LSI megaraid_sas degraded write performance after kernel update

Solution Verified - Updated -

Issue

  • LSI megaraid_sas degraded write performance after updating from kernel-2.6.32-696.3.2.el6 to kernel-2.6.32-696.10.3.el6.

Environment

  • Red Hat Enterprise Linux 6
  • PERC H310 Mini JBOD mode
03:00.0 RAID bus controller: LSI Logic / Symbios Logic MegaRAID SAS 2008 [Falcon] (rev 03)
megaraid_sas 0000:03:00.0: Controller type: iMR

                Supported PD Operations
                ================
Enable JBOD                             : Yes

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