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• New Dell PE R710 - Storage Question

  - by rihatum

  Hi All, Dell PE R710, received from Dell in the following state : Windows Disk 0 1800GB ( Volume C & D ) Windows Disk 1 526 GB (Volume E ) Perc6i Integrated Raid Controller 6 x 500GB Nearline SAS 7200RPM HDDs Raid 5 Configuration with two Virtual Disks I have installed Dell open Manage and it shows the following : Virtual Disk 0 - State : Background Initialization ( 7% ) Virtual Disk 1 - State : Background Initialization ( 25% ) Now when I click on Virtual Disk 0 it shows me all 6 Disks and the same happens when I click on Virtual Disk 1 it displays all 6 disks. But when I click on Storage Perc6i Connector 0 I get 4 Physical disks with the following numbers : Physical Disk 0:0:0 Physical Disk 0:0:1 Physical Disk 0:0:2 Physical Disk 0:0:3 When I click on Storage Perc6i Connector 1 I get 2 Physical Disks Listed in the following way : Physical Disk 1:0:4 Physical Disk 1:0:5 I am a little confused in this description, does this 1:0:4 interprets to Controller1, Disk4. Does this integrated raid card have two controllers coming out of it ? Also, When I first switched on the machine, the boot partition was showing 1GB Available out of 40GB, now its showing 38GB available out of 40GB. Is this because the Virtual Disks are still Initializing ? Any recommendations or suggestions ? Also, this server have 6 x 500GB NearLine SAS Hard drives, what would be a good raid config ? We are planning to use it for Hyper-V with quite a few (7 or 8) virtual servers, your suggestions would be helpful. Also, while the virtual disks are in a initialization state, can I destroy and re-create the raid configuration ? I would have to do it at the BIOS CTRL-M ? Thanks and Regards

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• Dynamically add Server 2008 NLB Nodes

  - by Nick Jacques

  Hi All, I have a small NLB cluster for Terminal Servers. One of the things we're looking at doing for this particular project (this is for a college class) is dynamically creating Terminal Servers. What we've done is create policies for a certain OU, that sets the proper TS Farm properties and installs the Terminal Server role and NLB feature. Now what we'd like to do is create a script to be run on our Domain Controller to add hosts to the preexisting NLB cluster. On our Server 2008 R2 Domain Controller, I was thinking of running the following PowerShell script I've kind of hacked together. Any thoughts on if this will work? Is there any way I can trigger this script to run on the DC once all the scripts to install roles are done on the various Terminal Servers? Thanks very much in advance!! Import-Module NetworkLoadBalancingClusters $TermServs = @() $Interface = "Local Area Connection" $ou = [ADSI]"LDAP://OU=Term Servs,DC=example,DC=com" foreach ($child in $ou.psbase.Children) { if ($child.ObjectCategory -like '*computer*') {$TermServs += $child.Name} } foreach ($TS in $TermServs) { Get-NlbCluster 172.16.0.254 | Add-NlbClusterNode -NewNodeName $TS -NewNodeInterface $Interface }

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• How to completely disable laptop sound?

  - by Alvaro Rodriguez

  I have a HP Pavillion DV7 laptop with win 8 pro. The laptop has an unidentified problem with sound drivers or hardware that sometimes causes volume to constantly jiggle up and down. This is very annoying because of these consequences: Renders mute unusable - as the volume changes the sound unmutes automatically Causes an annoying win 8 "surface UI" notification to appear constantly in the upper left corner, which is distracting enough by itself, but more importantly Renders the whole "surface UI" unusable, because it loses focus whenever the sound changing notification appears When the jiggling happens, the laptop also loses the ability to redirect sound to earphones - sound comes out of the speakers even if earphones are connected. To solve these issues I want to completely disable sound in the laptop (I've tried reinstalling drivers several times to no end). I have tried disabling all sound related drivers and devices in the Device Manager but Windows re-enables those automatically whenever I restart the laptop. The BIOS doesn't have any settings to disable sound hardware either. Please don't suggest having the laptop sound serviced or fixed. It's not worth the expense. I just want to remove sound support so I can use it normally. It is very unusable as it is now.

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• netlogon errors

  - by rorr

  I have two instances of mssql 2005 and am using CA XOSoft replication. The master is a failover cluster and the replica is a standalone server. They are all running Server 2003 sp2 x64. Same patch levels on all servers. This setup has worked great for several months until we recently restricted the RPC ports on both nodes of the master(5000 - 6000 using rpccfg.exe). We have to implement egress filtering, thus the limiting of the ports. We began receiving login errors for sql windows authentication and NETLOGON Event ID: 5719: This computer was not able to set up a secure session with a domain controller in domain due to the following: Not enough storage is available to process this command. This may lead to authentication problems. Make sure that this computer is connected to the network. If the problem persists, please contact your domain administrator. We also see group policies failing to update and cluster file shares go offline at the same time. The RPC ports were set back to default when we started seeing these problems and the servers rebooted, but the problems persist. The domain controllers are not showing any errors. Running dcdiag and netdiag shows everything is fine. We have noticed that the XOSoft service ws_rep.exe is using a lot of handles(8 - 9k), about the same number that sqlserver is using. As soon as xosoft replication is stopped the login errors cease and everything functions correctly. I have opened a ticket with CA for XOSoft, but I'm not sure that the problem is actually xosoft, but that it is the one bringing the problem to light. I'm looking for tips on debugging RPC problems. Specifically on limiting the ports and then reverting the changes.

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• Sticky connection and HTTPS support for HAProxy

  - by Saif

  We have 2 HTTP Load balancer with HAproxy and heartbeat. There are 4 apache nodes in this cluster. It's doing round robin load balancing. The HTTP cluster working fine. We are having problem with our portal because it uses SSO. We need sticky connection support in our HAproxy. Also we need load balancing for HTTPS traffic. Here's our HAproxy conf file. global # to have these messages end up in /var/log/haproxy.log you will # need to: # # 1) configure syslog to accept network log events. This is done # by adding the '-r' option to the SYSLOGD_OPTIONS in # /etc/sysconfig/syslog # # 2) configure local2 events to go to the /var/log/haproxy.log # file. A line like the following can be added to # /etc/sysconfig/syslog # # local2.* /var/log/haproxy.log # log 127.0.0.1 local0 log 127.0.0.1 local1 notice chroot /var/lib/haproxy pidfile /var/run/haproxy.pid maxconn 4000 user haproxy group haproxy daemon # turn on stats unix socket stats socket /var/lib/haproxy/stats #--------------------------------------------------------------------- # common defaults that all the 'listen' and 'backend' sections will # use if not designated in their block #--------------------------------------------------------------------- defaults mode http log global option httplog option dontlognull option http-server-close option forwardfor except 127.0.0.0/8 option redispatch retries 3 timeout http-request 10s timeout queue 1m timeout connect 10s timeout client 1m timeout server 1m timeout http-keep-alive 10s timeout check 10s maxconn 3000 #--------------------------------------------------------------------- # main frontend which proxys to the backends #--------------------------------------------------------------------- frontend main *:5000 acl url_static path_beg -i /static /images /javascript /stylesheets acl url_static path_end -i .jpg .gif .png .css .js use_backend static if url_static default_backend app #--------------------------------------------------------------------- # static backend for serving up images, stylesheets and such #--------------------------------------------------------------------- backend static balance roundrobin server static 127.0.0.1:4331 check #--------------------------------------------------------------------- # round robin balancing between the various backends #--------------------------------------------------------------------- backend app listen ha-http 10.190.1.28:80 mode http stats enable stats auth admin:xxxxxx balance roundrobin cookie JSESSIONID prefix option httpclose option forwardfor option httpchk HEAD /haproxy.txt HTTP/1.0 server apache1 portal-04:80 cookie A check server apache2 im-01:80 cookie B check server apache3 im-02:80 cookie B check server apache4 im-03:80 cookie B check Please advice. Thanks for your help in advance.

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• What is optimal hardware configuration for heavy load LAMP application

  - by Piotr K.

  I need to run Linux-Apache-PHP-MySQL application (Moodle e-learning platform) for a large number of concurrent users - I am aiming 5000 users. By concurrent I mean that 5000 people should be able to work with the application at the same time. "Work" means not only do database reads but writes as well. The application is not very typical, since it is doing a lot of inserts/updates on the database, so caching techniques are not helping to much. We are using InnoDB storage engine. In addition application is not written with performance in mind. For instance one Apache thread usually occupies about 30-50 MB of RAM. I would be greatful for information what hardware is needed to build scalable configuration that is able to handle this kind of load. We are using right now two HP DLG 380 with two 4 core processors which are able to handle much lower load (typically 300-500 concurrent users). Is it reasonable to invest in this kind of boxes and build cluster using them or is it better to go with some more high-end hardware? I am particularly curious how many and how powerful servers are needed (number of processors/cores, size of RAM) what network equipment should be used (what kind of switches, network cards) any other hardware, like particular disc storage solutions, etc, that are needed Another thing is how to put together everything, that is what is the most optimal architecture. Clustering with MySQL is rather hard (people are complaining about MySQL Cluster, even here on Stackoverflow).

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• HA Proxy won't load balance my web requests. What have I done wrong?

  - by Josh Smeaton

  I've finally got HA Proxy set up and running in a way I think I want. However, it is not load balancing the web requests it receives. All requests are currently being forwarded to the first server in the cluster. I'm going to paste my configuration below - if anyone can see where I may have gone wrong, I'd appreciate it. This is my first stab at configuring web servers in a *nix environment. First up, I have HA Proxy running on the same host as the first server in the apache cluster. We are moving these servers to virtual later on, and they will have different virtual hosts, but I wanted to get this running now. Both web servers are receiving their health checks, and are reporting back correctly. The haproxy?stats page correctly reports servers that are up and down. I've tested this by altering the name of the file that is checked. I haven't put any load onto these servers yet. I've just opened up the URLs on several tabs (private browsing), and had several co-workers hit the URL too. All of the traffic goes to WEB1. Am I balancing incorrectly? global maxconn 10000 nbproc 8 pidfile /var/run/haproxy.pid log 127.0.0.1 local0 debug daemon defaults log global mode http retries 3 option redispatch maxconn 5000 contimeout 5000 clitimeout 50000 srvtimeout 50000 listen WEBHAEXT :80,:8443 mode http cookie sessionbalance insert indirect nocache balance roundrobin option httpclose option forwardfor except 127.0.0.1 option httpchk HEAD health_check.txt stats enable stats auth rah:rah server WEB1 10.90.2.131:81 cookie WEB_1 check server WEB2 10.90.2.130:80 cookie WEB_2 check

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• NetBackup prefers "Scratch" tapes over dedicated tapes

  - by wfaulk

  I have a NetBackup 6.0MP7 installation running on Windows Server 2003. It functions as the only Master Server and Media Server. I swap a full set of tapes in and out every week, but leave a set of tapes with their Volume Pool set to "Scratch" in all the time. The weekly tape sets then get rotated back in after a period of time. Largely, this works fine. I seldom actually need the scratch tapes, but every once in a while, a backup will run over what I have dedicated to the task. However, one week's set of tapes consistently gets declined in favor of the scratch pool. The backup policies are the same for every week, they all have "Policy Volume Pool" set to "NetBackup", and all of the tapes for every week (beside the scratch tapes) have had their pools assigned as "NetBackup", definitely including the week that always gets ignored. That said, it doesn't ignore all of the NetBackup pool tapes for that week. It does usually write to two or three of them, but it writes to like 20 of the scratch tapes. (I haven't thought to look to see if it's always the same two or three tapes.) And this problem never seems to occur for any other week. It doesn't load the tapes and then reject them; it never seems to try to use them at all. They are not flagged as frozen. They are all active and unassigned when I swap them in. The tapes are in a Quantum PX510 tape library. The NetBackup server is attached to the library/robot via fibrechannel going through an HP-branded Brocade switch. I'm not an expert on NetBackup at all. I don't really even know where to look. Any advice on logs to look at or logging to enable or really anything at all would be appreciated. I'll keep an eye on the question and update it if anyone needs any more info to help.

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• Looking for a comprehensive/"expert" guide to BCD parameters

  - by Stilez

  I'm interested in educating myself about BCD on Windows 8. There are many, many "walkthrough" guides" and "howtos", but I can't find any guides at typical "enthusiast" level covering what each option or argument in a BCD /ENUM dump might mean, and the principles governing how these all work together. Imagine trying to rebuild or debug BCD (including EFI/BIOS variants and recovery/hibernate/memtest sections, and perhaps multiple boot Windows/WinPE/WinRE) from scratch using just BCDedit + DiskPart, and trying to understand rather than just copy/pasting commands. That's roughly the knowledge I'm after. Example questions might be: How is a BCD /ENUM dump to be read, item by item? How do its sections work together? (A lot of guides only show a specific example rather than explaining all the all common args that can exist and what they mean, they don't actually explain how sections work together, or they assume MBR/BIOS/Vista/7 and omit info needed for EFI/GPT/Dynamic disks/8) Partitions are specified by volume letter or as a \Device\HarddiskVolumeNNN. Why does it sometimes show these items as a letter and sometimes as a GUID? What are the practical differences if any? What exactly is syntax like "ramdisk=[C:]\Images\winpe.wim,{ramdiskoptions}" saying, and how will the drive letter "C" be interpreted at runtime in a line like this? Is the drive in such a line always "C:" (most examples assume so) and if not, when wouldn't it be? Many websites state that an sdi device and path may be needed in some sections of BCD, but what is sdi and what are these args doing when they appear? How does the GUID to HDD volume/partition mapping work under EFI/GPT? So that if disks or partitions/volumes change it's clear how one can confirm from basic principles whether data shown in BCD /ENUM ALL is still correct or not. Does anyone know of a suitable reference source for this kind of raw BCD data and structures? Thanks!

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• QuickTime Player sounds much better than iTunes

  - by Gene Goykhman

  I am playing a 320 kpbs encoded music MP3 in iTunes and the sound is substantially worse than the exact same file played back in QuickTime Player (Max OS X 10.8.5). I have maxed out system volume and iTunes playback volume. I have disabled all the audio processing features in iTunes (equalization, sound enhancer, etc.) The audio coming from iTunes still sounds resampled and/or processed, whereas QuickTime Player appears to be playing it "as is". Even when I Get Info on the MP3 file in Finder and play it back directly from the Get Info window it sounds good. It's just iTunes that seems to be mangling the song. I can notice a difference on virtually all my music, so it's not just one particular MP3. I suspect the issue is that iTunes is doing some kind of audio processing but I can't find a way to turn it off. This is the newest iTunes (11.1), but the problem has probably been going on for a while... I just switched to decent earbuds and started noticing the difference. What's the best way to force iTunes to play back the file as-is, or as close as possible to how QuickTime Player/Finder would play it?

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• Using mixed disks and OpenFiler to create RAID storage

  - by Cylindric

  I need to improve my home storage to add some resilience. I currently have four disks, as follows: D0: 500Gb (System, Boot) D1: 1Tb D2: 500Gb D3: 250Gb There's a mix of partitions on there, so it's not JBOD, but data is pretty spread out and not redundant. As this is my primary PC and I don't want to give up the entire OS to storage, my plan is to use OpenFiler in a VM to create a virtual SAN. I will also use Windows Software RAID to mirror the OS. Partitions will be created as follows: D0 P1: 100Mb: System-Reserved Boot D0 P2: 50Gb: Virtual Machine VMDKs for OS D0 P3: 350Gb: Data D1 P1: 100Mb: System-Reserved Boot D1 P2: 50Gb: Virtual Machine VMDKs for OS D1 P3: 800Gb: Data D2 P1: 450Gb: Data D3 P1: 200Gb: Data This will result in: Mirrored boot partition Mirrored Operating system Mirrored Virtual machine O/S disks Four partitions for data In the four data partitions I will create several large VMDK files, which I will "mount" into OpenFiler as block-storage devices, combined into three RAID arrays (due to the differing disk sizes) In effect, I'll end up with the following usable partitions SYSTEM 100Mb the small boot partition created by the Windows 7 installer (RAID-1) HOST 50Gb the Windows 7 partition (RAID-1) GUESTS 50Gb Virtual machine Guest VMDK's (RAID-1) VG1 900Gb Volume group consisting of a RAID-5 and two RAID-1 VG2 300Gb Volume group consisting of a single disk On VG1 I can dynamically assign storage for my media, photographs, documents, whatever, and it will be safe. On VG2 I can dynamically assign storage for my data that is not critical, and easily recoverable, as it is not safe. Are there any particular 'gotchas' when implementing a virtual OpenFiler like this? Is the recovery process for a failing disk going to be very problematic? Thanks.

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• (solved) `ssh foo "<command/>"` not loading remote aliases?

  - by TomRoche

  summary: Why does this fail $ ssh foo 'R --version | head -n 1' bash: R: command not found but this succeeds $ ssh foo 'grep -nHe 'bashrc' ~/.bash_profile' /home/me/.bash_profile:3:# source the users .bashrc if it exists /home/me/.bash_profile:4:if [ -f "${HOME}/.bashrc" ] ; then /home/me/.bash_profile:5: source "${HOME}/.bashrc" $ ssh foo 'grep -nHe "\WR\W" ~/.bashrc' /home/me/.bashrc:118:alias R='/share/linux86_64/bin/R' $ ssh foo '/share/linux86_64/bin/R --version | head -n 1' R version 2.14.1 (2011-12-22) ? details: I am a (rootless) user on 2 clusters. One uses environment modules, so any given server on that cluster can provide (via module add) pretty much the same resources. The other cluster, on which I must also unfortunately work, has servers managed individually, so I get in the habit of doing, e.g., EXEC_NAME='whatever' for S in 'foo' 'bar' 'baz' ; do ssh ${SERVER} "${EXEC_NAME} --version" done This works fine for packages installed normally/consistently, but often (for reasons unknown to me) packages are not: e.g. (compare alias below to alias above), $ ssh bar 'R --version | head -n 1' bash: R: command not found $ ssh bar 'grep -nHe 'bashrc' ~/.bash_profile' /home/me/.bash_profile:3:# source the users .bashrc if it exists /home/me/.bash_profile:4:if [ -f "${HOME}/.bashrc" ] ; then /home/me/.bash_profile:5: source "${HOME}/.bashrc" $ ssh bar 'grep -nHe "\WR\W" ~/.bashrc' /home/me/.bashrc:118:alias R='/share/linux/bin/R' $ ssh bar '/share/linux86_64/bin/R --version | head -n 1' R version 2.14.1 (2011-12-22) Using aliases copes well with these install differences when I interactively shell into the server, but fails when I try to script ssh commands (as above); i.e., # interactively $ ssh foo ... foo> R --version calls my alias for R on remote host=foo, but # scripting $ ssh foo 'R --version' doesn't. What do I need to do to make ssh foo "<command/>" load my aliases on the remote host?

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• 0 connected nodes in datastax opscenter

  - by gansbrest

  Installed opscenterd on the separate node outside of the cluster, but within firewall ( aws security group ). Tested all possible ports between agents and opcenter server. No errors in the log.. 2013-10-30 01:07:23+0000 [FC_Cluster] INFO: Initializing event storage. 2013-10-30 01:07:23+0000 [FC_Cluster] INFO: Attempting to load all persisted alert rules 2013-10-30 01:07:23+0000 [FC_Cluster] INFO: Done loading persisted alert rules 2013-10-30 01:07:23+0000 [FC_Cluster] INFO: Done initializing event storage. 2013-10-30 01:07:23+0000 [FC_Cluster] INFO: Done loading persisted scheduled job descriptions 2013-10-30 01:07:23+0000 [FC_Cluster] INFO: OpsCenter starting up. 2013-10-30 01:07:23+0000 [] INFO: Finished starting new cluster services for FC_Cluster 2013-10-30 01:08:04+0000 [FC_Cluster] INFO: Agent for ip 10.34.10.185 is version u'3.2.2' 2013-10-30 01:08:04+0000 [FC_Cluster] INFO: Agent for ip 10.32.37.251 is version u'3.2.2' 2013-10-30 01:08:04+0000 [FC_Cluster] INFO: Agent for ip 10.82.226.252 is version u'3.2.2' The most interesting part that I can see some data in the opscenter UI, when I stop agents, there is no data displayed, when I start - it show up again, but at the same time it shows 0 connected nodes. Storage capacity is even funnier - 3 of 0 nodes.. Any ideas why that could be happening?

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• Syncronization between folders MAC OS Lion

  - by Andre Carvalho

  I have an iMac at home and I use a Macbook pro for work. I also have a time capsule at home containing my main folder with my main files. I use it as a NAS besides the Time Machine backup tool. I have several personal files I need to be accessing both at home and at work. My wife, who works at home, uses sometimes the same .XLS files and .DOC files I might have used during my day at work, away from home. My question is: Is there a software, or tool that a I can use to sync my iMac and my MB Pro folders? Remembering that: There might be a chance that my wife and I have changed the same files during the day, so the files would have to be merged so none of the information added by either me or my wife would be lost. The software/tool that would be installed on the MB Pro would need to mount the Time Capsule volume so it could locate the main folder on it. It has to be done automatically when my MB is at home ( with a schedule option ); I have tested some softwares like synctwofolders and Chronosync but none fulfilled all my needs. The first couldn't mount the Time Capsule Volume and didn't have the many schedule options. I really liked Chronosync, but it doesn't merge the files. When it detects a conflict ( for instance: my wife changed a .DOC file on the iMAC and I changed the same file on the MB it asks you to choose which version you want to keep instead of allowing you simply to merge them ). I don't have much experience with automator or scripts but maybe you can give me a hand with that.

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• Safe mode boot with no change on screen but ongoing hard disk activity - why?

  - by omatai

  I have a machine with a dying hard drive - bad sectors are starting to multiply :-( The first sign (24 hours ago) was that it had an unmountable boot volume. At this time, I tried booting to safe mode with command prompt, which worked, after which I rebooted normally and ran a chkdsk. It has since been working as well as I could expect, but slowly getting less reliable. So I scheduled another chkdsk on both partitions (C: - boot, D: - data), having freed up a lot of space on both partitions to give Windows a little more scope for repairs (hopefully?). I then rebooted. On reboot, it protested about the unmountable boot volume again, so I booted to safe mode. I got the same list of drivers loaded as yesterday, and then no change to the screen for the past 2 hours. However, I see a flickering hard drive indicator light - not always on, but seldom ever off. What is happening? Is the chkdsk that runs in safe mode one which produces nothing on the screen and so chkdsk could be doing its thing... or is Windows still trying (but failing) to boot into Safe Mode?

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• Windows XP consuming drive letters

  - by billdehaan

  This one's a bit of a stumper. I'm running XP SP3, current with all fixes, etc. My problem is that I can assign a drive letter to a container file (explained below), it works just fine. But once I close the container, the drive letter is no longer available until the next boot. I've got some confidential data that I've placed in a container volume. I've used TrueCrypt (www.truecrypt.com) and FreeOTFE (www.freeotfe.org), with both installed and portable versions for both, with the same result. I open the container file, assign it to a drive letter (say R:), and run some portable apps that are within the volume. When I'm done, I close the container, and the drive letter is released. Fine so far. However, when I attempt to re-open it, the previous drive letter (in this case R:) is no longer available. It's not mapped to anything, it's just unavailable. Even attempting something like "subst R: C:\" returns "Invalid Parameter - R:". I can use the S: drive, no problem, but the next day I have to use T:, then U:, etc. Eventually, I have to reboot to reclaim all of of the drive letters. Unfortunately, everything I've read about drive letters relates to USB assignments, which doesn't apply here. I've tried the "show hidden" command (set devmgr_show_nonpresent_devices=1) with no success. And the Disk Management tool doesn't apply either, since it's not a physical drive. Does anyone know where Windows keeps the list of drive letters? And is there anything short of a reboot that can be used to reset it?

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• Can't access my accelerated hard disk from msdos after installing linux on ssd cache

  - by Chibueze Opata

  I mistakenly installed Linux Mint on my ssd (forgot my PC actually came with one), when it detected a ~31GiB disk that it wanted to install to, I was a bit confused since I had brought out 30Gb in my primary disk for it, but I clicked continue. After installation, I tried to boot back into my Windows and it brought out some Intel Raid Disk Utility stuff saying I should disable acceleration on a disk something couldn't be found, I canceled it but whatever I tried, recovery tools, setups etc, I couldn't just access the drive which was apparently using the SSD as cache. Since then I've been stuck. I tried setting the 'raid' flag to the disk from 'gParted', still I couldn't. I tried the diskraid utility from windows recover disk, it said it couldn't detect any raid, diskpart sees the partition but doesn't see the volume, when I remove the raid flag, it sees the volume as one of raw type, and I can't access anything. I can however mount the drive from terminal in Mint and access my files, but I don't have any backup media at the moment so I can do a factory re-install. Please how do I go about solving the issue, precisely I would like to know how to boot into the drive again. Thanks!

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• Moving MySQL directory on an Amazon EC2 machine

  - by Traveling Tech Guy

  I'm trying to have MySQL point to a directory on an EBS volume I mounted on my EC2 machine. I took th following steps: Stopped MySQL (/etc/init.d/mysqld stop) - successful Created a MySQL directory on my volume, mounted on /vol (mkdir /vol/mysql) Copied the contents of /var/lib/mysql to /vol/mysql (cp -R /var/lib/mysql /vol/mysql) Chanded the owner and group of that directory to match the original (chown -R mysql:mysql /vol/mysql) - after this step, the 2 directories are identical. Edited the /etc/my.cnf file (commented 2 original lines): [mysqld] #datadir=/var/lib/mysql #socket=/var/lib/mysql/mysql.sock datadir=/vol/mysql socket=/vol/mysql/mysql.sock` Started MySQL (/etc/init.d/mysqld start) - FAILED The error file /var/log/mysqld.log contains the following lines: 100205 20:52:54 mysqld started 100205 20:52:54 InnoDB: Started; log sequence number 0 43665 100205 20:52:54 [Note] /usr/libexec/mysqld: ready for connections. Version: '5.0.45' socket: '/vol/mysql/mysql.sock' port: 3306 Source distribution No other errors are available. What am I doing wrong? Where can I find the error/s encountered by MySql? If I restore the original lines, MySQL starts, leading me to believe it may be a permissions issue - but permissions are the same for both directories? Thanks!

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• Creating RAID1 on Windows Server causes not enough disk space error

  - by northpole

  I have three disks. Disk0 (boot), Disk1 and Disk2. Disk 1 and 2 are both unformatted and unallocated drives. I am trying to mirror Disk0 to Disk1. They are both Dynamic and are both the same size (1TB). When I select Disk1 to be the mirror I get the error "There is not enough space available on the disk(s) to complete this operation". I have spent several hours searching for a solution but have not found one. Why do I get this error when they are both the same size? EDIT: Shrinking the volume size on the boot disk by 100MB allowed me to get past this error. From what I read the mirror drive needs to be the same size or larger than the boot drive. So I am confused why that change worked. However, I now get the error " all disks holding extents for a given volume must have the same sector size and the sector size must be valid". I believe this is because the drives are different and one has 512B and the other is the Advanced Drive that is 4KB. What the different sector sizes cause both problems? If I got the same disks would both issues go away?

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• Getting started with webserver clustering.

  - by Ernie

  I work for a small ISP, and we host about 250 domains and all the stuff that goes along with that: DNS, mail, spam filtering, and backups. Currently, we have separate DNS servers (two of them) and mail servers (outgoing mail is actually on the secondary DNS server, but was previously on its own server). In the past, this was done as an insurance measure. The last thing we need is for some doofus (usually yours truly) to hose a server, taking out DNS and mail right along with it, or for spammers to jam our incoming SMTP server, preventing outgoing mail from being sent too. In the past, this was a problem, and our servers were set up the way they are now to combat it. However, clustering solutions like Sun's Cobalt RAQ (in days of olde) and Virtualmin appear to cater to an all-in-one approach, then deal with failures through redundant servers. I have avoided this thus far, but we've been using Virtualmin on our web server for a while now, and I'd like to expand into using it for a high availability cluster. Our networking partner has recently built a datacenter that has eliminated all of our other bugaboos like network, cooling, and power issues, so now the only thing left to go wrong is me hosing a server, which happened earlier this month. One of the bigger reasons we've avoided going this route is because our hardware requirements aren't particularly high. One server easily handles all the sites we host (most of them are flat sites). Also, load-balancing routers tend to be expensive and complicated. All that I'm really expecting to do is building a two-node cluster for redundancy so that when I hose a server (however rare that might be), we're not out for 8-12 hours while I rebuild it. What I need to know is how to get started, and if I'm really in a position to bother with this kind of thing at all.

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• Debian software raid 1: boot from both disk

  - by bsreekanth

  I newly installed debian squeeze with software raid.The way I did was, as also given in this thread. I have 2 HDD with 500 GB each. For each of them, I created 3 partitions (/boot, / and swap) I selected the hard drive and created a new partition table I created a new partition that was 1GB. I then specified to use the partition as a Physical Volume for RAID. and used for /boot and enabled bootable. Created another partition, which is of 480 GB, and then specified to use the partition as a Physical Volume for RAID. and used for /. Created another partion and used for swap Then RAID configuration: Through Configure RAID menu - create MD device - (2 for the number of drives, 0 for spare devices) Next select the partitions you want to be members of /dev/MD0. I selected /dev/sda1 and /dev/sdb1 (for /boot) Next select the partitions you want to be members of /dev/MD1. I selected /dev/sda6 and /dev/sdb6 (for /) And no RAID for swap partitions 'Finish Partitioning and write changes to disk' -- Finish the rest of the install like normal Everything is ok now, except I am not sure how to test my raid config. When I pull the power of the HDD, it only boots from one disk. I read in some forum that I may have to install GRUB manually on the other. In Debian Squeeze, there is no grub command. Not sure how to make my software raid bootable from both disk. Also, please comment on my steps above. Anything unusual. I configured /boot partitions of both disks to be boot=yes. Not sure whether that is ok. Thanks, Bsr

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• Can't mount FAT32 drive under Ubuntu Linux

  - by Josh

  I have a 320GB USB drive with a single large FAT32 partition. The volume mounts perfectly fine on my Mac OS X 10.5.8 machine and Disk Utility on the mac reports no issues with the volume. I can read/write all data on the drive. However when I connect the drive to my Ubuntu 9.10 Karmic system, the partition does not mount. dmesg|tail says: [ 2752.334822] scsi3 : SCSI emulation for USB Mass Storage devices [ 2752.335040] usb-storage: device found at 3 [ 2752.335044] usb-storage: waiting for device to settle before scanning [ 2757.330301] usb-storage: device scan complete [ 2757.331005] scsi 3:0:0:0: Direct-Access WD 3200AAK External 1.65 PQ: 0 ANSI: 0 [ 2757.331772] sd 3:0:0:0: Attached scsi generic sg2 type 0 [ 2757.355647] sd 3:0:0:0: [sdb] 625142448 512-byte logical blocks: (320 GB/298 GiB) [ 2757.360737] sd 3:0:0:0: [sdb] Write Protect is off [ 2757.360749] sd 3:0:0:0: [sdb] Mode Sense: 00 00 00 00 [ 2757.360755] sd 3:0:0:0: [sdb] Assuming drive cache: write through [ 2757.367618] sd 3:0:0:0: [sdb] Assuming drive cache: write through [ 2757.367631] sdb: sdb1 [ 2762.797622] sd 3:0:0:0: [sdb] Assuming drive cache: write through [ 2762.797636] sd 3:0:0:0: [sdb] Attached SCSI disk [ 2822.866228] FAT: bogus number of reserved sectors [ 2822.866237] VFS: Can't find a valid FAT filesystem on dev sdb1. When I run fsck.vfat -a /dev/sdb1 I get: root@cartman:~# fsck.vfat -a /dev/sdb1 dosfsck 3.0.3, 18 May 2009, FAT32, LFN Logical sector size is zero. Googling "vfat Logical sector size is zero" produced no consensus as to the solution. I would prefer not to have to completely reformat the disk if possible because it contains about 280GB of data I would rather not have to find a temporary home for. Any suggestions?

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• Trying to delete a directory stored on a WIndows server, mounted on a mac

  - by AdamG

  I am trying to delete a directory stored on a Windows 2008 R2 server, mounted on a Mac as network home (10.8.5). The directory was created by Safari and stores temporary internet files. I need to be able to delete this folder on logout from a Mac bash script. The Terminal on Mac shows the directory as empty: 36W-FacRm-02:History lwickham$ cd /home/lwickham/Library/Caches/Metadata/Safari/History 36W-FacRm-02:History lwickham$ ls -al total 0 drwx------ 1 lwickham CGPS\Domain Users 264 Nov 8 09:24 . drwx------ 1 lwickham CGPS\Domain Users 264 Nov 8 09:28 .. However, on the Windows server it has a single 0kb file that doesn't start with a "." but yet is invisible to the Mac. E:\FacultyHome2\lwickham\Library\Caches\Metadata\Safari\History>dir Volume in drive E is FacultyUsers2 Volume Serial Number is 8C17-4EF3 Directory of E:\FacultyHome2\lwickham\Library\Caches\Metadata\Safari\History 11/08/2013 09:24 AM <DIR> . 11/08/2013 09:24 AM <DIR> .. 11/07/2013 04:28 PM 0 http?%2F%2Fwww.google.com%2Furl?sa=t&rct= j&q=&esrc=s&source=web&cd=6&ved=0CFsQFjAF&url=http%253A%252F%252Fwww.usbanklocat ions.com%252Fhsbc-bank-usa-96th-street-branch.html&ei=5vR7UtmXEPjfsATe0YCIBA&usg =AFQjCNF9ypKbpYbXRng00FY3W8Y6cF1Tiw&bvm=bv.56146854,d. 1 File(s) 0 bytes 2 Dir(s) 514,231,967,744 bytes free All my attempts to delete the dir from the Mac have failed: 36W-FacRm-02:History lwickham$ rm -fr /home/lwickham/Library/Caches/Metadata/Safari/History/* 36W-FacRm-02:History lwickham$ rm -frd /home/lwickham/Library/Caches/ rm: /home/lwickham/Library/Caches//Metadata/Safari/History: Directory not empty rm: /home/lwickham/Library/Caches//Metadata/Safari: Directory not empty rm: /home/lwickham/Library/Caches//Metadata: Directory not empty rm: /home/lwickham/Library/Caches/: Directory not empty

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• Static noise in headphones

  - by John Murdoch

  I have a Asus P6T based system. I was using the on-board sound (plugging in Logitech X-230 2.1 analog speakers in the green "front speakers" 3.5mm analog output, then plugging in my headphones in that). I was quite happy with the sound quality (didn't hear any static noise if volume was turned down to my normal listening level). Then about a week ago I started having terrible static noise from the left channel, and no normal audio on that left channel. Right channel had more static noise than usual but did have a bit of sound. I tried using the AC'97 in front of my case but that seemed to have no signal. I decided my on-board sound card has gone bad and bought an internal sound card to replace it (Startech 7.1Ch PCI). This fixed the "no sound from left channel problem", but I had much more audible static noise. I decided the card was low quality and/or it had interference from all the other things happening inside the computer case, and bought a Sweex SC016 external USB sound card. But even with that I have static noise in headphones. Positioning the USB sound card differently doesn't seem to help. Trying the other analog outputs (e.g., surround) doesn't help. The static noise in all cases is proportional to the volume. I have tried different headphones, but the situation is situation though perhaps the flavour of the static noise changes slightly. So what are my options? a) Get another, more expensive, external USB sound card hoping the quality will improve? b) Get another, more expensive, internal sound card (PCIe 1x perhaps) hoping the quality will improve? c) Get a dedicated DAC box? d) Get some Hi-Fi earphones? Suggestions? tl;dr - Two different sound cards both still have static noise in headphones.

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• Re-sizing disk partition linux/vm

  - by Tiffany Walker

  I VM Player running a linux guest and I was wanting to know how do I expand the disk? In the VM player I gave more disk space but I am not sure how to mount/expand/connect the new disk space to the system. My old disk space was 14GB [root@localhost ~]# df -h / Filesystem Size Used Avail Use% Mounted on /dev/mapper/VolGroup-lv_root 14G 4.5G 8.2G 36% / Then I expanded it and now I see sda2 which is the new space? [root@localhost ~]# fdisk -l Disk /dev/sda: 128.8 GB, 128849018880 bytes 255 heads, 63 sectors/track, 15665 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x000cd44d Device Boot Start End Blocks Id System /dev/sda1 * 1 64 512000 83 Linux Partition 1 does not end on cylinder boundary. /dev/sda2 64 2611 20458496 8e Linux LVM Disk /dev/mapper/VolGroup-lv_root: 14.5 GB, 14537457664 bytes 255 heads, 63 sectors/track, 1767 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x00000000 Disk /dev/mapper/VolGroup-lv_swap: 6408 MB, 6408896512 bytes 255 heads, 63 sectors/track, 779 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x00000000 Do I need to mount the new space first? resize2fs -p /dev/mapper/VolGroup-lv_root 108849018880 resize2fs 1.41.12 (17-May-2010) The containing partition (or device) is only 3549184 (4k) blocks. You requested a new size of 1474836480 blocks. resize2fs -p /dev/mapper/VolGroup-lv_root 128849018880 resize2fs 1.41.12 (17-May-2010) resize2fs: Invalid new size: 128849018880 [root@localhost ~]# lvextend -L+90GB /dev/mapper/VolGroup-lv_root Extending logical volume lv_root to 103.54 GiB Insufficient free space: 23040 extents needed, but only 0 available [root@localhost ~]# lvextend -L90GB /dev/mapper/VolGroup-lv_root Extending logical volume lv_root to 90.00 GiB Insufficient free space: 19574 extents needed, but only 0 available EDIT: So after trying pvcreate/vgextend nothing has so far worked. I'm guessing the new disk space added from VM Player is not showing up? pvscan PV /dev/sda2 VG VolGroup lvm2 [19.51 GiB / 0 free] Total: 1 [19.51 GiB] / in use: 1 [19.51 GiB] / in no VG: 0 [0 ]

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