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RAID

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by tech010

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With a RAID array, is it possible to take the disks out of one server and put them into another server or are they tied to the controller?

9 replies

by ann777

They are tied to the controller AND each hdd is also tied to each other (essemtially part of the array or group).

If you remove a hdd from the array and use it in a separate server, then part of that hdd will be useless (the portion where parity information is stored to rebuild the other parts of the whole array).

Also, the original RAID array/server will need to be rebuilt.

by tech010

How about taking all of the drives in the array to a server with the same controller? My company is getting a new server and we want to put the RAID drives from our old server into the new server.

Thanks,

by estebandelatorre

Be carefull.
Yes! you will need to move the disk and the controller all together. Also you will need to keep the disk order!!!
Scsi ID=0 must be moved to scsi_id=0 of the new server (& controller.)
Usually the scsi id's are identified in the slots bays.

First move the controller and let the bios hardware identify your controller.
Then move the disk one by one keeping it's previous id's.
Boot and wait for any strange errors. Start your raid utility and verify the raid status.

Common messages:
1.- Array appears to be changed! (good! start utility)
2.- Slot x array not configured! no disk found (Be carefull, power down and check)

by alli_wuz_from-nrs

Answer # 2 (Anna777) is GOOD INFORMATION. In case the original server did not shut down normally, there may be some data cached but un-written to disk on *the controller itself*, if your RAID controller contains a (rechargeable) BATTERY. If so, get power back to that controller before the battery is exhausted (could be 2 days to 2 weeks!) to avoid losing (a small amount of) data.

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