is my raid ok? [SOLVED]

syamajala · 2011-06-05 15:38:33

I recently setup a raid5, but I'm not sure if its ok or not.

Here is what /proc/mdstat says,

Personalities : [raid6] [raid5] [raid4] 
md0 : active raid5 sdb[0] sde[3](S) sdd[4] sdc[1]
      976770048 blocks super 1.2 level 5, 512k chunk, algorithm 2 [3/2] [UU_]
      
unused devices: <none>

And here is what mdadm -Q --detail /dev/md0 says,

/dev/md0:
        Version : 1.2
  Creation Time : Wed Jun  1 13:41:44 2011
     Raid Level : raid5
     Array Size : 976770048 (931.52 GiB 1000.21 GB)
  Used Dev Size : 488385024 (465.76 GiB 500.11 GB)
   Raid Devices : 3
  Total Devices : 4
    Persistence : Superblock is persistent

    Update Time : Sun Jun  5 11:34:31 2011
          State : active, degraded
 Active Devices : 2
Working Devices : 4
 Failed Devices : 0
  Spare Devices : 2

         Layout : left-symmetric
     Chunk Size : 512K

           Name : arch.genisis.blogdns.net:0  (local to host arch.genisis.blogdns.net)
           UUID : 6ef1147a:5180175d:30586b3e:68687a10
         Events : 15307

    Number   Major   Minor   RaidDevice State
       0       8       16        0      active sync   /dev/sdb
       1       8       32        1      active sync   /dev/sdc
       4       8       48        2      spare rebuilding   /dev/sdd

       3       8       64        -      spare   /dev/sde

This rebuild has been going on for a while. I've left my system on for a few hours at a time over the past few days, but its still not done.

Last edited by syamajala (2011-06-08 16:56:42)

fukawi2 · 2011-06-05 23:34:15

syamajala wrote:

This rebuild has been going on for a while. I've left my system on for a few hours at a time over the past few days, but its still not done.

How big are the disks/array? The rebuild will restart each time you restart your computer, so leave it on without restarting until the rebuild is finished. It could take a loooong time with big disks, or if the system is doing other things at the same time.

syamajala · 2011-06-08 00:16:38

The disks are 500gb each. 3 in the raid, 1 spare. I've left it on for a day, but it doesn't seem to be done yet. Is there any way to check its progress, besides mdadm and mdstat?

I decided to just recreate the array. I know when its created the very first time it shows the status of the rebuild in /proc/mdstat, so i figured i would just let it go. It wasn't a big deal since I didn't put any data on the array yet anyway since I was waiting for the rebuild to finish. This time I'll just let it finish before I shut the system down.

Last edited by syamajala (2011-06-08 00:26:07)

fukawi2 · 2011-06-08 05:30:24

/proc/mdstat will always show you the status, not just the first time.

syamajala · 2011-06-08 07:49:24

It must not have been rebuilding before, because it wasn't saying the percent completed of the rebuild anywhere. Also, after I recreated it, in mdadm -Q --detail was active, degraded, recovering.

Anyway, its all done now, and everything seems to look ok.

ewaller · 2011-06-08 15:15:52

Moderator: Please edit the original post at add [SOLVED] to the subject.

Thanks

Arch Linux

#1 2011-06-05 15:38:33

is my raid ok? [SOLVED]

#2 2011-06-05 23:34:15

Re: is my raid ok? [SOLVED]

#3 2011-06-08 00:16:38

Re: is my raid ok? [SOLVED]

#4 2011-06-08 05:30:24

Re: is my raid ok? [SOLVED]

#5 2011-06-08 07:49:24

Re: is my raid ok? [SOLVED]

#6 2011-06-08 15:15:52

Re: is my raid ok? [SOLVED]

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