Exabyte VXA-2, Product Manual, Page: 83 / 90

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Initiator A SCSI device containing application clients that originate device
service requests to be processed in a device server. The host typically acts as
the initiator of commands.
LED Light Emitting Diode. The indicators on the front panel of the tape
drive.
Load The process of inserting a cartridge into the tape drive. The tape drive
automatically loads the tape into the tape path.
Low Voltage Differential (LVD) A differential SCSI interface that allows bus
lengths up to 12 meters, transfer rates up to 80 MB/sec., and allows
single-ended devices to co-exist on the bus.
msec Millisecond; one-thousandth of a second.
Mean Time Between Failures (MTBF) A quantitative measure used to specify
the reliability of a drive’s mechanics and electronics as a whole under specific
environmental conditions, cleanings, and duty cycle.
Megabyte One million bytes.
Noise Any kind of magnetic or electric interference detected by the
electronics.
OverScan Operation (OSO) The VXA technique for reading data packets
independently of track shape or geometry. By reading packets with multiple
scans, OSO ensures that each packet is read at least once.
Packet The basic VXA format structure that includes data, ECC, and address
and synchronization information.
Partition A self-contained area on a tape that can be written and read
independently to make more efficient use of the media. The VXA-2 tape drive
accommodates two partitions.
Read-After-Write (RAW) A process that improves data integrity by reading
data immediately after it is written and writing the packet again if an error is
found. Individual packets are rewritten as necessary, optimizing speed and
capacity.
SCSI Small Computer System Interface. A device interface that has been
certified as an American National Standard by ANSI. The standard contains
the electrical specifications, communication protocol, and command structure
necessary to connect various computer peripherals to a host computer.
SCSI ID A unique address assigned to each device attached to a SCSI bus. See
also Bus.
Segment The format structures contained within the data buffer. Each
segment contains 1,220 packets of data, ECC, and CRC information.