Re: Raid Chunk Sizes for DSS type DB

On 10/29/07, Joshua D. Drake <jd@commandprompt.com> wrote:
> On Tue, 30 Oct 2007 09:42:37 +0800
> Ow Mun Heng <Ow.Mun.Heng@wdc.com> wrote:
>
> > It's not an optimal setup but since I only have 3x500G drives to play
> > with, I can't build a Raid10, so I'm going for Raid5 to test out
> > capability before I decide on Raid5 vs Raid1 tradeoff. (Raid1 = No
> > Fault tolerance since 3 drives)
> >
>
> Uhhh RAID 1 is your best bet. You get fault tolerance (mirrored) plus
> you get a hot spare (3 drives).
>
> RAID 5 on the other hand will be very expensive on writes.

I agree. Note that at least in linux, you can have >2 disks in a
mirror.  makes reads faster, writes usually not affected too negatvely