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Old 02-09-2009, 02:54 AM   #1
Registered: Jan 2007
Posts: 101

Rep: Reputation: 15
RAID 1 Partition Failed

Dear friends,

My CentOS 4.7 server refused to boot one morning. Fortunately I had two hard disks mirrored in the server. I swapped the drives --- i.e. made sda as sdb and vice versa. The system booted and started working as usual.

but on examining the RAID, I find that:

the output of mdadm --query --detail /dev/md1 is as follows:-

Number Major Minor RaidDevice State

0 8 18 0 active sync /dev/sdb2

1 0 0 - removed

Can anyone suggest how to rectify the problem ?

Old 02-09-2009, 05:29 AM   #2
Registered: Jul 2005
Location: Manchester (UK)
Distribution: Fedora CentOS
Posts: 132

Rep: Reputation: 18
Essentially the problem is, from what I understand that you've added a new hard drive to the server in place of the dead one but not added it to the array?

You might want to check out this:


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