Installation guide

Glossary–3
NODE NAME
A 6-character (maximum) value that is assigned to each DSSI ISE. The
node name of each ISE must be unique across the system topology.
OCP
Operator control panel. An enclosure interface that allows remote control
of DSSI node ID selection and ISE operating status.
PARAMS
A local program resident on the ISE. PARAMS is used to view and modify
current device parameter settings on an ISE.
PATH
A channel from the host to a device.
RBN
Replacement block number. The last sector on each track of the host
accessible area reserved for bad block replacement.
RCT
Replacement and caching table. Used to store pointers to replaced blocks
in the RBN area.
RF72
A 1-gigabyte capacity DSSI disk ISE.
RLL
Run length limited. The format used in the DSSI ISE to record data.
SF72
A DSSI storage enclosure that houses either two or four RF72 ISEs.
SF200
DSSI storage array that houses up to six SF72 enclosures and up to two
DSSI magazine tape subsystems.
SINGLE-HOST
Storage configuration where DSSI ISEs are connected to only one DSSI
adapter and host system.
SPLIT-BUS
A mode of operation where the ISEs in the right side of an SF72 enclosure
are connected to a different DSSI bus than those on the left side. In this
mode, the DSSI buses are terminated by the TTM.