (i will change this to secure later after the domain controller is online). Created a A record for the DC in the forward lookup zone (and a reverse ptr) Changed DC’s DNS server (network settings) to the new DNS server. Checked that I can ping the dns server from the new DC by hostname. When I went ahead and did a DCpromo on the DC, and un-cheked the “install DNS” option, everything seemed to go well (no error messages), but I saw no changes on the DNS server whatsoever (no additional settings). Plus, the DNS server seems to be unable to join the domain, as it claims that the domain is not discoverable. As a final note, I do run Symantec Endpoint Protection, which includes a firewall and most settings set as default. I have not yet tried turning this off, but my experience has been that if a service would open up a port on a Windows firewall, it would do the same through Symantec. There is pretty tight integration these days with corporate-class AV and Windows. I have a template vhdx fully set up (just short of any special roles and features) that I can use to replace the current AD VM with, so doing this all over again is not too much skin off of my nose.

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• Moving Farm to co-location hosting - network settings requirements

  - by Saariko

  I am moving my farm (2 Dell's R620) to a co-location hosting service. I am trying to figure out the secure way to have my network settings The requirements are: VM1 is the working HOST, includes: esxi 5.1, vSphere, 4 clients (w2008r2 all) VM2 has esxi 5.1 installed, and a single machine with Veeam Backup and copy 6.5 - keeping a copy of VM1 clients on the VM2 internal storage (this solution is due to a very small budget - in case of failure on Host 1 - can redirect IP's) Only 2 VM clients require network address and access from the WWAN - ISP provides IP's range for them (with Gateway and DNS) I need connection to the iDrac's from my office (option to create a VPN-SSL tunnel) Connection to the vSphere appliances I want to be able to RDP to the VM clients The current configuration is that each host has the iDrac dedicated nic connected , and another (NIC #1) connected - with a static IP on 192.168.3.x The iDrac's have a static IP from the same network range (19.168.3.x) It will look something like this: My thoughts: On NIC#2 of both hosts I will connected a crossed cable I will give each VM clients that needs internet access a 2ndry VM network with the assigned IP from the ISP open only to web - can not access from the My Question: Should I give IP's (external) to the machines who DO NOT require WWAN Access? - I can't see a way to RDP to them directly if not. Should I use the crossed cable? or just plug NIC #2 to the switch? Will this setup even work? What do I need to verify? What Virtual nic's and/or switches should I create on the Hosts?

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• Backup strategy for developer-focused Apple environments?

  - by ewwhite

  It's interesting to see the technological split between structured corporate environments and more developer-driven/startup environments. Some of the Microsoft technologies I take for granted (VSS, Folder Redirection, etc.) simply are not available when managing the increasing number of Apple laptops I see in DevOps shops. I'm interested in centralized and automated backup strategies for a group of 30-40 Apple laptops... How is this typically done safely and securely, assuming these are company-owned machines (versus BYOD)? While Apple has Time Machine, it's geared toward individual computer backups and doesn't seem to work reliably in a group setting. Another issue with these workstations is the presence of Vagrant/Virtual Box VMs on the developers' systems. Time Machine and virtual machines typically don't work well unless the VMs are excluded from the backup set. I'd like a push-based backup process with some flexible scheduling options. I know how to handle the backend storage, but I'm not sure on what needs to be presented to the client systems. Due to the nature of the data here, cloud-based backup may not be a viable option. Any suggestions about how you handle this in your environment would be appreciated. Edit: The virtual machine backups are no longer important. They can be excluded from the process and planning.

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