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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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• Handle Sysinternals software does not accept -c parameter

  - by Alex

  I am trying to close a handle to a locked file in Windows, using Sysinternals Handle software (http://technet.microsoft.com/en-us/sysinternals/bb896655). First I search for opened handle: handle.exe "C:\Temp" It issues me the following: Far.exe pid: 1144 type: File 2E8: C:\Temp Far.exe pid: 1144 type: File 3A8: C:\Temp Next I run handle.exe with -c parameter. However, whichever number I enter, it does not do anything. I have tried both: 1144, 2E8, 3A8 and 1144 in hex (478) as the software help says it accepts PID in hexademic. Whatever I enter, it just issues the following: Handle v3.46 Copyright (C) 1997-2011 Mark Russinovich Sysinternals - www.sysinternals.com usage: handle [[-a [-l]] [-u] | [-c <handle> [-y]] | [-s]] [-p <process>|<pid>] [name] -a Dump all handle information. -l Just show pagefile-backed section handles. -c Closes the specified handle (interpreted as a hexadecimal number). You must specify the process by its PID. WARNING: Closing handles can cause application or system instability. -y Don't prompt for close handle confirmation. -s Print count of each type of handle open. -u Show the owning user name when searching for handles. -p Dump handles belonging to process (partial name accepted). name Search for handles to objects with <name> (fragment accepted). No arguments will dump all file references. What am I doing wrong?

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• prevent filesystem from entering read-only mode

  - by user788171

  I have found that my server's filesystem is continuously entering read-only mode. There have been some issues with the raid1 array, but I have removed the bad disk from the array. However, it is still physically plugged into the system because I haven't had a chance to go over to the datacentre, I suspect udev and the system kernel is still picking up the bad disk and throwing errors. In /var/log/messages, there are errors like this: Mar 2 06:53:14 nocloud kernel: ata1: exception Emask 0x10 SAct 0x0 SErr 0x4010000 action 0xe frozen Mar 2 06:53:14 nocloud kernel: ata1: irq_stat 0x00400040, connection status changed Mar 2 06:53:14 nocloud kernel: ata1: SError: { PHYRdyChg DevExch } Mar 2 06:53:14 nocloud kernel: ata1: hard resetting link Mar 2 06:53:20 nocloud kernel: ata1: link is slow to respond, please be patient (ready=0) Mar 2 06:53:21 nocloud kernel: ata1: SATA link up 3.0 Gbps (SStatus 123 SControl 300) Mar 2 06:53:21 nocloud kernel: ata1.00: configured for UDMA/133 Mar 2 06:53:21 nocloud kernel: ata1: EH complete This happens fairly randomly throughout the day until eventually the filesystem becomes read-only. When this happens, my system becomes non-operational which kind of defeats the purpose of having a raid1. Note, ata1 is the bad disk (I think ata1 corresponds to /dev/sda because they are both first in line). Under mdadm, /dev/sda1,2 is no longer being used, but I can't prevent the system kernel from continuing to query that disk when I am no longer using it and throwing these errors. Is there a way to prevent my filesystem from automatically going into read-only mode? Furthermore, is it safe to do so? Thanks in advance. EDIT: Additional information: output from cat /proc/mdstat md1 : active raid1 sdb2[1] 976554876 blocks super 1.1 [2/1] [_U] bitmap: 5/8 pages [20KB], 65536KB chunk md0 : active raid1 sdb1[1] 204788 blocks super 1.0 [2/1] [_U] Output from mount: /dev/mapper/VolGroup-LogVol00 on / type ext4 (rw,noatime) proc on /proc type proc (rw) sysfs on /sys type sysfs (rw) devpts on /dev/pts type devpts (rw,gid=5,mode=620) tmpfs on /dev/shm type tmpfs (rw,rootcontext="system_u:object_r:tmpfs_t:s0") /dev/md0 on /boot type ext4 (rw) none on /proc/sys/fs/binfmt_misc type binfmt_misc (rw) sunrpc on /var/lib/nfs/rpc_pipefs type rpc_pipefs (rw) EDIT2: pvdisplay output: --- Physical volume --- PV Name /dev/md1 VG Name VolGroup PV Size 931.32 GiB / not usable 2.87 MiB Allocatable yes (but full) PE Size 16.00 MiB Total PE 59604 Free PE 0 Allocated PE 59604

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• Add Mirror for volumes other than the last one in Windows 7 (disk "not up-to-date")

  - by rakslice

  I'm using Windows 7 x64 Ultimate. I have an existing 4TB disk with 3 NTFS volumes, a new 3TB blank disk, and I'm trying to mirror the volumes onto the new disk. My Windows install is on an SSD which is Disk 0. The 4TB disk with volumes is Disk 1, and the new blank disk is Disk 2. I can add a mirror successfully for the last volume, but when I try to add a mirror for the first volume I immediately get errors (see below). Is there something I special I need to do to add a mirror for a volume other than the last one? More info: I opened Disk Management, right-clicked on the first volume on the existing disk, went to Add Mirror, and selected the new disk. The first time I did this I was prompted to convert the new disk to a Dynamic Disk, which I approved. Subsequently I got a message: The operation failed to complete because the Disk Management console view is not up-to-date. Refresh the view by using the refresh task. If the problem persists close the Disk Management console, then restart Disk Management or restart the computer. I've refreshed disk management, restarted the computer, and converted the new disk to basic and back to dynamic, but I still get that error message. Looking around for suggestions of a workaround, I saw a suggestion to use the diskpart command line tool. Running diskpart from the Start Menu as Administrator, I did select volume 2 (the first volume I want to mirror) and then add disk 2 (the new disk), and received a somewhat similar error: Virtual Disk Service error: The disk's extent information is corrupted. DiskPart has referenced an object which is not up-to-date. Refresh the object by using the RESCAN command. If the problem persists exit DiskPart, then restart DiskPart or restart the computer. A rescan appears to be successful: DISKPART> select disk 2 Disk 2 is now the selected disk. DISKPART> rescan Please wait while DiskPart scans your configuration... DiskPart has finished scanning your configuration. but attempting to add the mirror again resulted in the same error. The only similar report I found online was this: http://www.sevenforums.com/hardware-devices/335780-unable-mirror-all-but-last-partition-drive.html Based on that I attempted to mirror the last volume on the disk to the new disk using diskpart, and that started successfully -- it is currently resynchronizing. More Background: In the course of dealing with a failing 3TB hard drive, I bought a replacement 4TB drive and installed it, then copied the partitions from the failing drive to it using Minitool Partition Wizard Home, and then removed the failing drive and was up and running again normally. Now I've received a warranty replacement for the failing drive, and installed it, and now I'm attempting to mirror my partitions to it.

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• Dell R910 with Integrated PERC H700 Adapter

  - by Alex

  I am in the process of designing an architecture based around a single Dell R910 server running Windows Server 2008 Enterprise. I would like the server to have 8 RAID1 pairs of spinning disks, so I intend to implement: Dell R910 Server Integrated PERC H700 Adapter with 1 SAS expander on each SAS connector (so 8 expanders in total) 7 RAID1 pairs of 143Gb 15K HDD, each paired on one connector using an expander 1 RAID1 pair of 600Gb 10K HDD, paired on the remaining connector using an expander My main concern is not to introduce bottlenecks in this architecture, and I have the following questions. Will the PERC H700 Adapter act as a bottleneck for disk access? Will using SAS expanders for each RAID1 pair cause a bottleneck or would this be as fast as pairing disks directly attached to the SAS connectors? Can I mix the disks, as long as the disks in each RAID1 pair are the same? I assume so. Can anyone recommend any single-to-double SAS Expanders that are known to function well with the H700? Cheers Alex

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• Application to automate Windows software installation in a test lab

  - by Marc

  I have several test environments (hyper-V) which contain a variety of windows servers. Each machine needs periodically rolling back to a given snapshot and then re-installing with the latest version of our software to test. The software installs are quite complex MSI's with a fair few option screens. I know that the installs can be driven from the command line, passing in parameters to override the wizard options. At the simplest level I suppose I could just write a batch file to kick off each install with the required parameters, however the values that are passed in do need to change from time to time (and environment to environment) so a tool with a config file and simple GUI seems like a better idea. I think what makes it slightly more painful is the multiple environments. For example one environment might contain 4 servers and need a config file with all the server names, service endpoints etc. Another environment might be a 1-box install with all names and endpoints set to localhost. So, ideally I want to be able to store different setup configurations and use them to run all the required installers with the relevant settings against the relevant machines. Before I go off to write the thing, does anyone know of an existing, simple, free tool that will let me achieve this?

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• Openfiler crashing without cause or leaving any log messages

  - by user44725

  So my linux machine keeps crashing, without so much as a bye or a leave. I've tried and tried and failed again to work out whats happening. Any help would be much appreciated. Linux chai 2.6.29.6-0.24.smp.gcc3.4.x86_64 #1 SMP Tue Mar 9 05:06:08 GMT 2010 x86_64 x86_64 x86_64 GNU/Linux Openfiler Here is what the /var/log/messages file says at the time of the latest crash. Nothing that unusual - just greg logging in and out via samba. You'll notice there is a cron running for root every minute - ignore this - this isn't the issue either it was some check I've been doing to discover its problem. Jun 2 10:32:01 chai crond(pam_unix)[16529]: session closed for user root Jun 2 10:32:49 chai samba(pam_unix)[15454]: session opened for user greg by (uid=0) Jun 2 10:33:01 chai crond(pam_unix)[16537]: session opened for user root by (uid=0) Jun 2 10:33:04 chai crond(pam_unix)[16537]: session closed for user root Jun 2 10:41:40 chai syslogd 1.4.1: restart. Jun 2 10:41:43 chai syslog: syslogd startup succeeded That restart was called manually by hand - by clicking the restart button on the box. So basically messages isn't revealing many secrets. dmesg only shows from startup. If there is any output I should paste. Just say when and where and it'll be done. Thanks for your help! Tim

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• Software Diagnostics Tool recommendations for Debugging a Windows 8 freeze

  - by Stuart

  I've had my HP Pavillion dv6 laptop since last November - and it has had 8GB RAM and a 256GB Crucial M4 SSD installed since the start. I use it for software development and it's had a Windows 8 RTM installation since early September. Yesterday I had to give a presentation at a customer site - so used Powerpoint for the first time since installing Win8... since that point my machine has 'frozen' every 2 hours or so after startup. There doesn't seem to be any easy to see reason behind the freeze - the system just freezes, even if I have left it idle with just a desktop there. My immediate suspicion is that the SSD is the mostly likely cause of the problem. I've looked at some of the questions on here - e.g. How do I troubleshoot hardware issues related to a computer freeze/crash? - but don't really want to start taking my laptop apart. Another suspicion is that this might be related to the WiFi adapter (Broadcom 802.11n) since I have noticed that this doesn't seem to play perfectly with things like Hyper-V in Win8. Can anyone recommend any software diagnostic tools that I can run in order to evaluate the health of the SSD or of other parts of the system? Thanks Stuart P.S. I doubt Powerpoint is the cause of this, but I may use it as an excuse never to use it again... More realistically perhaps something got damaged during travel to the customer site?

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• How decode xfs lost+found directory

  - by Satpal

  I have managed to trash my homebrew Nas box (an old hp d530 + 2x 750gb sata soft raid1 + 17gb boot disk with ubuntu server 8.10) I have searched the web and tried to repair the file system but to no avail :( I was thinking that the dirs/files located under the root of the lost+found directory are 64 bit numbers. Is there any way that I could decant the number into binary form, from there reconstruct the directory/file structure. More to the point can anyone point to the information on how xfs inodes are broken down(does that make sense)?

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• Auto-rebuild RAID6 with MDADM

  - by user65632

  Hello everybody, i'm new in this forum, and because I see that a lot of people get helped here, i'll ask my question here! I have a openSUSE 11.3 Linux computer with 5 disks of 1TB (WD enterprise disks) in it. with mdadm I configured an RAID6 device. Now, after a lot of thorough testing, i've noticed that when the computer goes down unsuspectedly it could happen (1 time out of 10) that while booting, the md0 device isn't recognised, and then the machine goes in "recovery mode", which means that i have to 'CTRL + C' it so it can boot to openSUSE. Once in openSUSE i have to readd the drive manually with 'mdadm /dev/md0 --add /dev/sdX'. After this everything works back fine (after resynching). So my question is: Is there a way to auto-rebuild the RAID6 device when there are problems? and how can I stop this "recovery mode" from happening. Because the computer will be in a place I can't go to, to connect a keyboard, 'CTRL + C' it just to get in openSUSE. If you could help me, I would be a very very very! happy man! :-) thanks in advance! Mikhail

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• DVD drive won't work after installing software

  - by Dan

  DVD drive was already region-free but for some reason would not play a certain DVD as it was the "wrong region". This is the first time I've played a DVD on the drive, but I've imported a lot of CDs before and they always worked fine, even CDs bought from the USA (I live in the UK). To get around this, I downloaded a piece of software called "DVD Region Killer". (Clicking the link won't start the download, so go ahead and check it.) After this, the drive isn't recognised. It won't show up in "My Computer", and when I insert a disc it will start to whir but not take action, i.e. iTunes won't recognise that I have put a CD in. In the Device Manager, the drive shows up with a caution-sign. The device status reads: Windows cannot start this hardware device because its configuration information (in the registry) is incomplete or damaged. (Code 19) Disabling, uninstalling and reinstalling does not help. Clearly the software download is the issue, but it is difficult to remove. The only files I can find in Program Files are: C:\Program Files (x86)\Elaborate Bytes\DVD Region Killer which contains a changelog and a HTML document which has no info on uninstalling. It doesn't show up on "Add or Remove Programs", or even as a background process when I press ctrl-alt-del. Apparently it has no interface as such, and can be accessed by an icon in the system tray, (see review in link) but I don't see the icon. If it helps to know, I have a Dell Inspiron running Windows 8 64-bit, and the model of the DVD drive is: MATSHITA DVD+-RW UJ8C2 Thanks in advance.

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• IBM x260m won't boot from PCI SATA card

  - by syrenity

  Hi. We ghosted our old Windows 2003 drive to a new 1TB one, and connected through new PCI SATA card. The x260m server fails to boot with error 1962: "Boot sector not found." When we connect the drive directly to motherboard, it boots fine, so the problem is probably in getting BIOS to boot from the SATA card. Has anyone encountered and solved such issue? EDIT: We tried disabling the on-board Sata controller (Hostraid/SAS?), but there is no such option - only enable, enhanced and compatible. Tried also to chance boot device priority to all possible choices - no luck. Thanks in advance!

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• flashcache with mdadm and LVM

  - by Backtogeek

  I am having trouble setting up flashcache on a system with LVM and mdadm, I suspect I am either just missing an obvious step or getting some mapping wrong and hoped someone could point me in the right direction? system info: CentOS 6.4 64 bit mdadm config md0 : active raid1 sdd3[2] sde3[3] sdf3[4] sdg3[5] sdh3[1] sda3[0] 204736 blocks super 1.0 [6/6] [UUUUUU] md2 : active raid6 sdd5[2] sde5[3] sdf5[4] sdg5[5] sdh5[1] sda5[0] 3794905088 blocks super 1.1 level 6, 512k chunk, algorithm 2 [6/6] [UUUUUU] md3 : active raid0 sdc1[1] sdb1[0] 250065920 blocks super 1.1 512k chunks md1 : active raid10 sdh1[1] sda1[0] sdd1[2] sdf1[4] sdg1[5] sde1[3] 76749312 blocks super 1.1 512K chunks 2 near-copies [6/6] [UUUUUU] pcsvan PV /dev/mapper/ssdcache VG Xenvol lvm2 [3.53 TiB / 3.53 TiB free] Total: 1 [3.53 TiB] / in use: 1 [3.53 TiB] / in no VG: 0 [0 ] flashcache create command used: flashcache_create -p back ssdcache /dev/md3 /dev/md2 pvdisplay --- Physical volume --- PV Name /dev/mapper/ssdcache VG Name Xenvol PV Size 3.53 TiB / not usable 106.00 MiB Allocatable yes PE Size 128.00 MiB Total PE 28952 Free PE 28912 Allocated PE 40 PV UUID w0ENVR-EjvO-gAZ8-TQA1-5wYu-ISOk-pJv7LV vgdisplay --- Volume group --- VG Name Xenvol System ID Format lvm2 Metadata Areas 1 Metadata Sequence No 2 VG Access read/write VG Status resizable MAX LV 0 Cur LV 1 Open LV 1 Max PV 0 Cur PV 1 Act PV 1 VG Size 3.53 TiB PE Size 128.00 MiB Total PE 28952 Alloc PE / Size 40 / 5.00 GiB Free PE / Size 28912 / 3.53 TiB VG UUID 7vfKWh-ENPb-P8dV-jVlb-kP0o-1dDd-N8zzYj So that is where I am at, I thought that was the job done however when creating a logical volume called test and mounting it is /mnt/test the sequential write is pathetic, 60 ish MB/s /dev/md3 has 2 x SSD's in Raid0 which alone is performing at around 800 MB/s sequential write and I am trying to cache /dev/md2 which is 6 x 1TB drives in raid6 I have read a number of pages through the day and some of them here, it is obvious from the results that the cache is not functioning but I am unsure why. I have added the filter line in the lvm.conf filter = [ "r|/dev/sdb|", "r|/dev/sdc|", "r|/dev/md3|" ] It is probably something silly but the cache is clearly performing no writes so I suspect I am not mapping it or have not mounted the cache correctly. dmsetup status ssdcache: 0 7589810176 flashcache stats: reads(142), writes(0) read hits(133), read hit percent(93) write hits(0) write hit percent(0) dirty write hits(0) dirty write hit percent(0) replacement(0), write replacement(0) write invalidates(0), read invalidates(0) pending enqueues(0), pending inval(0) metadata dirties(0), metadata cleans(0) metadata batch(0) metadata ssd writes(0) cleanings(0) fallow cleanings(0) no room(0) front merge(0) back merge(0) force_clean_block(0) disk reads(9), disk writes(0) ssd reads(133) ssd writes(9) uncached reads(0), uncached writes(0), uncached IO requeue(0) disk read errors(0), disk write errors(0) ssd read errors(0) ssd write errors(0) uncached sequential reads(0), uncached sequential writes(0) pid_adds(0), pid_dels(0), pid_drops(0) pid_expiry(0) lru hot blocks(31136000), lru warm blocks(31136000) lru promotions(0), lru demotions(0) Xenvol-test: 0 10485760 linear I have included as much info as I can think of, look forward to any replies.

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• Software/hardware to build video streaming server?

  - by Sasha Yanovets

  I am looking for a video streaming server solution, something like online TV server, with ability to make live broadcasts in the internet. What software could you recommend for that? What kind of hardware it should run on, should be there anything special? I am looking for a solution that could be scaled up to at least 1000 simultaneous users online with good resolution of video. I think it is good to have general answer on what direction to choose. But here more details on my specific case: I just looking for a solution almost from scratch. We have some video content that we've produced, but it is not delivered over internet yet. We do not tied to any particular vendor for now. We want to make 24 hours of steaming three 8 hour blocks with change of content every day. We want the ability to make regular live broadcasts. I guess we will need to have several options of streaming quality (low ~56 kb/s mid ~273 kb/s). Some terms just foreign to me (like play-truncation rate), if you could point out what parameters we should avare of, it would be great. Uplink to the internet is to be determined. We plan to start from something and scale up on the way. If you are already have some kind of media streaming server, just describe its configuration here (hardware, OS, software), peak number of concurrent users it serves. I think it could help people approaching this task.

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• Enterprise class storage best practices

  - by churnd

  One thing that has always perplexed me is storage best practices. Filesystems brag about how they can be petabytes or exabytes in size. Yet, I do not know many sysadmins who are willing to let a single volume grow over several terrabytes. I do know the primary reason behind this is how long it would take to rebuild the array should a drive fail. The more drives in a single LUN, the longer this takes and the greater your risk of losing another drive while the rebuild is taking place. Then there's usage reasons. Admins will carve out a LUN based on how much space they think needs to be allocated to the project. It seems more practical to me for the LUN to be one large array and to use quotas. I understand this wouldn't satisfy every requirement (iSCSI), but I see a lot of NAS systems (NFS) managed this way. I also understand that the underlying volumes can be grown/shrunk as needed quite easily, but wouldn't it be less "risky" to use quotas rather than manipulating volumes and bringing possible data loss into the equation? There may be some other reasons I'm missing, so please enlighten me. Can we not expect filesystems to ever be so large? Are we waiting for the hardware to get faster to cut down on rebuild times?

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• Quickly set up a Windows Server and automatically install and configure software

  - by Chris

  Yesterday I spent far too much time downloading and installing software on Windows Server 2008. I only had to install a simple server for SQL Server 2008 Express using Microsoft's Web Platform Installer, then configure it to enable remote connections. Everything had to be attended, wasting my time. On a Linux system, this would be trivial to automate, but this is Windows. I do this very rarely, but in the future I would like to make this take as little time as possible. I could do a disc image with everything I installed and configured, but is there a better way? I know nothing of advanced deployment techniques on Windows. Ideally I would like to be able to remotely re-install the OS, or have an unattended install (which I know is possible). Any tips to make the software I need easier to and install and configure with minimal interaction necessary would be helpful. I don't expect everything I asked for to be possible and easy to do. Basically, If any part of it can be done quicker or at least without user input, that's what I'm looking for.

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• Reliable backup software for windows network/samba shares.

  - by Eli

  Hi All, I have a Win2003 server that works as a pdc for a number of XP boxes, and a couple related FreeBSD boxes. I need to back up roaming profiles, non-roaming profiles via network shares, local hard drive data, and files on the FreeBSD boxes via samba shares. I have tried Genie Backup Manager and Backup4All pro, and both have excellent features, but both also begin to fail disastrously with more than a few days use. Mostly, the errors seem to have been from the backup catalog getting out of synch with itself. Whatever it is, there is no excuse for a backup software that says it backed up files when it really didn't, or the log saying it backed up exactly the same file 10,000 times in a single run, or flat-out crashing, or any of the other myriad problems I've run into with these. Really sad for products that fill such an important need. Anyway, does anyone know of a backup software that works reliably and can do the following? Scheduled backups for multiple jobs, without a user logged in. Backup from local hard drives or network shares. Incremental backups. Thanks! Edit: Selected solution: I've added my (hopefully final) solution as an answer.

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• Looking for fault-tolerant, multi-CD/DVD burning software

  - by MichaelKay

  A few years back, I saw an open-source application that created fault-tolerant, multi-CD backup sets. The thought was that if a few sectors went bad on one CD, the data could be reconstructed from others similar to a RAID 5 hard-drive setup. I did some searching and I could not find the application again. Does anyone know of a application that works in this manner. It needs to work with both CDs & DVDs. Linux or Windows will be OK.

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• Zpool disk failure - Where am I at?

  - by JT.WK

  After checking the status of one of my zpools today, I was faced with the following: root@server: zpool status -v myPool pool: myPool state: ONLINE status: One or more devices has experienced an unrecoverable error. An attempt was made to correct the error. Applications are unaffected. action: Determine if the device needs to be replaced, and clear the errors using 'zpool clear' or replace the device with 'zpool replace'. see: http://www.sun.com/msg/ZFS-8000-9P scrub: resilver completed after 3h6m with 0 errors on Tue Sep 28 11:15:11 2010 config: NAME STATE READ WRITE CKSUM myPool ONLINE 0 0 0 raidz1 ONLINE 0 0 0 c6t7d0 ONLINE 0 0 0 c6t8d0 ONLINE 0 0 0 spare ONLINE 0 0 0 c6t9d0 ONLINE 54 0 0 c6t36d0 ONLINE 0 0 0 c6t10d0 ONLINE 0 0 0 c6t11d0 ONLINE 0 0 0 c6t12d0 ONLINE 0 0 0 spares c6t36d0 INUSE currently in use c6t37d0 AVAIL c6t38d0 AVAIL errors: No known data errors From what I can see, c6t9d0 has encountered 54 write errors. It seems as though it has automatically resilvered with the spare disk c6t36d0, which is now currently in use. My question is, where exactly am I at? Yes the 'action' tells me to determine whether or not the disk needs replacing, but is this disk currently still in use? Can I replace / remove it? Any explanation would be much appreciated as I'm quite new to this stuff :) update: After following the advice from C10k Consulting, ie detaching: zpool detach myPool c6t9d0 and adding as a spare: zpool add myPool spare c6t9d0 It appears as though all is well. The new status of my zpool is: root@server: zpool status -v myPool pool: myPool state: ONLINE scrub: resilver completed after 3h6m with 0 errors on Tue Sep 28 11:15:11 2010 config: NAME STATE READ WRITE CKSUM muPool ONLINE 0 0 0 raidz1 ONLINE 0 0 0 c6t7d0 ONLINE 0 0 0 c6t8d0 ONLINE 0 0 0 c6t36d0 ONLINE 0 0 0 c6t10d0 ONLINE 0 0 0 c6t11d0 ONLINE 0 0 0 c6t12d0 ONLINE 0 0 0 spares c6t37d0 AVAIL c6t38d0 AVAIL c6t9d0 AVAIL errors: No known data errors Thanks for your help c10k consulting :)

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• should I put my multi-device btrfs filesystem on disk partitions or raw devices?

  - by Glyph

  If I'm going to create a multi-device btrfs filesystem. The official recommendation from the documentation apppears to be to create it on raw devices; i.e. /dev/sdb, /dev/sdc, etc, but this is not explained. Are there any advantages to creating a partition table on these devices first, either GPT or MBR, and then creating the filesystem on /dev/sdb1, /dev/sdc1 et cetera? Does feeding btrfs whole devices have some particular advantage, or are these basically equivalent?

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• Start a ZFS RAIDZ zpool with two discs then add a third?

  - by Doug S.

  Let's say I have two 2TB HDDs and I want to start my first ZFS zpool. Is it possible to create a RAIDZ with just those two discs, giving me 2TB of usable storage (if I understand it right) and then later add another 2TB HDD bringing the total to 4TB of usable storage. Am I correct or does there need to be three HDDs to start with? The reason I ask is I already have one 2TB drive I'm using that's full of files. I want to transition to a zpool but I'd rather only buy two more 2TB drives if I can. From what I understand, RAIDZ behaves similarly to RAID5 (with some major differences, I know, but in terms of capacity). However, RAID5 requires 3+ drives. I was wondering if RAIDZ has the same requirement. If I have to, I can buy the three drives and just start there, later adding the fourth, but if I could start with two and move to three that would save me $80.

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• Can I take a HDD in Raid1 and plug it straight into a different machine?

  - by jacko

  I would assume that I can just take my HDD out of my NAS (in raid1 mirror) and plug it into another enclosure and have it work off the bat but I'd like to make sure... Any ideas? Edit: My current setup is a Netgear ReadyNAS in (hardware) raid1. I'm hoping to replace this with a home theatre type PC (possibly running Ubuntu), and would like to migrate my data without having to do a bulk transfer over my network between the 2 machines. Can anyone confirm the case for the Netgear ReadyNAS?

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• Changed array composition, mdadm --detail still shows the old array size

  - by Prody

  I have a machine with 8 disks. I installed it with my hoster's install automation (it's OVH, I don't have physical access to it). The machine installed correctly, but it made an array that I wanted to change. It created a raid5 array across 5/8 disks and I've changed it to raid10 across 8 disks. I've done this by first --stopping the old array and then --creating the new array. It warned me that a previous array was there, but I chose to continue. So it created the array, spent 10ish hours syncing it and now that it's ready I get this strange behavior: When I fdisk p on it, I see the correct size. But when I mdadm --detail it I see the old array's size even tho I get the new composition and level. When I try to pvcreate on it, i get the old size again for some reason. Did I have to do something else? Did I miss something?

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• FreeNAS pool configuration - RAID1 + other drives

  - by trnelson

  Simple questions, really. I found this answer with a similar setup, but not sure it answers my question. If it does, I'm curious why since the answer seems a bit unsure: ZFS Hard Drive Configuration in FreeNAS I'm building a server which will be used primarily for backup, plus some media streaming, possibly with Plex. I seem to understand most everything I need, but I'm still a bit confused on how pools work, and how to configure them for my scenario. I will have 2x 2TB WD Red drives, which I plan on using in a mirrored set up (RAID1). This would be for backup, and I'd also like to do offsite backup to my CrashPlan account from this array. I also have a few other drives: 1.5TB, 320GB, 250GB. I'm not sure exactly what to do with them yet, but looking for options. FreeNAS OS will be running from a 16GB USB Flash drive. Would it be wise to use the 1.5TB as a backup-backup, essentially as a mirror or perhaps for snapshots of the 2TB RAID1? I'm still learning about snapshots. Should the 2TB mirrored drives be in their own pool? Should the other drives be set up in their own pools as well, or should they be JBOD in a single pool? They may or may not get much use since the 2TB array is plenty for me. Does a dataset basically mimic the idea of a partition or a network share? In other words, I would map \SERVER\Share to X: on my laptop? Let's say I wanted to use the 250GB drive as an encrypted drive to store all of my cat pictures. Would it have to be in its own pool? If I use jails apps, should they go in the backup RAID1, or in another place? Thank you!

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• spontaneous hard disk password

  - by sc

  I had an HP proliant server go down recently. All of the sudden the sas controller (e200i) would not see any of the physical disks. New disks were detected just fine. I thought it was odd that all 6 disks would go down at one time so sent them to a data recovery firm to find out what happened. I'm being told that, somehow, all of the disks were spontaneously password protected. These are Hitachi 2.5" drives and I guess this is something of a known issue. The company has worked for a while to try and recover them, with no luck. Has anyone had experience with this? Any recommendations for how to recover the drives or a company that might have the expertise to do so?

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