Lower IOPS When First Test about diskspd HOT 2 CLOSED

This could be coming from anywhere, That aside, these results are within a half percentage point.

Handful of ideas/observations:

The default warmup (-W) is five seconds, and a 10 second write test on an SSD is nowhere near enough to reliably get to steady state operation. It makes you very vulnerable to uncontrolled behavior (inside the SSD or otherwise).

If IOMETER has no warmup interval it may be including behavior which DISKSPD is excluding with its warmup (1 or 5 seconds, or whatever you may choose next). If you want steady state, my suggestion would be to warm up for at least minute (60s) and then measure for 10s: -W60 -d10. Industry practice would be closer to five minutes warmup.

Do the same with IOMETER and the variance should be small & results repeatable.

from diskspd.

Closing due to no response. Please reopen if you have more questions.

from diskspd.