IT Firmware for LSI MR9361-8i

TrueNAS General
5

Note that you don’t have to set the card to JBOD personality. You just need to enable “JBOD” when in RAID personality. The 3 options:

  1. JBOD personality: All new disks are JBOD. RAID 0, 1, and 10 options available.
  2. RAID personality, JBOD enabled: All new disks are JBOD. All RAID levels available. Disk must be converted to “Unconfigured Good” to be included in RAID.
  3. RAID personality, JBOD disabled: All new disks are “Unconfigured Good”. All RAID levels available.

What JBOD personality does, according to Broadcom:

At a minimum, a controller in JBOD mode can seamlessly replace an IT-like HBA with no performance impact. In JBOD mode, the adapter provides logistical and operational advantages: It enhances the use of physical drives through better performance.

But, I have found that merely placing a drive in JBOD mode gives you the same level of transparency and performance.

The difference is that the driver for the 9361 is always some form of “megaraid_sas” (in Linux), regardless of the personality, while an LSI HBA would use “mpt?sas” as the driver, with the “?” being the SAS version of the HBA.