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  3. April 2008

Re: hot spare disk

Greg Wenzloff wrote:
Hi List,

We have a new 525 still in the box and am trying to coordinate the
install. Business partner (Sirious) says that I can not have a hot
spare disk unless using RAID 6.

I'm convinced that I can have that using RAID 5. System has V5R4M5
and a 5727 controller with 6 drives.
I would like one of them to be a hot spare.

Who is correct?

Thanks,
Greg
RAID6 isn't Raid5 with Hot Spare. RAID6 uses 2 drives woeth of parity if you will allowing you to loose '2' drives in the same set and still run as you know. Raid5 with Hot Spare can only loose a Single Drive, BUT it will automagically swap in the the SPARE and start the rebuild. This reduces the unprotected time. Raid6 does this 1 better, sin ceth eset is still protected even if 1 drive fails.


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