Glossary
SuperLoader User’s Guide 263
device
According to SCSI specification, up to eight SCSI devices can be
connected to a single SCSI bus. Each SCSI device contains a SCSI ID
number that can be set to 0 through 7.
device driver A low-level (usually kernel-mode) operating system
component that enables a PC to communicate with peripheral devices
such as fixed disk drives, CD-ROMs, and tape drives. Each kind of device
requires a different driver. Device driver programs are loaded into
memory at boot time.
DHCP Dynamic Host Configuration Protocol. Software that
automatically assigns IP addresses to client stations logging onto a TCP/
IP network.
differential A term referring to the electrical characteristics of the signal
used on the SCSI bus interface. Differential signals minimize the effect of
common mode signal noise and allow the SCSI bus to operate reliably
over greater distances at a higher speed.
domain A group of computers, programs, and devices on a network
administered as a unit with common procedures and rules for use by a
specific group of users. A user logs on to the domain to gain access to the
resources.
driver A software program allowing the operating system to control a
device such as a library, printer, or video card. Many devices do not
respond properly if the correct driver is not installed in the computer.
E
ECC Error Correction Code, also known as Error Checking and
Correction. The incorporation of extra parity bits in transmitted data in
order to detect errors that can be corrected by the controller.
EDC Error Detection Code. DLT tape drives include a 16-bit EDC with
every 4 KB of user data. The EDC helps the drive detect and recover any
errors that may occur.
EEPROM Electronically-Erasable Programmable Read Only Memory. An
integrated circuit memory chip that can store programs and data in a
non-volatile state. These devices, which are used to store firmware in
DLT tape drives, can be erased and reprogrammed with new data.
EMI Electromagnetic Interference. Electrical interference caused by
electromagnetic radiation.
encoding The protocol by which particular data patterns are changed
prior to being written on the tape surface as a pattern of On and Off or 1
and 0 signals.
erase The removal of data from a piece of media.
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