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end of block (EOB)
data security erase (DSE)
A random binary pattern over-writing existing data from the point of an Erase
command to the end-of-tape.
data tape
A data cartridge formatted for use as a regular data tape for the system in which it is
used.
data tracks
The regions of recorded tape containing user data formed as discreet longitudinal
tracks (similar to railroad tracks).
diagnostics
Pertaining to the detection and isolation of errors in programs and faults in
equipment.
DPKM
See data path key management.
drive
A drive controls the movement of the tape and records or reads the data on the tape as
desired by the customer.
DSE
See data security erase.
dump
To copy the contents of all or part of storage to collect error information.
dynamic host configuration protocol (DHCP)
A network protocol that enables a server to automatically assign an IP address to
devices on a network. DHCP assigns a number dynamically from a defined range of
numbers for a given network.
dynamic world wide name (dWWN)
A feature that applies dynamic names to network devices rather than fixed names.
When a dWWN-named device is replaced, it is assigned the same WWN as the one it
replaced, preventing re-configuration of the network.
emulation
The use of programming techniques and special machine features to permit a
computing system to execute programs written for another system. (IBM)
encryption
The translation of data into a secret code. Encryption is one of the most effective ways
to achieve data security. To read an encrypted file, you must have access to a special
key or password that enables you to decipher it.
end of block (EOB)
A code that marks the end of a block of data. (IBM)
Glossary-3
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