We have a HUS 130 on microcode version 0980/D-S. I have a full tray of 24 disks with the same type of drives 600GB 10K SAS.
I wanted to create a DP Pool of RAID 5, with (4) 5D+1P disk combinations as this will utilize the full tray capacity and should provide performance.
In the past (2+ years ago), I thought Hitachi had a best practice for optimal performance for Pools by adding disks in even number combinations (2D, 4D, 6D, etc) or keeping disks to combinations of 4 or 8, meaning 2x2, 4x4, 4x1, 8x1, 8x2.
Is this now no longer the case with my updated firmware version and (4) 5D+1P disk combos would work well?
Also, what is the difference between Shrinking a DP Pool capacity vs Deleting the DP Pool? I have no data/volumes on this pool yet but I need to recreate my disk combinations - not sure if I should select all my RAID groups and "Shrink Pool Capacity" or just delete my entire pool and start fresh.