Installation guide

split-bus
A mode of operation where the ISEs in the one side of a storage enclosure are
connected to a different DSSI bus than those on the other side.
stripeset
A set of disk drives operating in concert as a single virtual disk so as to
provide increased I/O performance. In a DSSI bus application, all SF7x storage
enclosures are in split-bus mode and each half of each enclosure is connected
to it’s own dedicated DSSI adapter port.
through-bus
A mode of operation when all the ISEs in an storage enclosure are connected
to the same DSSI bus. In this mode, the DSSI bus is terminated using an
external terminator.
TMSCP
Tape Mass Storage Control Protocol. Application layer protocol that is used by
the system to perform tape I/O operations and I/O control functions.
TTM
Transition termination module. A PC board that provides connection between
the storage enclosure OCP and RF series disk ISE, and also provides DSSI bus
termination when in split-bus mode.
unit number
Also called the MSCP/TMSCP unit number. Default value is the ISE’s DSSI
node ID. A unique value can be selected using PARAMS.
VAX Diagnostic Supervisor
A diagnostic environment that allows access to DSSI tests and programs in
VAX 6000 and 9000 series systems.
virtual circuit
A logical point-to-point link between nodes.
XMI
Extended Memory Interconnect. The system bus for the VAX 6000 and 9000
series systems.
Glossary–4