Dell PowerVault LTO4-120 Benutzerhandbuch - Seite 17
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N
network. A configuration of data processing devices and software that is connected for information interchange.
O
oersted. The unit of magnetic field strength in the unrationalized centimeter-gram-second (cgs) electromagnetic system. The oersted is the magnetic field
strength in the interior of an elongated, uniformly wound solenoid that is excited with a linear current density in its winding of one abamper per 4 pi
centimeters of axial length.
offline. The operating condition that the tape drive is in when the server's applications cannot interact with it.
online. The operating condition that the tape drive is in when the server's applications can interact with it.
Open Systems. Computer systems whose standards are not proprietary.
operating environment. The temperature, relative humidity rate, and wet bulb temperature of the room in which the tape drive routinely conducts processing.
P
parity. The state of being even-numbered or odd-numbered. A parity bit is a binary number that is added to a group of binary numbers to make the sum of
that group always odd (odd parity) or even (even parity).
parity error. A transmission error that occurs when the received data does not have the parity that is expected by the receiving system. This usually occurs
when the sending and receiving systems have different parity settings.
port. (1) A system or network access point for data entry or exit.
(2) A connector on a device to which cables for other devices such as display stations and printers are attached.
(3) The representation of a physical connection to hardware. A port is sometimes referred to as an adapter; however, there can be more than one port on an
adapter.
power connector. Located at the rear of the tape drive, the connector to which the internal power cable of an enclosure connects.
power cord. A cable that connects a device to a source of electrical power.
power-off. To remove electrical power from a device.
power-on, powered-on. (1) To apply electrical power to a device.
(2) The state of a device when power has been applied to it.
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.
relative humidity. The ratio of the amount of water vapor actually present in the air to the greatest amount possible at the same temperature.
reset. To return a device or circuit to a clear state.
S
scratch cartridge. A data cartridge that contains no useful data, but can be written to with new data.
SCSI. See Small Computer Systems Interface.
(2) A generic term that refers to the complete set of signals that define the activity of the Small Computer Systems Interface (SCSI).
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 log sense data. In response to inquiry from the server about the 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 the drive. Log sense data is used to diagnose problems, especially if the problems are intermittent.
second. One sixtieth of a minute.
sense data. Data that describes an I/O error. Sense data is presented to a server in response to a Sense I/O command.
server. A functional unit that provides services to one or more clients over a network. Examples include a file server, a print server, or a mail server.
Synonymous with host.