From: vherva@turing.netspan.fi
To: linux-raid@vger.kernel.org
Subject: 3-disk RAID1 - only two disks active
Date: Tue, 15 Nov 2005 15:26:22 +0200 [thread overview]
Message-ID: <20051115152622.A2237@turing.netspan.fi> (raw)
I had two disks taken off from the three-disk raid set (hda,hdb,hdc - hdc
failed by itself, hdb was marked bad with raidsetfaulty). When the new disks
were added back to the set (with raidhotadd), only two of them became active
and one remained as a hot spare.
I there a way to reconfigure all three to become active again?
This is kernel 2.4.32-rc1.
> cat /proc/mdstat
Personalities : [raid1]
read_ahead 1024 sectors
md1 : active raid1 hdb1[2] hdc1[1] hda1[0]
102720 blocks [2/2] [UU]
md2 : active raid1 hdb2[2] hdc2[1] hda2[0]
1024064 blocks [2/2] [UU]
md3 : active raid1 hdb3[2] hdc3[1] hda3[0]
37955648 blocks [2/2] [UU]
unused devices: <none>
> mdadm --detail /dev/md1
/dev/md1:
Version : 00.90.00
Creation Time : Fri May 10 13:42:55 2002
Raid Level : raid1
Array Size : 102720 (100.33 MiB 105.19 MB)
Device Size : 102720 (100.33 MiB 105.19 MB)
Raid Devices : 2
Total Devices : 3
Preferred Minor : 1
Persistence : Superblock is persistent
Update Time : Mon Nov 14 23:17:03 2005
State : active
Active Devices : 2
Working Devices : 3
Failed Devices : 0
Spare Devices : 1
UUID : d3f91d5b:5587896d:982609b1:c6a3e584
Events : 0.191
Number Major Minor RaidDevice State
0 3 1 0 active sync /dev/hda1
1 22 1 1 active sync /dev/hdc1
2 3 65 2 spare /dev/hdb1
> cat /etc/raidtab
raiddev /dev/md3
raid-level 1
nr-raid-disks 3
persistent-superblock 1
nr-spare-disks 0
device /dev/hda3
raid-disk 0
device /dev/hdb3
raid-disk 1
device /dev/hdc3
raid-disk 2
raiddev /dev/md2
raid-level 1
nr-raid-disks 3
persistent-superblock 1
nr-spare-disks 0
device /dev/hda2
raid-disk 0
device /dev/hdb2
raid-disk 1
device /dev/hdc2
raid-disk 2
raiddev /dev/md1
raid-level 1
nr-raid-disks 3
persistent-superblock 1
nr-spare-disks 0
device /dev/hda1
raid-disk 0
device /dev/hdb1
raid-disk 1
device /dev/hdc1
raid-disk 2
next reply other threads:[~2005-11-15 13:26 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-11-15 13:26 vherva [this message]
2005-11-15 23:01 ` 3-disk RAID1 - only two disks active Neil Brown
2005-11-16 3:23 ` Ville Herva
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