Glossary–3
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.
STRIPE SET
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 where 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.
Summary of Contents for EK-SFXXS-SG-003
Page 1: ...DECarray Service Guide EK SFXXS SG 003 Digital Equipment Corporation ...
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Page 18: ...1 8 Introduction Figure 1 3 SF7x Series Storage Enclosure SHR_X1123C_89 ...
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Page 168: ...6 60 SF7x Storage Enclosure FRU Replacement Figure 6 18 Enclosure Internal DSSI Cables ...
Page 169: ...SF7x Storage Enclosure FRU Replacement 6 61 Figure 6 19 Enclosure Internal DSSI Cables cont ...
Page 170: ...6 62 SF7x Storage Enclosure FRU Replacement Figure 6 20 Enclosure Internal DSSI Cables cont ...
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