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<snip>
It depends on how many DASD devices there are. If there are say 40-50
devices then running up to 85% -- 88% might not be a problem, but with 6
devices, you're in for a hard time.
</snip>
Is this so true anymore, about the number of disk arms being so critical?
I hear people speak that mantra all the time yet I've found that the newer
disks, controllers, etc have always amazed me. Many years ago we dropped
a system down from 42 disk arms down to just 7 of the then newer drives
(still spinning disks) and my performance was significantly better.
Recently I've dropped from some lpars each having dozens of their own disk
drives down to 21 storage spaces on a system with only 32 drives (and that
was only 1 of the 5 lpars being guested from this host) and the
performance was much better. Ok, granted, I went from a mix of SSD's and
HDD's to pure SSD's, of a newer generation.
Rob Berendt
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This thread ...
RE: Disk: Percent full a performance factor?, (continued)
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