Dell TL2000 manual Differential. See High Voltage Differential HVD

affects host reporting of density and is included to support legacy needs for transparency. The default of not masking encrypted densities means that the host can see a different density code for encrypted vs non-encrypted tapes (x72 [enc] as opposed to x52 [non-enc]). This feature masks this so the drive reports the primary density only. Normally this is set to the drive default (which is to show encr density). If a legacy setup will not work with a new density code being reported [for whatever software reason] this will allow transparent encryption to still be used.

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.

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 desires more control over addressing.

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. On the Operator Control Panel (OCP), the brightness of the display can be set by setting the contrast from 1 (the brightest) to 10 (the lightest).

dll. Dynamic link library: Microsoft’s implementation of the shared library concept. These libraries usually have the file extension DLL, OCX (for libraries containing ActiveX controls), or DRV (for legacy system drivers).

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.

Drive Not Configured. This message occurs during the first boot after a factory settings restore is executed. This is not a real issue since it takes the library a while to configure.

DRV. Drive.

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. The Encryption Key Manager application

EKM Server Settings. Maintaining primary and secondary EKM servers is desired for maximum availability of encrypted backup and recovery. These settings are required for Library Managed Encryption only.

electronic mail. Correspondence in the form of messages transmitted between user terminals over a computer network.

email. See electronic mail.

encryption. To alter (a file, for example) using a secret code so as to be unintelligible to unauthorized parties. An encryption enabled drive contains the necessary hardware and firmware to encrypt and decrypt host tape application data. Encryption policy and encryption keys are provided by the host application or host server.

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.

Glossary H-3