another. A typical switch can facilitate several simultaneous bandwidth transmissions between different pairs of nodes.
T
TapeAlert. A patented technology and ANSI standard that defines conditions and problems that are experienced by tape drives.
TapeAlert flags. Status and error messages that are generated by the TapeAlert utility and display on the server’s console.
tape cartridge. A removable storage case that houses
tape drive. See IBM TotalStorage LTO Ultrium 2 Tape Drive.
tape path. Within a tape drive, the channel in which the media moves.
tapeutil. Created by IBM, a utility program for LTO devices that connect to all supported servers except Windows NT and Windows 2000. tapeutil provides service aids for tape subsystems, offers a
terminate. To prevent unwanted electrical signal reflections by applying a device (known as a terminator) that absorbs the energy from the transmission line.
terminator. (1) A part that is used to end a SCSI bus.
(2)A
TERMPOWER. Electrical power that is provided by a device (such as the Ultrium 2 Tape Drive) to a SCSI terminator so that the SCSI bus can function. To supply TERMPOWER, a jumper must be placed on pin 1 of the SCSI ID connector on the Ultrium 2 Tape Drive.
Test Head diagnostic. A test that determines whether the heads of the Ultrium 2 Tape Drive are operating properly and whether the drive can correctly read from and write to tape.
throughput. A measure of the amount of information that is transmitted over a network in a given period of time.
topology. In communications, the physical or logical arrangement of nodes in a network, especially the relationships among nodes and the links between them.
TotalStorage LTO Ultrium 2 Tape Drive. See IBM
TotalStorage LTO Ultrium 2 Tape Drive.
track. A linear or angled pattern of data that is written on a tape surface.
transfer rate. See data transfer rate.
U
Ultra160 LVD SCSI interface. See Small Computer
Systems Interface.
Ultrium 2 Tape Drive. See IBM TotalStorage LTO
Ultrium 2 Tape Drive.
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. The act (performed by the drive) of unthreading tape from the drive’s internal tape path and returning it (with the leader block) to the tape cartridge.
unload button. Located at the front of the Ultrium 2 Tape Drive, a push button that, when depressed, rewinds the tape in a cartridge and ejects the cartridge from the drive. The unload button can also be used to place the tape drive in maintenance mode, scroll through maintenance functions, exit maintenance mode, force a drive dump, and reset the drive.
URL. See uniform resource locator.
utility. See utility program.
utility program. A computer program that supports computer processes. For example, a diagnostic program, a trace program, or a sort program.
V
Vdc. Volts dc (direct current).
