private device. A device that is attached directly to a server and is not connected to a fabric or switch. A private device can be part of an arbitrated loop topology or
protocol. The meanings of, and the sequencing rules for, requests and responses that are used to manage a network, transfer data, and synchronize the states of network components.
public device. A device that is attached to a fabric or switch, and can communicate to that fabric or switch. A public device can be part of an arbitrated loop topology or
Q
quiesce. To put a device into a temporarily inactive or inhibited state, but not remove it from the server.
R
read. To acquire or interpret data from a storage device, from a data medium, or from another source.
reboot. To reinitialize the execution of a program by repeating the initial program load (IPL) operation.
record. The smallest distinct set of data bytes that is supplied from a server for processing and recording by a tape drive, and the smallest distinct set of data to be read from tape, reprocessed, and made available to a server by a tape drive.
record boundaries. The fixed limits of a record.
relative humidity. The ratio of the amount of water vapor actually present in the air to the greatest amount possible at the same temperature.
repeater. A device that regenerates signals to extend the range of transmission between data stations or to interconnect two branches. A repeater is a node of a local area network.
reset. To return a device or circuit to a clear state.
LDI wrap plug. A connector mechanism that connects to an LDI port for the purpose of testing the Ultrium 2 Tape Drive’s circuitry for the LDI interface.
LDI wrap test. A diagnostic that can be run on the Ultrium 2 Tape Drive to determine whether the circuitry functions properly to and from the LDI connector.
S
s.See second.
SAN. See Storage Area Network.
SAN Data Gateway. A device that provides Fibre Channel attachment between Open Systems servers and SCSI disk and tape storage systems.
SC. See subscription channel connector.
scratch cartridge. A data cartridge that contains no useful data, but can be written to with new data.
SCSI. See Small Computer Systems Interface.
SCSI bus. (1) A collection of wires through which data is transmitted from one part of a computer to another.
(2)A generic term that refers to the complete set of signals that define the activity of the Small Computer Systems Interface (SCSI).
SCSI connector. Located at the rear of the Ultrium 2 Tape Drive, the connector that facilitates commands to and from the server, and to which the internal SCSI cable of an enclosure connects.
SCSI device. Anything that can connect into the SCSI bus and actively participate in bus activity.
SCSI drive sense data. In response to inquiry from the server about an error condition, a packet of SCSI sense bytes that contains information about the error and that is sent back to the server by the drive.
SCSI ID. The unique address (from 1 to 15) that you assign to an Ultrium 2 Tape Drive that uses a SCSI interface (Model T400).
SCSI ID connector. Located at the rear of the Ultrium 2 Tape Drive, the connector that enables the drive’s SCSI address to be set. Addresses are determined by the placement of jumpers on the pins.
SCSI interface. See Small Computer Systems Interface.
SCSI protocol. A set of rules that control the communication and transfer of data between two or more SCSI devices or systems in a communications network.
SCSI ID switch. Located on an enclosure that contains a Ultrium 2 Tape Drive, a mechanism that connects to the drive and allows you to change the drive’s SCSI ID without using jumpers.
SCSI log sense data. In response to inquiry from the server about the Ultrium 2 Tape Drive’s error logs and counters, a packet of SCSI sense bytes which contains that information and which is sent back to the server by
