Redhat 9.0 Rebuild raid 5 array
Mark Farmer
farmerma at cromwell.co.uk
Mon Oct 11 12:27:04 UTC 2004
Brian McGrew wrote:
> I've got the following:
>
> Personalities : [raid1] [raid5]
> read_ahead 1024 sectors
> md2 : active raid5 hde1[0] hdf1[1] hdg1[2](F) hdh1[3]
> 468864768 blocks level 5, 64k chunk, algorithm 0 [4/3] [UU_U]
>
> md1 : active raid1 hda3[0] hdb3[1](F)
> 34901120 blocks [2/1] [U_]
>
> md0 : active raid1 hda1[0] hdb1[1]
> 1052160 blocks [2/2] [UU]
>
> unused devices: <none>
>
> I know that one of the drives in md2 is failing. Once I replace it, how to I rebuild the array?
>
> -brian
raidhotremove will allow you to remove the failed disk
raidhotadd will put the new disk into the array.
If I remember correctly, the array will rebuild itself once the new disk is added.
man -k raid will give you some man pages to read for more info.
Usefull tip: watch cat /proc/mdstat will allow you to monitor it's progress with 2 second
updates ;-)
--
Mark Farmer
Linux System Administrator
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