Glossary - HP 220mx User Manual

Glossary

C-D
cartridge A plastic enclosure that
contains an optical disk. The cartridge
is labeled "A" or "B" to denote separate
sides of the optical disk. The optical
disk is never removed from the
cartridge.
disk See optical disk.
driver A program that allows the
operating system to communicate with a
peripheral device.
M-O
magneto-optical A type of optical
technology which uses a laser to read
from and write to a magnetic layer on an
optical disk. To write, a spot on the
magnetic layer is heated by a laser to a
point where it can be magnetically
altered by the write magnetic head. To
read, a light from the laser is reflected
from the spot. The magnetic alteration
causes the reflected light to be polarized
in one direction (interpreted as a "1") or
the opposite direction (interpreted as a
"0").
multifunction drive An optical disk
drive that supports both rewritable and
write-once optical disks. The drive
detects the disk type by reading a
factory-stamped code on the disk, and
Glossary
automatically determines whether to
operate in rewritable or write-once
mode.
optical disk A term synonymous with
the 5.25-inch magneto-optical disk.
There are two types of optical disks used
in jukeboxes: rewritable and write-once.
R-T
rewritable optical An optical disk
technology in which data can be
repeatedly written using magneto-
optical reading and writing technology.
SCSI An acronym for the Small
Computer Systems Interface.
terminator A resistor array device used
for electrically terminating a SCSI bus.
A SCSI bus must be terminated at its
two physical ends. A peripheral device
uses a terminator only if it is at the end
of the bus.
W
write-once An additional operating
mode available with multifunction
drives. When a write-once disk is
inserted, the drive will write data, but
will not write over data that has been
previously written. This feature is
useful for applications that need
permanent data security and audit trails.
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