[rescue] Ultra 2 upgrade question...
ssandau at gwi.net
Tue Apr 5 23:29:24 CDT 2005
Devin L. Ganger wrote:
> on 4/5/2005 4:13 PM velociraptor wrote:
>> 0+1? I can never remember the order
> The first number is the RAID method being used for the first layer of
> protection, so 0+1 is a pair of stripes put into a mirrored volume,
> while 1+0 is mirrored disks placed into a stripe.
> 1+0 guards against twice as many failure scenarios, is more resistant
> against multiple disk failures (one per mirrored pair), and requires
> less time to rebuild when failed disks are replaced.
Yes. I remember by thinking that RAID 0 is "no RAID" while RAID 1 is the
simplest of RAIDs, i.e. a mirror.
And as far as SDS goes, I have looked all over for a method to
explicitly create a RAID 1+0, but all that SDS allows is RAID 0+1.
However all the docs and posts I have found indicate that a RAID 0+1
created with SDS will indeed function like a RAID 1+0. We'll see what
happens when the first disk in my D5200 fails.
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