SSD disk write performance plummets after upgrading to RHEL 6.9

Solution Verified - Updated -


  • After upgrading to RHEL 6.9, kernel version 2.6.32-696.6.3, I/O write performance to SSD disks serviced by the hpsa driver is seriously degraded
  • SSD write performance is so slow the processes were hitting the 120 second kernel time out for blocked tasks.
  • Rebooting back into the prior kernel performance was restored to the application.


  • System upgraded from Red Hat Enterprise Linux 6.7 to Red Hat Enterprise Linux 6.9
  • Kernel version upgraded to is 2.6.32-696.6.3
  • HPE Smart Array Adapter (hpsa driver)

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