I have a system which has a failed SATA drive in a mirror
configuration using Brian's 4.5.
The failed drive was sda. So I replaced it. I disconnected sdb
temporary and booted up with knoppix. I ran an fdisk on sda and
deleted all the partitions. I did a write and nothing more. I then
proceeded to swap cable making sdb in place of sda and booted up (I
did this because when I didn't swap cables the system had a kernel
panic). I booted up just fine except that the RAID doesn't seem to
want to rebuild. Here is what I am getting. Any ideas on exactly
what I need to do to get the RAID working again, do let me know. I
have rebooted several times.
[root (at mark) juhfah ~]# /etc/rc.d/init.d/mdchk
-- Reading system configuration from /etc/raidtab
/dev/md1 [raid1]: <sdb2> <null>
/dev/md2 [raid1]: <sda6> <sdb6>
/dev/md3 [raid1]: <sda3> <sdb3>
/dev/md4 [raid1]: <sda7> <sdb7>
/dev/md5 [raid1]: <sda5> <sdb5>
/dev/md6 [raid1]: <sda1> <sdb1>
-- Reading current status from /proc/mdstat
! /dev/md1 [raid1]: <sda2> (FAIL)
! /dev/md2 [raid1]: <sda6> (FAIL)
! /dev/md3 [raid1]: <sda3> (FAIL)
! /dev/md4 [raid1]: <sda7> (FAIL)
! /dev/md5 [raid1]: <sda5> (FAIL)
! /dev/md6 [raid1]: <sda1> (FAIL)
-- Failed RAID device(s): /dev/null /dev/sdb6 /dev/sdb3 /dev/sdb7
/dev/sdb5 /dev/sdb1
-- RAID status: [/dev/nul]: FAIL
-- Setup partition table: sdb->nul
-- Check source device: [/dev/sdb] 122099292 MB - OK
-- Check target device: [/dev/nul] - OK
-- Check partition table: /dev/sdb
/dev/sdb1 : start= 0, size= 0, Id= 0
/dev/sdb2 : start= 0, size= 0, Id= 0
/dev/sdb3 : start= 0, size= 0, Id= 0
/dev/sdb4 : start= 0, size= 0, Id= 0
-- Build partition table: /dev/nul
/dev/nul: No such file or directory
sfdisk: Fatal error: cannot find /dev/nul
-- Sync hard drive.
-- RAID setup complete.
-- Reading system configuration from /etc/raidtab
/dev/md1 [raid1]: <sdb2> <null>
/dev/md2 [raid1]: <sda6> <sdb6>
/dev/md3 [raid1]: <sda3> <sdb3>
/dev/md4 [raid1]: <sda7> <sdb7>
/dev/md5 [raid1]: <sda5> <sdb5>
/dev/md6 [raid1]: <sda1> <sdb1>
-- Reading current status from /proc/mdstat
! /dev/md1 [raid1]: <sda2> (FAIL)
! /dev/md2 [raid1]: <sda6> (FAIL)
! /dev/md3 [raid1]: <sda3> (FAIL)
! /dev/md4 [raid1]: <sda7> (FAIL)
! /dev/md5 [raid1]: <sda5> (FAIL)
! /dev/md6 [raid1]: <sda1> (FAIL)
-- Failed RAID device(s): /dev/null /dev/sdb6 /dev/sdb3 /dev/sdb7
/dev/sdb5 /dev/sdb1
-- RAID status: [/dev/nul]: FAIL
[root@juhfah ~]# mdadm /dev/md2 -a /dev/sdb6
mdadm: cannot find /dev/sdb6: No such file or directory
Every 2.0s: cat
/proc/mdstat
Wed Oct 4 20:55:41 2006
Personalities : [raid1]
md6 : active raid1 sda1[1]
104320 blocks [2/1] [_U]
md3 : active raid1 sda3[1]
4192896 blocks [2/1] [_U]
md5 : active raid1 sda5[1]
1052160 blocks [2/1] [_U]
md2 : active raid1 sda6[1]
1052160 blocks [2/1] [_U]
md4 : active raid1 sda7[1]
231504576 blocks [2/1] [_U]
md1 : active raid1 sda2[1]
6289344 blocks [2/1] [_U]
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