Glossary
Scalar i500 User’s Guide
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include tapes and optical disks. A storage device can be a single
disk drive, or constitute thousands of tapes in a large tape library.
Storage slot
The physical home where a data cartridge resides.
Subsystem status
A feature that provides predictive alerts, warning of
any loss of connectivity or device failure using local or remote
alerts. Subsystem status allows administrators to correct faults
before they affect backup or other data transfer operations.
T
Tape drive
A device that spins disks and tapes while it reads and writes
data in storage.
TCP/IP (Transmission Control Protocol/Internet Protocol)
The
communications protocol used by the Internet. It runs on top of
Ethernet to provide high-level networking services to
applications.
Topology
The logical and/or physical arrangement of stations on a
network.
Trap
An SNMP alert that is sent when predefined conditions are met.
For example, an error trap tests for an error condition and
provides a recovery routine.
U
UDS (Universal Drive Sled)
The hardware that houses Fibre Channel and
SCSI tape drives in a module.
User ID
An alphanumeric value that the password database associates
with a login name. Also, UID.
UTC (Coordinated Universal Time)
The world-wide standard for time,
commonly considered to be the equivalent of “Greenwich Mean
Time” and “Zulu time.” For all of these time standards, zero (0)
hours is midnight in Greenwich England, which lies on the zero
longitudinal meridian. The sequence of the letters in the acronym
is a compromise between the English and French terms (
Temps
Universel Coordonné
).
W
WORM (Write Once, Read Many)
A common type of data storage
medium, in which data can be read and reread, but not altered,
after it has been recorded.
