At 07:23 PM 8/20/2009, NeilBrown wrote:
On Fri, August 21, 2009 12:01 pm, jeffunit wrote:
> I had a computer that was running mdadm with no problems.
> Then the motherboard failed, while the array was in the process of
> rebuilding.
> I replaced the motherboard with a new motherboard,
> and I an trying to rebuild my raid array.
>
> I am running mandriva 2009.1 spring (the latest). The kernel is 2.6.29.6
> I have a 7 drive raid 5 array.
> I said
> mdadm --assemble /dev/md0 /dev/sd[bcdefgh]
>
> I got the error
> mdadm cannot open device: /dev/sdb device or resouce busy
> mdadm device /dev/md0 has no superblock - assembly aborted
>
> I then tried to make a degraded array
> mdadm --assemble /dev/sd[cdefgh] --force
> That seemed to work, and the array was degraded.
>
> I decided to reboot to see if I could get /dev/sdb online.
> I did, and it didn't help.
>
> What can I do to recover my array?
You need to find out why sdb is busy.
Maybe look in /sys/block/sdb/holders.
Maybe some filesystem on it go automagically mounted by mistake
or something.
Maybe send:
cat /proc/mounts /proc/swaps /proc/mdstat /proc/partitions
find -H /sys/block/sdb -ls
and we can see if there are any hints.
Maybe send full kernel logs from the boot sequence as well.
The 7 drives are dedicated to raid. I checked /etc/fstab, and none of
the raid drives are there.
I have included everything but the kernel logs.
Does any of this help with a path forward?
thanks,
jeff
/sys/block/sdb/holders has:
0 lrwxrwxrwx 1 root root 0 2009-08-20 19:49 md_d125 ->
../../../../../../../../.
./../virtual/block/md_d125/
(I don't understand this, but I suspect it is the problem, and I
don't know how to fix it)
# cat /proc/mounts
rootfs / rootfs rw 0 0
/dev/root / ext4 rw,relatime,barrier=1,data=ordered 0 0
/dev /dev tmpfs rw,mode=755 0 0
/proc /proc proc rw 0 0
/sys /sys sysfs rw 0 0
/proc/bus/usb /proc/bus/usb usbfs rw,devgid=43,devmode=664 0 0
none /dev/pts devpts rw,mode=620 0 0
none /dev/shm tmpfs rw 0 0
/dev/sda7 /home ext4 rw,relatime,barrier=1,data=ordered 0 0
/dev/sda1 /mnt/windows fuseblk
rw,user_id=0,group_id=0,default_permissions,allow
_other,blksize=4096 0 0
none /proc/sys/fs/binfmt_misc binfmt_misc rw 0 0
none /sys/fs/fuse/connections fusectl rw 0 0
gvfs-fuse-daemon /home/jdeifik/.gvfs fuse.gvfs-fuse-daemon
rw,nosuid,nodev,user_
id=500,group_id=500 0 0
# cat /proc/swaps
Filename Type Size Used
Priority
/dev/sda6 partition 1028120 0 -1
# cat /proc/mdstat
Personalities :
md_d121 : inactive sdh[6](S)
732574464 blocks
md_d122 : inactive sdd[2](S)
732574464 blocks
md_d123 : inactive sde[3](S)
732574464 blocks
md_d124 : inactive sdc[1](S)
732574464 blocks
md_d125 : inactive sdb[0](S)
732574464 blocks
md_d126 : inactive sdf[4](S)
732574464 blocks
md_d127 : inactive sdg[5](S)
732574464 blocks
unused devices: <none>
# cat /proc/partitions
major minor #blocks name
8 0 19938240 sda
8 1 8193118 sda1
8 2 1 sda2
8 5 6152863 sda5
8 6 1028128 sda6
8 7 4562428 sda7
8 16 732574584 sdb
8 32 732574584 sdc
8 48 732574584 sdd
8 64 732574584 sde
8 80 732574584 sdf
8 96 732574584 sdg
8 112 732574584 sdh
# find -H /sys/block/sdb -ls
7851 0 drwxr-xr-x 6 root root 0 Aug 20 12:33
/sys/block/sd
b
7852 0 -rw-r--r-- 1 root root 4096 Aug 20 12:33
/sys/block/sd
b/uevent
7853 0 -r--r--r-- 1 root root 4096 Aug 20 12:33
/sys/block/sd
b/dev
7855 0 lrwxrwxrwx 1 root root 0 Aug 20 12:33
/sys/block/sd
b/subsystem -> ../../../../../../../../../../class/block
7857 0 lrwxrwxrwx 1 root root 0 Aug 20 19:33
/sys/block/sd
b/device -> ../../../2:0:0:0
7858 0 -r--r--r-- 1 root root 4096 Aug 20 19:33
/sys/block/sd
b/range
7859 0 -r--r--r-- 1 root root 4096 Aug 20 19:49
/sys/block/sd
b/ext_range
7860 0 -r--r--r-- 1 root root 4096 Aug 20 12:33
/sys/block/sd
b/removable
7861 0 -r--r--r-- 1 root root 4096 Aug 20 19:49
/sys/block/sd
b/ro
7862 0 -r--r--r-- 1 root root 4096 Aug 20 19:33
/sys/block/sd
b/size
7863 0 -r--r--r-- 1 root root 4096 Aug 20 19:49
/sys/block/sd
b/capability
7864 0 -r--r--r-- 1 root root 4096 Aug 20 19:49
/sys/block/sd
b/stat
7865 0 drwxr-xr-x 2 root root 0 Aug 20 19:49
/sys/block/sd
b/power
7866 0 -rw-r--r-- 1 root root 4096 Aug 20 19:53
/sys/block/sd
b/power/wakeup
7868 0 drwxr-xr-x 2 root root 0 Aug 20 19:49
/sys/block/sd
b/holders
10874 0 lrwxrwxrwx 1 root root 0 Aug 20 19:49
/sys/block/sd
b/holders/md_d125 -> ../../../../../../../../../../virtual/block/md_d125
7869 0 drwxr-xr-x 2 root root 0 Aug 20 19:49
/sys/block/sd
b/slaves
7870 0 drwxr-xr-x 3 root root 0 Aug 20 19:49
/sys/block/sd
b/queue
7871 0 -rw-r--r-- 1 root root 4096 Aug 20 19:53
/sys/block/sd
b/queue/nr_requests
7872 0 -rw-r--r-- 1 root root 4096 Aug 20 19:53
/sys/block/sd
b/queue/read_ahead_kb
7873 0 -r--r--r-- 1 root root 4096 Aug 20 19:53
/sys/block/sd
b/queue/max_hw_sectors_kb
7874 0 -rw-r--r-- 1 root root 4096 Aug 20 19:53
/sys/block/sd
b/queue/max_sectors_kb
7875 0 -rw-r--r-- 1 root root 4096 Aug 20 19:53
/sys/block/sd
b/queue/scheduler
7876 0 -r--r--r-- 1 root root 4096 Aug 20 19:53
/sys/block/sd
b/queue/hw_sector_size
7877 0 -rw-r--r-- 1 root root 4096 Aug 20 19:53
/sys/block/sd
b/queue/rotational
7878 0 -rw-r--r-- 1 root root 4096 Aug 20 19:53
/sys/block/sd
b/queue/nomerges
7879 0 -rw-r--r-- 1 root root 4096 Aug 20 19:53
/sys/block/sd
b/queue/rq_affinity
7880 0 -rw-r--r-- 1 root root 4096 Aug 20 19:53
/sys/block/sd
b/queue/iostats
7881 0 drwxr-xr-x 2 root root 0 Aug 20 19:53
/sys/block/sd
b/queue/iosched
7882 0 -rw-r--r-- 1 root root 4096 Aug 20 19:53
/sys/block/sd
b/queue/iosched/quantum
7883 0 -rw-r--r-- 1 root root 4096 Aug 20 19:53
/sys/block/sd
b/queue/iosched/fifo_expire_sync
7884 0 -rw-r--r-- 1 root root 4096 Aug 20 19:53
/sys/block/sd
b/queue/iosched/fifo_expire_async
7885 0 -rw-r--r-- 1 root root 4096 Aug 20 19:53
/sys/block/sd
b/queue/iosched/back_seek_max
7886 0 -rw-r--r-- 1 root root 4096 Aug 20 19:53
/sys/block/sd
b/queue/iosched/back_seek_penalty
7887 0 -rw-r--r-- 1 root root 4096 Aug 20 19:53
/sys/block/sd
b/queue/iosched/slice_sync
7888 0 -rw-r--r-- 1 root root 4096 Aug 20 19:53
/sys/block/sd
b/queue/iosched/slice_async
7889 0 -rw-r--r-- 1 root root 4096 Aug 20 19:53
/sys/block/sd
b/queue/iosched/slice_async_rq
7890 0 -rw-r--r-- 1 root root 4096 Aug 20 19:53
/sys/block/sd
b/queue/iosched/slice_idle
7921 0 lrwxrwxrwx 1 root root 0 Aug 20 19:53
/sys/block/sd
b/queue/bsg -> ../../../bsg/2:0:0:0
7900 0 lrwxrwxrwx 1 root root 0 Aug 20 19:49
/sys/block/sd
b/bdi -> ../../../../../../../../../virtual/bdi/8:16
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