Hello Cris,   No. There is never a need to restart the array for a drive firmware upgrade.  The upgrade process will restart those drives one at a time to load the new firmware.  Since they're spares there will be no interruption of I/O.  Only updating the entire array firmware requires a restart.   Regards,   Don 
I have two drives, spares, which are in need of a firmware update.  I have downloaded the update package and am ready to do the firmware update.  Will the update to these spare drives, require the PC6000 to restart?  Thanks, Cris
Drive firmware update