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how to rebuild RAID 10 array

I have 4x120GB SCSI hard disks grouped together using RAID 10 on Red Hat ES Linux 3.0.
During a power cut, one of the disks failed on me.  The system recovered (as RAID 10 is
designed to do!), however the system is now at risk because there are only three working disks.

Can anyone describe or point me to an article that describes how I can replace this
disk and rebuild the array.

Would appreciate step by step guidance.
Many thanks
0
u9707118
Asked:
u9707118
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1 Solution
 
Cyber-DudeCommented:
Go to the following link:
http://www.runtime.org/raid.htm

Reconstruct RAID 0 at fierst that RAID 1.

Cyber
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Handy HolderSaggar makers bottom knockerCommented:
use raidhotadd to put the drive back into the array.

See section 8 of http://www.tldp.org/HOWTO/Software-RAID-HOWTO.html. Note you might have to use raidhotremove to take the faulty drive out of the array but make sure you remove the right one! It might already be rebuilding, have you looked at /proc/mdstat to check the status?
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Handy HolderSaggar makers bottom knockerCommented:
Or there's another howto here,
www-106.ibm.com/developerworks/eserver/library/es-SW_RAID_LINUX.html?ca=dnp-328
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