[geeks] RAID quirks and terminology

[Phil Stracchino]

On 06/15/14 11:25, Mouse wrote:
>> i recall reading years ago that if you tried to mirror a pair of
>> stripes, disksuite would silently rearrange itself into the more
>> failsafe stripe of mirrors.
> 
> What did it do if you (say) tried to mirror between a stripe of 3 disks
> of size 2X and a stripe of 2 disks of size 3X?

I did a rather unconventional mirror-and-stripe once that wasn't
strictly RAID10, to get a 2-way mirror out of three disks.  Let's call
the drives A, B, C.  All were the same size.  I split each drive into
two partitions, then mirrored the partitions like so:

[ A1 | A2 | C1 ]
[ C2 | B1 | B2 ]

then striped the three mirrors.  I had full redundancy in each mirror,
and no single drive failure could cause any mirror to fail.

I don't know what the hell you'd properly call it.  :)


-- 
  Phil Stracchino
  Babylon Communications
  phils at caerllewys.net
  phil at co.ordinate.org
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