I have a 12 disk raid 6 Array with 2 additional spare drives. Two of the drives got out of sync (because I was fat fingering the mdadm commands while trying to reassemble the array), so I added them back as spares. This is what mdadm is showing me:
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$cat /proc/mdstat
Personalities : [linear] [multipath] [raid0] [raid1] [raid6] [raid5] [raid4] [raid10]
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1/4 of my drives died after about 3 years of usage. I replaced it with an identical drive and did a mdadm -add to re-add it to the array. I expected this to take quite a long time, but not more than 1 million minutes to complete!
I installed 10.04 on a new machine and 'tried' to create a 4 disk RAID6 array on four new 4TB drives.The build seemed to go fine, but a check on the new dev shows the following:
/dev/md0:
Version : 00.90
Creation Time : Sun May 30 21:53:11 2010
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I have an 8x1TB raid6 array that I finally got back to a good state (see my other post here: [URL]..This is on a 9.04 server Now I can assemble the array no problem, but mounting is the issue. I think the reason might be because the array order changed. In the process of recovering I removed the /dev/md0 array and created a new array. In the create array command it told me:
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mdadm: /dev/sdb1 appears to be part of a raid array: for each device in the array. I confirmed that I wanted to continue and the array was recreated. I think this overwrote the superblock, but I'm not sure.
After the sync I tried to mount the array using:
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I have an old Athlon XP 3000 machine that I keep around as a file server.It's currently got three 1TB drives which I had setup as mdadm raid 5 on FC10. The machine's original drive held the superblock for the raid array and it just had a massive heart attack. I've searched, my biggest source being URL...I can't tell if I can reassemble the superblock info lost with the original hard drive or if I've lost it all...
View 9 Replies View RelatedIts from a Synology Box with 3 disks, which one is damaged. But this disk wasnt in use.Take a look on the raid-size of 493 GB - and the both available disks with 250GB..)
On the others there were a linear raid. during this damaged disk the synology-device tells me, that the volume was crashed.But it look like, that this disk was not mounted into this volume.Quote:
DiskStation> mdadm --detail /dev/md2
/dev/md2:
Version : 00.90
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As per [URL] I built a RAID6 array. yay. In the end it completed.
Code:
fermulator@fermmy-server:~$ cat /proc/mdstat
Personalities : [linear] [multipath] [raid0] [raid1] [raid6] [raid5] [raid4] [raid10]
md2000 : active raid6 sdo1[3] sdn1[2] sdm1[1] sdl1[0]
3907026944 blocks level 6, 64k chunk, algorithm 2 [4/4] [UUUU]
To test stability, I rebooted the system, but on reboot, the array wasn't assembled correctly. Basically it had one device in "md_d2000", as a spare. So I stopped that device with
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sudo mdadm --stop /dev/md_d2000
The superblocks looked good ...
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fermulator@fermmy-server:~$ sudo mdadm -E /dev/sd[lmno]
/dev/sdl:
Magic : a92b4efc
Version : 00.90.00
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I don't have any important data on the array yet ... so I zero'd the superblocks on all devices, deleted the partitions, and started over .. here I go again:
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md2000 : active raid6 sdo1[3] sdn1[2] sdm1[1] sdl1[0]
3907026944 blocks level 6, 64k chunk, algorithm 2 [4/4] [UUUU]
[>....................] resync = 0.7% (14164844/1953513472) finish=313.7min speed=102999K/sec
I have software raid 5 array, each time I reboot my server, I have to rebuild array again. Rebuilding array takes too long. I am using ubuntu server 10.10.
View 7 Replies View RelatedI'm breaking into the OS drive side with RAID-1 now. I have my server set up with a pair of 80 GB drives, mirrored (RAID-1) and have been testing the fail-over and rebuild process. Works great physically failing out either drive. Great! My next quest is setting up a backup procedure for the OS drives, and I want to know how others are doing this.
Here's what I was thinking, and I'd love some feedback: Fail one of the disks out of the RAID-1, then image it to a file, saved on an external disk, using the dd command (if memory serves, it would be something like "sudo dd if=/dev/sda of=backupfilename.img") Then, re-add the failed disk back into the array. In the event I needed to roll back to one of those snapshots, I would just use the "dd" command to dump the image back on to an appropriate hard disk, boot to it, and rebuild the RAID-1 from that.
Does that sound like a good practice, or is there a better way? A couple notes: I do not have the luxury of a stack of extra disks, so I cannot just do the standard mirror breaks and keep the disks on-hand, and using something like a tape drive is also not an option.
When trying to rebuild a RAID1 on a FastTrak TX4310 controller after a disk was replaced the below message is given:
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[root@SAMBA Samba]# dmraid -R pdc_gigcjhdfa /dev/sdc
Volume "pdc_gigcjhdfa" is not in rebuild state (current: 16)
Rebuild: cannot rebuild from current state!
I have never preformed a rebuild of an RAID array. I am collecting resources, which details how to build an RAID 5 array when one drive has failed. Does the BIOS on the RAID controller card start to rebuild the data on the new drive once it is installed?
I've got 2 hard disk drives of 250GB, with this partitions :
All partitions are with format "linux raid software". I made 3 raid1 with them like that :
I want to clone them to news hdd of 500Gb, to have this partitions :
My problem, how can I resize partitions, before resize the array md2 with the command mdadm --grow /dev/md1 --size=max ?
After, how can I rebuild /dev/md2 without lost any datas ?
I'm using ubuntu-server 10.04 64bits.
I have a laptop and a desktop PC, both running Ubuntu 10.04 and both are configured the same way. I am using Unison-gtk to sync the data between both computers... This works for everything... except for my mysql databases. Any way to simply sync my mysql databases on both computers. Right now I need to do this table-per-table... and it is quite long to proceed like this. What I need is a script or a program (open and preferably free) that would just compare both databases (all the tables) and sync them either by updating existing tables or by creating them. This should work both ways... obviously. I could write a script for this, but I am sure there already is something for this out there.
View 9 Replies View RelatedI'm having trouble keeping NTP synchronized and able to provide time updates to other devices on the private network. I believe this is because the server has a too large of offset, that causes all NTP clients syncing through the server to fail.
I have two setups, one working, one failing, with mostly identical installation and settings.
Setup A is the working setup, as I will name it, is ubuntu server edition 8.04 with kernel 2.6.33.1. ntpd version is 4.2.4p4.
ntpq -p outputs this information:
remote refid st t when poll reach delay offset jitter
================================================== ============================
*europium.canoni 193.79.237.14 2 u 925 1024 377 101.851 0.194 0.328
ntp.conf is:
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I have a folder on my workstation and I currently have an identical copy on my nas mounted via ifs (I'll be using this as my backup). The folder contains many virtual machines that are usually powered off. I like to think of the copy on my nas as a backup. The benefit of having two copies of my vms is that if I boot up too many on my workstation and the drive starts to cause a bottle neck I can simply boot the vms from the nas instead. (gigabit ethernet)
I would like changes I make to my local copy to be reflected on the nas.
I want this to happen In the background, I.e. If I turn off my machine it shouldnt cause a problem, the next time I boot up it just re checks the files and continues syncing the 2 directories.
What is the best tool for the job? Rsync?
I've never really used it before so a few pointers to get me going would be great, or obviously other recommendations if there are any.
What configuration options in /etc/ntp.conf do I have to set to allow other computers to receive time from a ntpd server? I've tried removing "nopeers" and "noquery" from the restrict lines, but I can't see anything on port 123.
View 2 Replies View RelatedI've got a file server with two RAID volumes. The one in question is 6 1TB SATA drives in a RAID6 configuration. I recently thought one drive was becoming faulty, so I removed it from the set. After running some stress tests, I determined my underlying problem hadn't cleared up. I added the disk back, which started the resync. Later on, the underlying problem caused another lock up. After a hard-reboot, the array will not start. I'm out of ideas on how to kick this over.
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$ cat /proc/mdstat
Personalities : [linear] [multipath] [raid0] [raid1] [raid6] [raid5] [raid4] [raid10]
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I must use have my time configured for my VPN to work? I have an NTP configured also but can't just place what seems to be wrong that my routers in different locations doesn't all synchronize with my vpn server.
View 1 Replies View RelatedI use Arch, but no info about it in official wiki.
View 2 Replies View RelatedI'd like for the server (10.04) to keep samba passwords and unix passwords "in sync"; i.e. when a user changes his unix password (via passwd), his Samba password is automatically changed to match the unix password. Similarly, when a user changes his samba password (via smbpasswd), then his unix password is changed to match. smb.conf seems to make provision for this; following are the applicable entries from my smb.conf:
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obey pam restrictions = Yes
pam password change = Yes
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I've got Ubuntu One syncing a single 25MB folder on 4 computers. On one of these computers, the ubuntuone-syncdaemon process constantly pegs the CPU, using from 50-80% long after any sync-able files have been modified and successfully synced. The process is only using 8.9MB of RAM.
Specs:
Ubuntu 10.04 (lucid)
Kernel 2.6.32-24-generic
1000.8 MB RAM
Pentium 4 2.53GHz
Free disk space: 280.9 GB
System monitor shows 56.8% total RAM usage, 15.4% swap file usage.
Audio sync method. "Stretches/squeezes" the audio stream to match the timestamps, the parameter is the maximum samples per second by which the audio is changed. -async 1 is a special case where only the start of the audio stream is corrected without any later correction.Searching the net makes one believe that this command is just some sort of magic.People just put it in the line and it just works. Isn't that nice?
It says nothing about how to change the TIME the audio starts syncing. Like do I want it to start 5 seconds delayed? Or what about 5 seconds sooner?What if the audio gets more out of sync as the video goes on? Can I slip it a little at a time? What? No magic?No one mentions a file that already has badly synced audio.So what -async 1 really does is simply start the audio at the beginning of the file. LIKE AS IF THAT ISN'T STANDARD PROCEDURE?So what is the exact solution to syncing a messed up video? And why can't it just do the proper "timestamp" sync in the first place?No docs, no info and you are left out in the cold.
Ok first off the write speeds are off the hook, 210MB/s on 5400RMS disks (5 disks in a RAID 6). However, read speeds are 68MB/s. I wondering first off, why? and secondly could this be an indicator of something not properly setup that might cause harm to my disks?
View 5 Replies View RelatedI am running lucid and have a 4+1(spare) RAID5 array made up of 1TB disks. I upgraded my mdadm to version 3.1.4 and then performed the following operation:
$sudo mdadm --grow /dev/md3 --level=6 --read-device=5 --backup-file=/var/lib/mysql/md3backup
I have a 500GB drive mounted at /var/lib/mysql which is mostly empty and not part of any RAID array.The reshaping started and everything looked OK. The access lights on the 5 drives were all coming on at the same time on a regular basis. The status from /proc/mdstat showed the array being reshaped to RAID6, albeit slowly. The status showed an average speed of 4000KB and an estimated completion time of 4000 minutes. This all seemed reasonable. This was performed in late afternoon.
The next morning I checked the status and the average speed was down to 300->400KB and the estimated time to complete was 40,000 minutes. When I look at the drive lights, I have one drive whose access light is on solid and the other four drives come on intermittently. Running iotop doesn't show anything useful. mdadm and kjournal show up occasionally. The same is true for top (running on an i5 2500K Intel processor). Here is the output of cat /proc/mdstat:
Personalities : [linear] [multipath] [raid0] [raid1] [raid6] [raid5] [raid4] [raid10]
md2 : active raid1 sde3[4](S) sda3[3] sdc3[1] sdd3[2] sdb3[0]
987904 blocks [4/4] [UUUU]
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My biggest concern is keeping this system running for 20+ days without any hiccups.
I use jpilot on opensuse 11.3 64bit to sync pim data with my Palm Treo 680 via bluetooth. This worked fine until today. Now I get the following error message when I try to sync: Syncing on device bt: Press the HotSync button now dlp_ReadSysInfo error Exiting with status YNC_ERROR_PI_CONNECT Finished.
The last successfull sync was on the 20th October and today is the 24th October. I did not change any settings in jpilot or on my palm device. So I guess there must have been an update of opensuse which causes this error. But I do not now how to look up the updates during this period or how to undo them. Was there an update between the 20th and the 24th Oktober, which might affect either jpilot or bluetooth functionality?
Note: This how-to assumes you are using LVM on top of the RAID5
Example scenario:
VG0 <-> md0 = RAID5(3x500GB) = sda1, sdb1, sdc1
Volume Group VG0 is made up of a single Physical Volume (md0), which is made up of 3x500GB hard drives in
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I've discovered Firefox Sync a while ago, and it's absolutely awesome. Now of course I'd like most of my software to work this way! So is there a way to get the same behavior with Thunderbird?
View 1 Replies View RelatedI'm running debian and used mdadm to setup up a raid 6 array with 4x1TB drives with roughly 1.86TB's available with lvm. Then I added 4x1TB drives to the array. So now I have an 8 drive raid 6 array with 5.+TB's available, the array sees all available space. The question is how do I extend the volume group so that it uses the whole raid and not just half of it. As of right now the volume group is only 1.86TB's.
View 6 Replies View RelatedI have two drive on my Ubuntu server. I have a 40GB IDE 5400RPM and an 80GB SATA 7200RPM.
Is it at all possible to RAID 0 the two of these drive? I know it's pretty unorthodox, but it's what I've got without having to buy anything.
If so, what are the limits, cons, and/or potential pros of doing a RAID of these two?
I installed mdadm and created an array of 4 drives in RAID 5
the problem I'm having is after I rebooted my machine and tried to mount my array it forget's to add 1 drive to the array
[nrooy@sniper-wolf ~]sudo mdadm --assemble --scan --verbose
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mdadm: looking for devices for further assembly
mdadm: cannot open device /dev/block/251:1: Device or resource busy
mdadm: cannot open device /dev/root: Device or resource busy
mdadm: no RAID superblock on /dev/sde
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