If it was me I would use 2 disks as vol0 and not keep any business critical data on it, and use the remaining disks in vol1 (with 9 disks per RAID group) with 1 disk as spare. You would be very unlucky to need 2 spares! I have 1 spare for my 28 disks. Reconstruction time shouldn't be much of an issue should it?
Matt
devnull@adc.idt.com wrote:
I am trying to decide on the number of volumes for our F810 which has a DS14 shelf(FC-AL), with 14 36G drives.
By default Ontap puts 8 disks in a RAID group.
I guess i am trying to figure out if
I should have 2 volumes vol0 and vol1, one with 8 disks and one with 5 disks and i have ONE spare for both the volumes (Is this safe in terms of ratio of disks used to spares ? )
Have 2 volumes(6 + 6) and 2 spares
Have 1 volume with 13 disks and 1 spare. (reconstruction time on failed disk would be high, and i dont know if there will be performance issues esp in calculating parity etc)
Other suggestions are welcome too.
Many Thanks,
Regards,
/dev/null