We are replacing a failed 36GB SAS drive in a RAID5 array with a replacement that's several firmware levels below the working drives and wish to bring it up to the level of the others. Must this be performed offline? The box is a HP Proliant DL360 G5 and the drive is HP model DG036A8B53. OS is W2K3. The system admin says we need to perform the update offline but HP's site does not indicate this is necessary.