Dell PowerVault LTO4-120 User Manual - Page 16

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Head Resistance Measurements test. Part of the Test Head diagnostic, a procedure that determines whether the tape drive's head works correctly. The test

measures the head's ability to withstand cracks and other defects.

host. The controlling or highest-level system in a data communication configuration. Synonymous with server.

ID. Identifier.

in. See inch.

inch. A unit of length equal to 1/36 yard or 25.4 mm.

input/output (I/O). Data that is provided to a computer or data that results from computer processing.

insertion guide. On the surface of the tape cartridge, a large, notched area that prevents you from inserting the cartridge incorrectly.

install. (1) To set up for use or service. (2) The act of adding a product, feature, or function to a server or device either by a singular change or by the addition

of multiple components or devices.

interposer. An adapter-like device that allows a connector of one size and style to connect to a mating connector of a different size and style. Data provided

to the computer or data resulting from computer processing.

I/O. See input/output.

jumper. (1) A tiny connector that fits over a pair of protruding pins in a connector. A jumper can be moved to change electrical connectors. When in place, the

jumper connects the pins electrically.

(2) To place a jumper on a connector pin.

label. A slip of paper with an adhesive backing that can be written on and affixed to a tape cartridge as a means of identification or description.

label area. On the LTO Ultrium Tape Cartridge, a recessed area next to the write-protect switch where a bar code label must be affixed.

leader block. Located within the tape drive, the part that engages the steel pin which is attached to the tape in an LTO Ultrium Tape Cartridge. Once

engaged, the leader-pin block pulls the tape from the cartridge into the drive.

leader pin. On the tape cartridge, a small metal column that is attached to the end of the magnetic tape. During tape processing the leader pin is grasped by

a threading mechanism, which pulls the pin and the tape out of the cartridge, across the drive head, and onto a takeup reel. The head can then read or write

data from or to the tape.

LED. See light-emitting diode.

light-emitting diode. A semiconductor diode that emits light when subjected to an applied voltage and that is used in an electronic display.

Linear Tape-Open (LTO). A type of tape storage technology developed by the IBM Corporation, Hewlett-Packard, and Seagate. LTO technology is an "open

format" technology, which means that its users have multiple sources of product and media. The "open" nature of LTO technology enables compatibility

between different vendors' offerings by ensuring that vendors comply with verification standards.

load. Following the insertion of a tape cartridge into the tape load compartment, the act of positioning the tape (performed by the tape drive) for reading or

writing by the drive's head.

log sense data. See SCSI log sense data.

loop. (1) A series of instructions that is repeated until a terminating condition is reached.

(2) To connect so as to complete a loop.

LTO. See Linear Tape-Open.

magnetic tape. A tape with a magnetizable surface layer on which data can be stored by magnetic recording.

maintenance mode. The state of operation in which the tape drive must be before it can run diagnostics, verify write and read operations, verify a suspect

tape cartridge, update its own firmware, and perform other diagnostic and maintenance functions.

MB. See megabyte.

media. The plural of medium.

medium. A physical material in or on which data may be represented, such as magnetic tape.

megabyte (MB). 1,000,000 bytes.