Glossary - Dell PowerVault 130T DLT Service Manual

PowerVault 130T Service Manual

Glossary

This glossary defines new or special terms.
For definitions of other terms about other
products refer to the glossary in the appropriate
document.
A
A Ampere
AC Alternating current.
algorithm An ordered set of well–defined
rules used to govern an operation.
ANSI American National Standards Institute.
ASCII American Standard Code for
Information Interchange.
audit (1) For a library, a part of its IPL
sequence that catalogs all cartridge locations
within the library cells and retains the data in
the CYC card's memory. (2) For a host, its
request to catalog the cartridges in a library by
library number, VOLSER, panel, row, and
column.
B
BTU British thermal unit.
Bus (1) A facility for transferring data
between devices on a common connection. (2)
An interface.
byte An 8–bit binary character.
C
C Centigrade
CAP. See
cartridge access port.
cartridge. The plastic housing around the
tape. A plastic leader block is attached to the
tape for automatic threading when loaded in a
transport. The spine of the cartridge contains a
VOLSER label listing the volume
identification number.
cartridge access port (CAP)
that allows an operator to enter/eject one
cartridge during automated operations. The
operator can open the CAP and place a
cartridge into the CAP cell. The CAP is
located on the left front door of the library.
cartridge tape.
plastic housing.
cell Storage location for a cartridge tape.
channel A device that connects the host and
main storage with the input and output CUs.
configuration. The description of an library,
listing the panel types and drives.
CRU
Customer Replaceable Unit
CYC card.
communication to a host, library control
signals to and from the robot, and servo
control to library motors.
CYH card. An interface between the CYC
card and reach mechanism; this card controls
cartridge movements in the library
CYO card. Operator panel interface.
D
DC Direct current.
device A host adapter or control unit attached
to the SCSI bus.
diagnostic tests
library operator panel, that allow a local user
to run offline tests within the library
differential A SCSI bus alternative with a
maximum cable length or 25 meters (82 feet).
disabled (1) Inactive. (2) Off.
DLT Digital linear tape.
E
enabled (1) Active. (2) On.
F
F Fahrenheit
Preliminary 9/11/98
An assembly
.
Magnetic tape enclosed in a
.
Main processor card for library
.
Tests, accessible through the
.
Glossary
.
G–1