Hard Disk IDs in Linux

Barry Roberts blr at robertsr.us
Tue Mar 12 11:47:44 MDT 2013


On Tue, Mar 12, 2013 at 11:35 AM, Corey Edwards <tensai at zmonkey.org> wrote:
>
> On 03/12/2013 10:05 AM, Michael Torrie wrote:
> > Personally, if I had that many disks, I would do RAID10.  Basically
> > that's striping across pairs of RAID1 disks.  Or use sets of 4 disks in
> > a RAID-6 setup, and stripe across them.  Same efficiency as RAID10, but
> > you can lose up to 2 out of any 4 disks.  Either way, 50% efficiency,
> > but I'd sleep way better at night.
>
> I have to agree on RAID10. Disk is cheap; downtime is expensive.

RAID6 is slow.  Rebuilding the array after you lose a 4TB drive is
going to take FOREVER.  After you test that and time it and compare
normal write speeds RAID6-RAID10, if you still want RAID6, have fun.
I suspect you won't.


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