IBM 3580-L23 Setup Guide - Page 138

Small Computer Systems Interface-2 SCSI-2., Ultrium Tape Drive.

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v Fast/Wide SCSI: Uses a 16-bit bus, and supports data rates of up to 20 MBps. v SCSI-1: Uses an 8-bit bus, and supports data rates of 4 MBps. v SCSI-2: Same as SCSI-1, but uses a 50-pin connector instead of a 25-pin connector, and supports multiple devices. v Ultra SCSI: Uses an 8- or 16-bit bus, and supports data rates of 20 or 40 MBps. v Ultra2 SCSI: Uses an 8- or 16-bit bus and supports data rates of 40 or 80 MBps. v Ultra3 SCSI: Uses a 16-bit bus and supports data rates of 80 or 160 MBps. v Ultra160 SCSI: Uses a 16-bit bus and supports data rates of 80 or 160 MBps. Small Computer Systems Interface-2 (SCSI-2). See Small Computer Systems Interface (SCSI). status light. Located on the front of the 3580 Ultrium 2 Tape Drive, a light-emitting diode (LED) which represents information about the state of the tape drive. The light can be green or amber, and (when lit) solid or flashing. storage environment. The temperature, relative humidity rate, and wet bulb temperature of the environment in which the 3580 Ultrium 2 Tape Drive is nonoperational and being kept for future use. T TapeAlert. A patented technology from Hewlett-Packard that monitors the status of a tape device and media, and detects problems as they occur. TapeAlert flags. Status and error messages that are generated by the TapeAlert utility and display on the host console. tape cartridge. A removable storage device that consists of a housing containing belt-driven magnetic tape wound on a supply reel and a takeup reel. tape drive. See IBM Ultrium 2 Tape Drive or 3580 Ultrium 2 Tape Drive. terminator. (1) A part used to end a SCSI bus. (2) A single-port, 75- device that is used to absorb energy from a transmission line. Terminators prevent energy from reflecting back into a cable plant by absorbing the radio frequency signals. A terminator is usually shielded, which prevents unwanted signals from entering or valid signals from leaving the cable system. toggle switch. A device that can alternate between two modes. track. A linear or angled pattern of data written on a tape surface. transfer rate. See data transfer rate. U U. Pertaining to the rack that houses a 3580 Ultrium 2 Tape Drive, the amount of space between two holes in a mounting rail. One U is equal to 4.45 cm (1.75 in.). Ultra SCSI. See Small Computer Systems Interface (SCSI). Ultra-2 SCSI. See Small Computer Systems Interface (SCSI). Ultrium Tape Drive. See IBM Ultrium 2 Tape Drive. unattended backup. The act of copying files without operator assistance. uniform resource locator (URL). The address of an item on the World Wide Web. It includes the protocol followed by the fully qualified domain name (sometimes called the host name) and the request. The web server typically maps the request portion of the URL to a path and file name. For example, if the URL is http://www.networking.ibm.com/nsg/nsgmain.htm, the protocol is http; the fully qualified domain name is www.networking.ibm.com; and the request is /nsg/nsgmain.htm. unload. Following insertion of a tape cartridge into a tape drive, the act (performed by the tape drive) of rewinding the tape into the cartridge and ejecting the cartridge from the drive. unload button. Located on the front of the 3580 Ultrium 2 Tape Drive, a multi-purpose push button that (depending on how it is pressed) can rewind and unload a tape cartridge, place the tape drive in maintenance mode, scroll through maintenance functions, or exit maintenance mode. URL. Uniform resource locator. V Vac. Volts of alternating current. Vdc. Volts of direct current. void. In character recognition, the inadvertent absence of ink within a character outline. volt. The SI (international) unit of potential difference and electromotive force, formally defined to be the difference of electric potential between two points of a conductor carrying a constant current of one ampere, when the power dissipated between these points is equal to one watt. voltage. The electric potential or potential difference expressed in volts. 122 IBM 3580 Ultrium Tape Drive Setup and Operator Guide

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v
Fast/Wide SCSI: Uses a 16-bit bus, and supports data
rates of up to 20 MBps.
v
SCSI-1: Uses an 8-bit bus, and supports data rates of
4 MBps.
v
SCSI-2: Same as SCSI-1, but uses a 50-pin connector
instead of a 25-pin connector, and supports multiple
devices.
v
Ultra SCSI: Uses an 8- or 16-bit bus, and supports
data rates of 20 or 40 MBps.
v
Ultra2 SCSI: Uses an 8- or 16-bit bus and supports
data rates of 40 or 80 MBps.
v
Ultra3 SCSI: Uses a 16-bit bus and supports data
rates of 80 or 160 MBps.
v
Ultra160 SCSI: Uses a 16-bit bus and supports data
rates of 80 or 160 MBps.
Small Computer Systems Interface-2 (SCSI-2).
See
Small Computer Systems Interface (SCSI)
.
status light.
Located on the front of the 3580 Ultrium
2 Tape Drive, a light-emitting diode (LED) which
represents information about the state of the tape drive.
The light can be green or amber, and (when lit) solid or
flashing.
storage environment.
The temperature, relative
humidity rate, and wet bulb temperature of the
environment in which the 3580 Ultrium 2 Tape Drive is
nonoperational and being kept for future use.
T
TapeAlert.
A patented technology from
Hewlett-Packard that monitors the status of a tape
device and media, and detects problems as they occur.
TapeAlert flags.
Status and error messages that are
generated by the TapeAlert utility and display on the
host console.
tape cartridge.
A removable storage device that
consists of a housing containing belt-driven magnetic
tape wound on a supply reel and a takeup reel.
tape drive.
See
IBM Ultrium 2 Tape Drive
or
3580
Ultrium 2 Tape Drive
.
terminator.
(1) A part used to end a SCSI bus. (2) A
single-port, 75-
±
device that is used to absorb energy
from a transmission line. Terminators prevent energy
from reflecting back into a cable plant by absorbing the
radio frequency signals. A terminator is usually
shielded, which prevents unwanted signals from
entering or valid signals from leaving the cable system.
toggle switch.
A device that can alternate between
two modes.
track.
A linear or angled pattern of data written on a
tape surface.
transfer rate.
See
data transfer rate
.
U
U.
Pertaining to the rack that houses a 3580 Ultrium 2
Tape Drive, the amount of space between two holes in
a mounting rail. One U is equal to 4.45 cm (1.75 in.).
Ultra SCSI.
See
Small Computer Systems Interface
(SCSI)
.
Ultra-2 SCSI.
See
Small Computer Systems Interface
(SCSI)
.
Ultrium Tape Drive.
See
IBM Ultrium 2 Tape Drive
.
unattended backup.
The act of copying files without
operator assistance.
uniform resource locator (URL).
The address of an
item on the World Wide Web. It includes the protocol
followed by the fully qualified domain name
(sometimes called the host name) and the request. The
web server typically maps the request portion of the
URL to a path and file name. For example, if the URL
the protocol is http; the fully qualified domain name is
www.networking.ibm.com; and the request is
/nsg/nsgmain.htm.
unload.
Following insertion of a tape cartridge into a
tape drive, the act (performed by the tape drive) of
rewinding the tape into the cartridge and ejecting the
cartridge from the drive.
unload button.
Located on the front of the 3580
Ultrium 2 Tape Drive, a multi-purpose push button that
(depending on how it is pressed) can rewind and
unload a tape cartridge, place the tape drive in
maintenance mode, scroll through maintenance
functions, or exit maintenance mode.
URL.
Uniform resource locator.
V
Vac.
Volts of alternating current.
Vdc.
Volts of direct current.
void.
In character recognition, the inadvertent absence
of ink within a character outline.
volt.
The SI (international) unit of potential difference
and electromotive force, formally defined to be the
difference of electric potential between two points of a
conductor carrying a constant current of one ampere,
when the power dissipated between these points is
equal to one watt.
voltage.
The electric potential or potential difference
expressed in volts.
122
IBM 3580 Ultrium Tape Drive Setup and Operator Guide