Re: Questions about RAID 6

[Mark Allums <mark@allums.com>]

On 4/26/2010 2:29 PM, Stan Hoeppner wrote:
> Mark Allums put forth on 4/26/2010 12:51 PM:
>
> > Put four drives in a RAID 1, you can suffer a loss of three drives.
>
> And you'll suffer pretty abysmal write performance as well.
>
> Also keep in mind that some software RAID implementations allow more than
> two drives in RAID 1, most often called a "mirror set".  However, I don't
> know of any hardware RAID controllers that allow more than 2 drives in a
> RAID 1.  RAID 10 yields excellent fault tolerance and a substantial boost to
> read and write performance.  Anyone considering a 4 disk mirror set should
> do RAID 10 instead.


Yeah.  All good points.

I never make things clear.  OP was thinking of doing software RAID with 
Linux md raid.  Most of what I meant to say was/is with that in mind.


MAA