Possible Duplicate:
How to recover from RAID 5
there are 5 disk-array. i've lost the data of one of them. How can i recover?
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Sign up to join this communityPossible Duplicate:
How to recover from RAID 5
there are 5 disk-array. i've lost the data of one of them. How can i recover?
This really belongs on serverfault.
Before you do anything check the status of your backups.
Assuming you have enough working disks in the array to rebuild: replace the faulty disk with another identical one, and perform a rebuild.
Suggest you read: Common mistakes while performing RAID recovery