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Glossary-11
TB
See terabyte.
TCP/IP
Transmission Control Protocol/Internet Protocol.
terabyte (TB)
A unit of measure equal to one trillion (10
12
) bytes of disk or tape storage
capacity.When referring to memory capacity, one TB equals 1,099,511,627,776 in
decimal notation or 2
40
bytes.
transmission control protocol/internet protocol (TCP/IP)
A set of communication protocols that support peer-to-peer connectivity functions for
both local and wide area networks. (IBM)
vary offline
To change the status of a device from online to offline. When a device is offline, no
data set may be opened on that device. (IBM)
vary online
To restore a device to a state where it is available for use by the system. (IBM)
virtual operator panel (VOP)
A software application that enables a user to monitor and perform some operations on
one or more tape drives remotely.
VolSafe
VolSafe (volume safe) is a special feature that provides write once, read many
(WORM) technology to VolSafe-designated tape cartridges. VolSafe permits new data
to only append the tape media, while it prevents erasure or overwrite of previously
written data.
volume serial number (VOLSER)
An alphanumeric label that the host software uses to identify a volume. It attaches to
the spine of a cartridge and is both human- and machine-readable.
VOP
See virtual operator panel.
world wide name (WWN)
A 64-bit integer that identifies a Fibre Channel port.
World Wide Node Name (WWNN)
A 64-bit network address that identifies the company (in IEEE format) with a vendor
specific identifier.
World Wide Port Name (WWPN)
A 64-bit network address that identifies the port name.
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A single pass of tape from either BOT to EOT or EOT to BOT with the heads in a fixed
transverse location.
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