IBM F50 RS/6000 7025 - Manual (Page 195)

Installing a SCSI Disk Drive in Bank C, D, or E.
Notes:
SCSI IDs are automatically assigned by the backplane for each bank.
Therefore, no address jumpers are required on the drives.
1.6 inch half-high (9.1 GB) drives require two bays for each drive.
SCSI disk drives and SSA disk drives are not interchangeable.
Before installing disk drives in bank D, you must also order:
– A disk drive backplane for bank D.
Before installing disk drives in bank E, you must also order and install:
– A disk drive backplane for bank E
– A SCSI PCI adapter that drives Bank E.
– A SCSI cable that connects the SCSI PCI adapter to Bank E.
To order, contact your authorized reseller or marketing representative.
After the backplane is completely installed, you do not have to turn off the
system to install additional hot-swappable disk drives. However, you
must turn off the system when performing the steps that involve installing
or removing backplanes, cables, adapters, memory, and CPU cards.
Chapter 5. Installing Options 5-51