Accusys ExaSAN A12S2-PS - Manual (Page 104)

4. How to Use
User Guide Page 4-53
2. Update System Code, Boot Code, BIOS/EFI individually from the download path.
During the update process, the RAID system will stop all data access.
Caution
Do NOT interrupt or stop updates that are in progress.
3. Once the updates are complete, make sure to power off the ExaSAN RAID system
and host using the proper power down sequence and then power on, again
following the proper power on sequence.