ESD. Electrostatic discharge.ESP. The Encapsulating Security Payload (ESP)protocol provides origin authenticity, integrity, andconfidentiality protection of a packet. ESP also supportsencryption-only and authentication-only configurations,but using encryption without authentication is stronglydiscouraged because it is insecure.Ffault symptom code (FSC). A hexadecimal codegenerated by the drive or the control unit microcode inresponse to a detected subsystem error.FCC. Federal communications commission.fiducial. A target used for teaching a physical locationto a robot.field replaceable unit (FRU). An assembly that isreplaced in its entirety when any one of its componentsfails.file. A named set of records stored or processed as aunit. Also referred to as a dataset.file protection. The processes and proceduresestablished in an information system that are designedto inhibit unauthorized access to, contamination of, ordeletion of a file.file transfer protocol (FTP). In the Internet suite ofprotocols, an application layer protocol that uses TCPand Telnet services to transfer bulk-data files betweenmachines or hosts.firmware. Proprietary code that is usually delivered asmicrocode as part of an operating system. Firmware ismore efficient than software loaded from an alterablemedium and more adaptable to change than purehardware circuitry. An example of firmware is the BasicInput/Output System (BIOS) in read-only memory(ROM) on a PC motherboard.FLASH EEPROM. An electrically erasableprogrammable read-only memory (EEPROM) that canbe updated.FMR. Field microcode replacement.format. The arrangement or layout of data on a datamedium.formatter. Part of a magnetic tape subsystem thatperforms data conversion, speed matching, encoding,first level error recovery, and interfaces to one or moretape drives.FP. File protect.frayed. Damaged as if by an abrasive substance.FRU. Field replaceable unit.FSC. Fault symptom code.FSI. Fault symptom index.functional microcode. Microcode that is resident inthe machine during normal customer operation.Gg. Gram.GB. gigabyte.GBIC. Gigabit Interface Converter.Gbi. gigabitgigabit (Gbit). 1 000 000 000 bits.gigabyte (GB). 1 000 000 000 bytes.Gigabit Interface Converter (GBIC). Converts copperinterface to optic interface.gnd. Ground.Hhertz (Hz). Unit of frequency. One hertz equals onecycle per second.hex. Hexadecimal.High Voltage Differential (HVD). A logic signalingsystem that enables data communication between asupported host and the library. HVD signaling uses apaired plus and minus signal level to reduce the effectsof noise on the SCSI bus. Any noise injected into thesignal is present in both a plus and minus state, and isthereby canceled. Synonymous with differential.HVD. SCSI Bus High Voltage DifferentialHz. Hertz (cycles per second).IID. Identifier.identifier (ID). (1) In programming languages, alexical unit that names a language object; for example,the names of variables, arrays, records, labels, orprocedures. An identifier usually consists of a letteroptionally followed by letters, digits, or othercharacters. (2) One or more characters used to identifyor name data element and possibly to indicate certainproperties of that data element. (3) A sequence of bitsor characters that identifies a program, device, orsystem to another program, device, or system.H-4 Dell PowerVault TL2000 Tape Library and TL4000 Tape Library User's Guide
