Sorry for the noob question but I want to make sure I get this right.
I have a raid 1 (sata) running on an active server - mdadm reports sda1 as
faulty. Running "mdadm --examine /dev/sda1" shows the state as dirty, no
errors - no failed devices. Can I assume the disk is ok, just needs to be
re-added to the array?
I'm assuming I need to first remove sda1 from the raid then re-add it,
correct? If so, what are the specific steps? Can this be done safely on a
live server without pulling the system down? How will this affect rebooting
once completed - if at all? Any gotchas I should look out for?
Here's some mdadm output...
/sbin/mdadm --detail /dev/md0
/dev/md0:
Version : 00.90.00
Creation Time : Thu Jan 27 09:55:22 2005
Raid Level : raid1
Array Size : 154183680 (147.04 GiB 157.88 GB)
Device Size : 154183680 (147.04 GiB 157.88 GB)
Raid Devices : 2
Total Devices : 2
Preferred Minor : 0
Persistence : Superblock is persistent
Update Time : Wed Sep 13 01:45:03 2006
State : dirty, no-errors
Active Devices : 1
Working Devices : 1
Failed Devices : 1
Spare Devices : 0
Number Major Minor RaidDevice State
0 8 1 0 faulty /dev/sda1
1 8 17 1 active sync /dev/sdb1
UUID : 49f6e41a:28dde75c:8f133fe5:823322fb
Events : 0.40
/sbin/mdadm --examine /dev/sda1
/dev/sda1:
Magic : a92b4efc
Version : 00.90.00
UUID : 49f6e41a:28dde75c:8f133fe5:823322fb
Creation Time : Thu Jan 27 09:55:22 2005
Raid Level : raid1
Device Size : 154183680 (147.04 GiB 157.88 GB)
Raid Devices : 2
Total Devices : 2
Preferred Minor : 0
Update Time : Wed May 24 04:59:32 2006
State : dirty, no-errors
Active Devices : 2
Working Devices : 2
Failed Devices : 0
Spare Devices : 0
Checksum : bce563ef - correct
Events : 0.39
Number Major Minor RaidDevice State
this 0 8 1 0 active sync /dev/sda1
0 0 8 1 0 active sync /dev/sda1
1 1 8 17 1 active sync /dev/sdb1
TIA for any assistance you can provide.
--chapman
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