Use these rules for renumbering your storage devices.
• For each DSSI bus, do not duplicate bus node numbers for your storage
devices/adapters. For Bus 0, you can have only one device identified as
node 0, one device as 1, and so on. For Bus 1, you can have only one device
identified as node 0, one device as 1, and so on.
• That rule also applies to DSSI VAXcluster configurations. All DSSI bus node
numbers for storage devices and DSSI adapters must be unique in a shared
DSSI bus.
• The EF/RF-series ISEs are numbered in increasing order from right to left
beginning with zero.
• DSSI adapters use the highest available bus nodes. The next highest
available node (usually five) is reserved for a TF-series tape drive.
• If more than one DSSI bus is used and your system is using a nonzero
allocation class, assign new Mass Storage Control Program (MSCP) unit
numbers for devices on all but one of the DSSI buses. The unit numbers
for all DSSI devices connected to a system’s associated DSSI buses must be
unique. Refer to Appendix B for more information on setting parameters for
DSSI devices.
Note
If you change the bus node ID plugs while your system is operating,
you must turn off the system and then turn it back on for the new plug
positions to take effect.
3.1.2 TF-Series Tape Drive
The TF-series tape drive is behind the upper door of your system. To use the
drive, turn the key to the top position and open the door.
The tape drive holds one removable magnetic tape cartridge.
• The drive can read data written on a CompacTape III, CompacTape II, or
CompacTape cartridge.
• The drive cannot write to a CompacTape II or CompacTape cartridge.
• You must use a CompacTape III cartridge to make copies or backups of
software or data.
3–10 Operating the System Options
