Hello folks,
Wellk we got our new replacement Netapp system. It is 8060, two controllers in one box. Unfortunatelly, number of drives came less than I expected - 4 shelves, 900GB 10K SAS drives.
My goal is to minimize number of wasted disk. With 7-mode we've been running for last 5 years without a problem, we have just one aggregate per filer, which has root volume and data volumes as well. There are 3 shelves attached per filer (6 total), coming with 72 15K 450GB drives. I had 2 spare drives for the whole system, and configured 28 disk per RG to maximize the space/capacity. As I said, it worked fine.
Now, with the new system and even with 9.1, do I understand correctly that I have no choice to allocate 3 disk for root aggregate per node and dedicate one spare drive for the root aggregate AND one more - for data aggregates for each node? In other words, from 48 disks available per node, 3 goes to the root aggregate with one spare, one more spare to data aggregate, 4 disks dor DP (two RAID groups for data aggregate) and as a result, only 48-9=39 data disks?
Is above calculation correct?
Is there a way to minimize wasted disks?
Thanks,
P.S. Why can't Netapp have the option to have shared root aggregate for the cluster? Why it has to be per node? Or even - why I has to be on disks - either SAS or flash? Why it can't be build on montherboard/NVRAM/Flash and be completely independed from data shelves/drives?