IBM 3580-L11 Setup Guide - Page 108

status light. Located on the front of the 3580 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 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 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 Ultra SCSI. See Small Computer Systems Interface (SCSI). Ultra-2 SCSI. See Small Computer Systems Interface (SCSI). Ultrium Tape Drive. See IBM Ultrium 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 92 IBM 3580 Tape Drive Setup, Operator, and Service Guide 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 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. W W. Watts. watt. A metric unit of measure of power; the power required to keep a current of one ampere flowing under a potential drop of one volt; about 1/736 of one horsepower. Web. See World Wide Web. wet bulb temperature. The temperature at which pure water must be evaporated adiabatically at constant pressure into a given sample of air in order to saturate the air under steady-state conditions. Read from a wet-bulb thermometer. World Wide Web. A network of servers that contain programs and files. Many of the files contain hypertext links to other documents available through the network. write. To make a permanent or transient recording of data in a storage device or on a data medium.