RAID 5 Drive Failure - Replacement with old drive

I have a raid 5 array that has a drive failure. I have an old server that has the same drives in it. Can I put one of the old servers drives into the array? Should I wipe it first?
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Nick RhodeIT DirectorCommented:
I would wipe it 1st and then use it
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Daniel HelgenbergerCommented:
Make sure it is not the same controller model! Otherwise it may recognize the drive as 'alien' and will not use it.

You do not need to wipe the whole drive, but the first sectors, RAID controllers write their info there. Put the drive into an external adapter or on a non raid port for that.

On linux with dd, this should do the trick:
dd if=/dev/zero of=/dev/<yourdisk> count=10240

Open in new window

This will wipe any RAID partition from the drive and will make it appear as 'new' for your raid controller.
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is_staffAuthor Commented:
I went in and deleted the logical raid configuration and now am wiping thru the bios.
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koquitoCommented:
Yes and yes, however,  the procedures will be different depending on the amount of drives in your RAID 5 array.  if you have only three, then install the new (from the other server) in and let it sync, then remove the bad drive out of the array after all sync has finished.
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PowerEdgeTechIT ConsultantCommented:
What server and controller are we dealing with?
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is_staffAuthor Commented:
@poweredge - Its a poweredge2850

@koquito - The bad drive is already out of the system
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PowerEdgeTechIT ConsultantCommented:
As long as you insert the replacement drive "hot", there is no reason to "wipe" it first.  The drive should be inserted "hot" whenever there are hot-swap drives (like on the 2850).  When inserted "hot", the controller will ignore the data on the disk and will usually start rebuilding it into the array automatically.
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is_staffAuthor Commented:
I ended up deleting the config from the old server and then thru the bios of the old server wiping the drive. I had no issues with rebuilding the array.
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PowerEdgeTechIT ConsultantCommented:
Glad you got it sorted out, but just FYI, wiping the drive is not necessary.
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