In the first place I meant the BIOS version on the motherboard, is that on latest available from Intel?
As the LSI controller is onboard the firmware for that will get upodated with the BIOS, I guess.
Besides the output of "esxcfg-scsidevs -l" shows the RAID as being "degraded" (SCSI Level: 5 Is Pseudo: false Status: degraded) this is something you should investigate first.
It might also not be a good idea to run a RAID5 with SSDs in general.