IBM F50 RS/6000 7025 - Manual (Page 233)

Attention: SSA backplanes must be fully populated. Each backplane connector
must have a disk drive or a blank carrier installed at all times. If you remove a
disk drive from a bay and do not replace it with another disk drive, you must
install a blank carrier in that bay.
6. Disconnect the drive from the connector on the backplane, by grasping the
handle on the drive tray and carefully pulling the drive out of the server. Store
the drive in a safe place.
Attention: Handle the disk drive with care as it is very fragile and can be easily
damaged if exposed to shock, ESD, or rough handling.
Chapter 5. Installing Options 5-89