[CentOS] Re: Raid5 issues
David A. Woyciesjes
david.woyciesjes at yale.edu
Thu May 3 18:37:34 UTC 2007
Toby Bluhm wrote:
> Russ wrote:
>> ...
>> I would like to set up raid 10 instead, but it doesn't seem like its
>> supported by my mdadm - the proper personalities are not loaded. How
>> do I get the raid10 personality in there?
> I don't believe there's a raid10 personality. What you would do is build
> your 2 stripe sets, then mirror those striped md's...
Actually, you have it backwards. Build 2 separate mirror sets, then
make a stripe set of those 2 mirrors.
Here's why: In your setup, if one drive fails, that whole stripe set is
down for the count. You're then running on only 2 drives, no redundancy.
The other way, if one drive goes, the other drive in that mirror set
keeps going; you're still using 3 drives.
Hopefully I explained it clearly... :)
--
--- David Woyciesjes
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