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 file that contains the code that is needed to use an attached device.
DHCPv6
The Dynamic Host Configuration Protocol for IPv6. Although IPv6's stateless address
autoconfiguration 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
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.
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 file extension dll, ocs (for libraries that contain activeX controls, or drv
(for legacy system drivers).
DNS Directory Name System. This system 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.
Drive, magnetic tape
A mechanism for moving magnetic tape and controlling its movement.
Drive Not Configured
This message occurs during the first boot after a factory settings restore is run. This message is
not a real issue since it takes time for the library to configure.
DRV Drive.
DSA key
Encryption key type.
DSE Data security erase.
DSP Digital signal processor.
Glossary 159
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