Hey,
I have been experimenting with the raid groups and creating aggregates today and am not sure how I want to proceed at the moment. These are the options I have come up with if I split drives evenly across controllers:
1. config is per controller;
6xADP drives to create aggr, add capacity of 5xshelf drives into same RG - This I think treats the shelf drives as the same size as the ADP drives meaning I lose 150GB from each of the shelf drives as well
= 1 spare, 2 parity and 9 x 693.22GB == 5.4TB Aggregate
TOTAL Storage 10.8TB
2. config is per controller;
5xshelf drives to create aggr, add capacity of 6xADP drives (have to be in sep RG due to smaller size) - as the aggr is created with the larger shelf drives the ADP drives have to go in to a separate RG.
= 1 spare, 2 ADP parity, 2 Shelf Parity. 3 x 836.91GB + 3 x 693.22GB == 4TB Aggregate
TOTAL Storage 8TB
Clearly option 1 is more efficient even if I do lose 150GB per drive!
Now, what are my options if I dont do an even split? Can I assign;
12xshelf drives to one controller = 1 spare, 2 parity. 9 x 836.91GB == 6.6TB in Shelf aggr
12xADP drives to other controller = 1 spare, 2 parity. 9 x 693.22GB == 5.4TB in ADP aggr
TOTAL Storage 12TB
Does the above work as far as spares? (i.e. can the ADP spare cover one of the drives that holds the root aggr/partition on either controller?). Are there any other suggestions to maximise storage without losing RAID-DP and spares?
Thanks,