Since you mentioned problem does not happen on Windows, what do you use
to emulate the workload (iometer ?)
CrystalDiskMark, HD Tune, ATTO Disk Benchmark
Tested for 2-3 hours, but got stable results. Directly afterwards booted
Live CD with Linux and immediately got poor results.
and did you see the same behaviour with other Kernel versions like
2.6.32.
I did not test this, as this kernel version wouldn't work for me anyway.
If you think it would be very important datapoint, I can try.
You may want to check the per device queue configuration, lsscsi -L
"queue_depth=256", same for all disks
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