true, but with so many drives per raid group, you have an increased chance of two disks failing at a time. Since you have to have two volumes anyway, you'd be better off evening out the raid groups. In your config, the raid group with 7 disks would be quite a bit slower than a raid group with the "recommended" (13 or 14) amount of disks. (True you lose a disk for parity, but, that's life.)

-corris

see these two docs:

http://www.netapp.com/tech_library/3008.html (figure 3) http://www.netapp.com/tech_library/3027.html

On Thu, 4 May 2000, Sateesh Mucharla wrote:

Date: Thu, 4 May 2000 12:20:57 -0700 (PDT) From: Sateesh Mucharla sateesh@ampere.nsc.com To: toasters@mathworks.com Subject: Raid groups

I am buying a F760 with 35 drives (all 36GB).

As there is limitation of 28 drives per raid group ( i read it NetApp Sysadmin manual), i am thinking of having two raid groups one with 26 and the other with 7 drives. Rest two will be hot spares. But i am open for better configuration.

I would like to know whether i can configure all 33 drives into one raid group - Is that possible? If so what are the disadvantages. (With 33 drives in one raid group, i loose only one drive as a parity drive - this is an advantage).

Can somebody suggest a better configuration ?

Thanks

Sateesh Mucharla National Semiconductors