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One of our sister companies has a Power 8 (8286-42A - V7R1) with a mix of SSD (58B9) & Spinny (19B1) disk.
By capacity, 1/3 is SSD and 2/3 is Spinny.
By count, 11 are SSD and 28 Spinny.
I don't know how many RAID sets.
Am I right in assuming that, given an even spread of data (all show 78% used), they're constrained by the spinny disks and not getting maximum benefit of the SSD's? I don't think any files are pinned to SSD.
They have performance issues, particularly at month-end, and I'm trying to get some talking points for a new Power 9 with all SSD. I think it sells itself just on the maintenance costs but need more ammunition.
Thanks.
Roger Harman
COMMON Certified Application Developer - ILE RPG on IBM i on Power
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