From the link i cannot see ontap version, can i assign more disks per aggregate with 8.x version on this model? And if i can, what do you think of an idea to create 2 large aggregates (one per filer)? I would get more space, but will this overload CPU's and cache on filers?
So i need some advices from your experience : 3x15 disks aggregates per filer, or larger aggregates (ofc if supported - lets say 45 disks aggregate with 2 spares)
Actually with 32-bit aggregates (pre-ONTAP 8 & ONTAP 8.x as well), you can have up to 33x 600GB drives in one aggregate. With 64-bit aggregates (ONTAP 8.x), you can have up to 105x 600GB drives in a single aggregate on FAS3160.
This doc explains a lot of detail around RAID group sizes, aggregate limits, spares policies, etc: