Users Guide

DCS
Designated Cleaning Slot.
degauss
To make a magnetic tape nonmagnetic by using electrical coils that carry currents that neutralize the
magnetism of the tape.
degausser
A device that makes magnetic tape nonmagnetic.
degradation
A decrease in quality of output or throughput or an increase in machine error rate.
degraded
Decreased in quality of output or throughput or increased machine error rate.
DES
Data Encryption Standard. A cryptographic algorithm designed to encrypt and decrypt data using a
private key.
deserialize
To change from serial-by-bit to parallel-by-byte.
detented
A part that is held in position with a catch or lever.
device
Any hardware component or peripheral device, such as a tape drive or tape library, that can receive
and send data.
device driver
A le that contains the code that is needed to use an attached device.
DHCPv6
The Dynamic Host Conguration Protocol for IPv6. Although IPv6's stateless address
autoconguration removes the primary motivation for DHCP in IPv4, DHCPv6 can still be used to
statefully assign addresses if the network administrator wants more control over addressing.
DH group
Dife-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.
display contrast
The brightness of the display on the Operator Panel.
DLL
Dynamic Link Library. The Microsoft implementation of the shared library concept. These libraries
usually have the le extension dll, ocs (for libraries that contain activeX controls, or drv (for legacy
system drivers).
DNS
Directory Name System. This allows the library to recognize text-based addresses instead of numeric
IP addresses.
download
To transfer programs or data from a computer to a connected device, typically a personal computer.
To transfer data from a computer to a connected device, such as a workstation or personal computer.
DPF
Data Path Failover.
DRAM
Dynamic random-access memory.
Glossary
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