Broadcom (previously LSI) has a dedicated firmware for some of its SAS Host Bus Adapter controllers that might be required when external multi-path (MPIO) configurations are being implemented. It was created to increase the responsiveness of the topology during the event of a cable pull, IOM/ESM reset, or a drive pull. Broadcom recommends upgrading the controllers, otherwise, they might cause problems. In some cases, it’s necessary to update the backplane firmware as well.
