Hello, All.
I have a trouble of HDD fail of raid-5,raid-0.90 on Redhat 6.0.
Raid-5 is now working on degrade mode.
Exactly, Iacan't repair or replace the failed HDD (to new HDD).
Woule you tell me how to do recovery it?
"/proc/mdstat" is as follows:
[root@oem /root]# cat /proc/mdstat
Personalities : [raid5]
read_ahead 1024 sectors
md0 : active raid5 sdm1[11] sdl1[10] sdk1[9] sdj1[8] sdi1[7] sdh1[6] sdg1[5]
sdf1[4] sde1[3] sdd1[2] sdc1[1] 97192128 blocks level 5, 4k chunk, algorithm 2
[12/11] [_UUUUUUUUUUU]
unused devices: <none>
"sdb1[0]" is failed, I think.
"/etc/raidtab" is as follows:
# Sample raid-5 configuration
raiddev /dev/md0
raid-level 5
nr-raid-disks 12
chunk-size 4
# Parity placement algorithm
#parity-algorithm left-asymmetric
#
# the best one for maximum performance:
#
parity-algorithm left-symmetric
#parity-algorithm right-asymmetric
#parity-algorithm right-symmetric
# Spare disks for hot reconstruction
#nr-spare-disks 0
device /dev/sdb1
raid-disk 0
device /dev/sdc1
raid-disk 1
device /dev/sdd1
raid-disk 2
device /dev/sde1
raid-disk 3
device /dev/sdf1
raid-disk 4
device /dev/sdg1
raid-disk 5
device /dev/sdh1
raid-disk 6
device /dev/sdi1
raid-disk 7
device /dev/sdj1
raid-disk 8
device /dev/sdk1
raid-disk 9
device /dev/sdl1
raid-disk 10
device /dev/sdm1
raid-disk 11
First, I restarted the PC and tryed "raidhotadd" and "raidhotremove" ,the
result is as fllows:
[root@oem /root]# raidhotadd /dev/md0 /dev/sdb1
/dev/md0: can not hot-add disk: disk busy!
[root@oem /root]# raidhotremove /dev/md0 /dev/sdb1
/dev/md0: can not hot-remove disk: disk not in array!
Next, I replaced HDD,/dev/sdb to new HDD, the result, system hung-up on boot
time.
With the message, "/dev/md0 is invalid."
what should I do to recovery the Raid-5 from degrade-mode to normal mode?
Makoto Kurokawa
Engineer, OEM Sales Engineering
Storage Products Marketing, Fujisawa, IBM-Japan
Tel:+81-466-45-1441 FAX:+81-466-45-1045
E-mail:[EMAIL PROTECTED]
