IBM T400F manual native sustained data transfer rate. See data

N

N/A. Not applicable.

native storage capacity. The amount of data that can be stored without compression on a tape cartridge.

native sustained data transfer rate. See data

transfer rate.

negotiated speed. Defined by Fibre Channel Standards, the algorithm that ensures the highest speed that is supported by both the Ultrium 2 Tape Drive and the port to which it attaches. This negotiation occurs at power up and whenever a catastrophic link event occurs, such as a cable pull that exceeds the timeouts that are specified in the Standards. The speed is negotiated when the first possibility of a new connection (for example, a fiber cable) is established, and is maintained until the Fibre Channel connection is terminated. The speed is not renegotiated when a new device is attached to a loop.

network. A configuration of data processing devices and software that is connected for information interchange.

network server. In a local area network, a personal computer that provides access to files for all of the workstations in the network.

node. In Fibre Channel technology, a communicating device.

N_port. Located on the Ultrium 2 Tape Drive, the Fibre Channel portal that facilitates communication only in a point-to-point topology. An N_port also allows connection to F_ports.

NL_port. Located on the Ultrium 2 Tape Drive, the Fibre Channel portal that facilitates communication only in a point-to-point topology (by acting as an N_port). If the connection fails, the port attempts to connect in an FC-AL topology (by acting as an L_port).

ntutil. Created by IBM, a utility program for LTO devices that connect to Windows NT and Windows 2000. ntutil provides problem determination for hardware or connections, assists with device and medium changer recognition, forces dumps, loads new firmware, sends and receives SCSI commands to and from the hardware, and obtains SCSI sense data to use in resolving errors.

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 4π centimeters of axial length.

offline. The operating condition that the Ultrium 2 Tape Drive is in when the server’s applications cannot interact with it.

online. The operating condition that the Ultrium 2 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 Ultrium 2 Tape Drive routinely conducts processing.

operating system. The master computer control program that translates the user’s commands and allows software application programs to interact with the computer’s hardware.

optical transceiver. A device that both transmits and receives analog or digital signals over a light source.

P

panic reset. The act of pressing and holding the unload button for 10 seconds to force a reset of a nonresponsive drive.

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.

point-to-point connection. Pertaining to data transmission between two locations without the use of any intermediate display station or computer.

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 Ultrium 2 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.

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