You may occasionally need to update the BIOS and firmware on your servers' HBA controllers. Below is a sample process that can be followed for the LSI9300-8i SAS3008 series of HBA controllers when you don't have a lot of cards to update.
NOTE: There is the potential with some HBA controllers that you could brick the unit if the flash is not performed correctly or if you're using an incorrect firmware/BIOS version. Use the below procedure at your own risk.
1) Download desired firmware from HBA MFR or OEM website and copy new firmware/BIOS images and DOS flash utility to the DOS-booting USB stick's top directory.
2) List the HBA controller(s) that is/are present. Take down the Num, Ctlr, FW Ver, NVDATA, x86-BIOS ver and PCI Addr for later comparison.
3) Upload to USB disk the complete contents of the current flash on the HBA controller. The wording in the quick ref guide is a bit confusing because you're actually downloading current flash contents of the controller to your USB disk to save in case you biff something. You can also use the -ubios, -ufirmware, -ufwbackup and -unvdata flags to retrieve the individual items.
sas3flsh.exe -o -uflash current.rom
4) Flash the new BIOS image to the HBA controller.
sas3flsh.exe -b mptsas3.rom
5) Flash the new firmware to the HBA controller.
sas3flsh.exe -o -f NEWFW.bin
6) Re-run this command to confirm updated versions. Note the changed info.
7) Remove your USB stick and reboot the server to confirm the updated HBA BIOS/FW operates as expected. If any issues, use your current.rom flash backup to restore the HBA to its original state.
Reference: Flashing firmware and BIOS on LSI SAS HBAs: https://www.broadcom.com/support/knowledgebase/1211161501344/flashing-firmware-and-bios-on-lsi-sas-hbas