System Components
2-15
XMI PIUs
A maximum of two XMI PIUs can be installed in the system cabinet. Each
XMI PIU has 14 slots. Twelve slots can contain the following modules:
CIXCD, DEMFA, DEMNA, KDM70, KFMSA (for VAX 7000 systems), and
KZMSA (for DEC 7000 systems). One module must be installed in slots 1
or 14. Slot 7 contains the clock module, and slot 8 contains the DWLMA
module.
SCSI PIU
DSSI PIU
Battery PIUs
The system can be equipped with an optional battery PIU to provide unin-
terrupted power in case of a power failure. Each regulator requires a bat-
tery pack that is mounted in the bottom of the system cabinet. The battery
PIUs provide a minimum of 8 minutes of full system operation when fully
charged and nominally provide 11 minutes of full system operation.
In-Cabinet Tape Drive
A TLZ06 tape drive can be installed in the SCSI PIU in the DEC 7000 sys-
tem cabinet. A TF85 tape drive can be installed in the VAX 7000 system
cabinet. The tape drive can be used as a backup storage device or as an I/O
device for user applications.
DEC
7000
Up to two SCSI PIUs can be installed in the DEC 7000 system
cabinet (along with the XMI PIU). A SCSI PIU can have two
shelves. Each shelf holds up to seven SCSI disks or tapes: RZ26,
RZ73, and TLZ06.
VAX
7000
Up to two DSSI PIUs can be installed in the VAX 7000 system
cabinet (along with the XMI PIU). A DSSI PIU contains up to
three storage array building blocks (SABB). Each SABB can con-
tain two RF73 disks.