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Any issues using odd # of disk RAID combinations (5D+1P)?

Question asked by B082X3QA on Sep 8, 2015
Latest reply on Sep 10, 2015 by Mark Perino

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.

Thank you!

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