I checked the NOW site, and didn’t really find anything that seemed pertinent for 7.23 in regards to setting up number of spindles for raid DP.  I did read the 7.2 storage mgmt guide btw .  Here is my situation:

I brought over 3 shelves from some older heads, and hot added to a current loop. Shelves 2-4.  Shelf 1 was already provisioned with 72GB disks.  Currently, I have 1 aggregate of 3 disk (root vol), and 9 disks for another aggregate; 2 hot spares  (full 72gb shelf, shelf 1)

Here is my question.

What is the best layout for raid dp for my new 3 shelves I just added?  I do not want to add the 3 new shelves to the existing aggregate.

I know the default is 16 when creating a new aggr, maybe I should default to that.  I don’t know if I will be adding more disks in the future to this aggregate.

Shelf 4  I have 1 shelf of 144gb 15k  (14 spindles)             new     

Shelf 3  I have 1 shelf of 72gb 15k (14 spindles)                new

Shelf 2  I have 1 shelf of 72gb 10k (14 spindles)                new

Shelf 1  I have 1 shelf of 72gb 15k (14 spindles)                already provisioned

I want to dedicate at least 1 or 2 hot spares for the 144gb (obviously).  I already have 2 hot spares from shelf 1.

I care more about performance then raid reconstruct in the event of a disk failure.  This aggregate will be used primarily for CIFS.

If I missed a document that discusses this better, please let me know.

Thanks!!