Dell PowerVault TL4000 Dell Model TL2000/TL4000 Tape Library- User's Guide - Page 272

G g. Gram. GB. gigabyte. GBIC. Gigabit Interface Converter. Gbi. gigabit gigabit (Gbit). 1 000 000 000 bits. gigabyte (GB). 1 000 000 000 bytes. Gigabit Interface Converter (GBIC). Converts copper interface to optic interface. gnd. Ground. H hertz (Hz). Unit of frequency. One hertz equals one cycle per second. hex. Hexadecimal. High Voltage Differential (HVD). A logic signaling system that enables data communication between a supported host and the library. HVD signaling uses a paired plus and minus signal level to reduce the effects of noise on the SCSI bus. Any noise injected into the signal is present in both a plus and minus state, and is thereby canceled. Synonymous with differential. HVD. SCSI Bus High Voltage Differential Hz. Hertz (cycles per second). I ID. Identifier. identifier (ID). (1) In programming languages, a lexical unit that names a language object; for example, the names of variables, arrays, records, labels, or procedures. An identifier usually consists of a letter optionally followed by letters, digits, or other characters. (2) One or more characters used to identify or name data element and possibly to indicate certain properties of that data element. (3) A sequence of bits or characters that identifies a program, device, or system to another program, device, or system. IML. Initial microprogram load. Incomp. Mag.. Incompatible Magazine: This message appears on the Operator Control Panel during library initializing. It occurs during factory restore or VPD. This is not a real issue since it takes the library a while to configure. initial microprogram load (IML). The action of loading a microprogram from an external storage to writable control storage. initiator. The component that executes a command. The initiator can be the host system or the tape control unit. INST. Installation. interface. A shared boundary. An interface might be a hardware component to link two devices or it might be a portion of storage or registers accessed by two or more computer programs. intervention required. Manual action is needed. INTRO. Introduction. I/O. Input/output. IOP. Input/output processor. IPL. Initial program load. ISV. Independent software vendor. ITST. Idle-time self-test. K kilogram (kg). One thousand grams (approximately 2.2 pounds). km. kilometer. 1000 Meters, Approximately 5/8 mile. L LAN. Local area network. A computer network within a limited area. LCD. See liquid crystal display. LED. Light-emitting diode. Linear Tape-Open (LTO). A type of tape storage technology developed by the IBM Corporation, Hewlett-Packard, and Certance. LTO technology is an "open format" technology, which means that its users will 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. The LTO technology is implemented in two formats: the Accelis format focuses on fast access; the Ultrium format focuses on high capacity. The Ultrium format is the preferred format when capacity (rather than fast access) is the key storage consideration. An Ultrium cartridge has a compressed data capacity of up to 800 GB (2:1 compression) and a native data capacity of up to 400 GB. I-4 Dell PowerVault TL2000 Tape Library and TL4000 Tape Library User's Guide