IBM L5U, Maintenance Information

Page: 281 / 295

Glossary
D-3
deserialize . To change from serial-by-bit to
parallel-by-byte.
detented . A part being held in position with a catch or
lever.
device . Any hardware component or peripheral, such
as a tape drive or tape library, that can receive and send
data.
device driver . A file that contains the code needed to
use an attached device.
DH group . Diffie-Hellman group.
DIAG . Diagnostic section of maintenance information
manual.
differential . See High Voltage Differential (HVD) .
direct access storage . A storage device in which the
access time is independent of the location of the data.
DNS . Directory Name System. This allows the library
to recognize text-based addresses instead of numeric IP
addresses.
download . (1) To transfer programs or data from a
computer to a connected device, typically a personal
computer. (2) To transfer data from a computer to a
connected device, such as a workstation or
microcomputer.
DRAM . Dynamic random-access memory.
drive, magnetic tape . A mechanism for moving
magnetic tape and controlling its movement.
DRV . Drive.
DSA key . Encryption key type.
DSE . Data security erase.
DSP . Digital signal processor.
E
EBCDIC . Extended binary-coded decimal interchange
code.
EC . Edge connector. Engineering change.
ECC . Error correction code.
EEPROM . Electrically erasable programmable
read-only memory.
EIA . Electronics Industries Association.
EIA unit . A unit of measure, established by the
Electronic Industries Association, equal to 44.45
millimeters (1.75 inches).
eject . To remove or force out from within.
EKM . See encryption key manager .
electronic mail . Correspondence in the form of
messages transmitted between user terminals over a
computer network.
e-mail . See electronic mail .
encryption . A method of storing data in a format that
helps protect data from inadvertent or deliberate
compromise.
encryption key manager (EKM) . A Java software
program that assists IBM-encrypting tape drives in
generating, protecting, storing, and maintaining
encryption keys that encrypt information written to and
decrypt information read from tape media.
EPO . Emergency power off.
EPROM . Erasable programmable read only memory.
EQC . Equipment check.
equipment check . An asynchronous indication of a
malfunction.
Error log . A dataset or file in a product or system
where error information is stored for later access.
ESD . Electrostatic discharge.
ESP . Encapsulating Security Payload.
F
fault symptom code (FSC) . A hexadecimal code
generated by the drive or the control unit microcode in
response to a detected subsystem error.
FC . Feature code.
FCC . Federal communications commission.
FE . Field engineer, customer engineer, or service
representative.
fiducial . A target used for teaching a physical location
to a robot.
field replaceable unit (FRU) . An assembly that is
replaced in its entirety when any one of its components
fails.
file . A named set of records stored or processed as a
unit. Also referred to as a dataset.
file protection . The processes and procedures
established in an information system that are designed
to inhibit unauthorized access to, contamination of, or
deletion of a file.