Re: [HPDD-discuss] Disk provisioning for Lustre
On Thu, 04 Apr 2013 07:58:11 -0500
Ray Muno <muno(a)aem.umn.edu> wrote:
Is there any reason I would pick the two sets of RAID6 4+2 over the
one
RAID6 8+2? The latter seems to be the better choice.
If you are going with RAID6 I wouldn't bother with hot spares. The
2*4+2 will have theoretically better performance since there are more
drives involved (instead of 2 sitting idle with a single 8+2).
If you are using an LSI controller there may be other considerations
like "tray protection". If a single tray fails, how many drives in
your raid group are in a single tray?