On 23-Sep-13 11:43 AM, Mikael Abrahamsson wrote:
> Do "mdadm --stop /dev/md0" and then try
>
> "mdadm --assemble /dev/md0 /dev/sda2 /dev/sdb1 /dev/sdc2"
>
> See if this removes the busy problem. Also post output from this
> operation as well as what comes up in dmesg when you do this.
Thanks, Mikael - that worked. The output of the various commands are
given below.
# mdadm --stop /dev/md0
mdadm: stopped /dev/md0
[22874.978883] md: md0 stopped.
[22874.978900] md: unbind<sda2>
[22875.018193] md: export_rdev(sda2)
[22875.018284] md: unbind<sdb1>
[22875.059733] md: export_rdev(sdb1)
[22875.059821] md: unbind<sdc2>
[22875.079735] md: export_rdev(sdc2)
[22875.652012] md: md0 stopped.
# mdadm --assemble /dev/md0 /dev/sda2 /dev/sdb1 /dev/sdc2
mdadm: /dev/md0 assembled from 3 drives - not enough to start the array
while not clean - consider --force.
[22875.653625] md: bind<sdc2>
[22875.653943] md: bind<sdb1>
[22875.654302] md: bind<sda2>
# mdadm --assemble --force /dev/md0 /dev/sda2 /dev/sdb1 /dev/sdc2
This worked!!!
# mdadm -Dv /dev/md0
/dev/md0:
Version : 1.2
Creation Time : Sat Mar 2 11:03:45 2013
Raid Level : raid5
Array Size : 468475392 (446.77 GiB 479.72 GB)
Used Dev Size : 156158464 (148.92 GiB 159.91 GB)
Raid Devices : 4
Total Devices : 3
Persistence : Superblock is persistent
Update Time : Mon Sep 23 15:41:08 2013
State : clean, degraded
Active Devices : 3
Working Devices : 3
Failed Devices : 0
Spare Devices : 0
Layout : left-symmetric
Chunk Size : 512K
Name : sysresccd:0
UUID : 01b153ea:a93c7325:c13bf9cf:3195666f
Events : 118445
Number Major Minor RaidDevice State
0 8 2 0 active sync /dev/sda2
1 8 34 1 active sync /dev/sdc2
2 0 0 2 removed
4 8 17 3 active sync /dev/sdb1
Now, I need to find a new hard drive and put it in Slot 2. What would be
the best way to do that, apart from RTFM ?
Thanks for all your help.
Best,
Sachin
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