Hi, Thanks Anthony for raising our attention on this. We'll try to do the correlation matrix. In our case, I've seen this since the creation of the cluster 18 months ago with the initial batch of servers whee I would assume that all the drives had the same hardware... Best regards, Michel Sent from my mobile Le 31 mars 2025 17:40:28 Chris Palmer <chris.palmer@idnet.com> a écrit :
Yes, we have found the same. We always re-benchmark iops when a firmware upgrade is done, and ensure that new/replacement drives have a known and tested model/firmware revision.
On 31/03/2025 15:58, Anthony D'Atri wrote:
I'm also wondering why we observe value like 350 on some OSD as the HW is the same on all servers?
Sometimes drive firmware correlates strongly with latency flern, I’ve experienced this with multiple SSD SKUs, especially with latency being inconsistent over time. So that’s one reason that drives within a cluster might behave differently, if some are downrev.
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