T
tachometer, tach
A device that emits pulses that are used to measure/check speed or distance.
tape cartridge
A container that holds magnetic tape, that can be processed without separating it from the
container.
tape void
An area in the tape in which no signal can be detected.
TB Terabyte.
TCP/IP
Transmission Control Protocol/Internet Protocol.
TCU Tape control unit.
Terabyte
One terabyte = 1,000,000,000,000 bytes, or 1000 gigabytes (GBs).
TH Thermal.
TKLM (IBM Tivoli Key Lifecycle Manager)
IBM's EKM application that assists encrypting tape drives in generating, protecting, storing, and
maintaining encryption keys that encrypt information that is written to and decrypt information
that is read from tape media.
thread/load operation
A procedure that places tape along the tape path.
TM Tapemark.
transport mode
End-to-end communications security in which the end-point computers do the security
processing.
trusted certification
In cryptography, a trustworthy certificate that is not registered with a certificate authority.
tunnel mode
Port-to-port communications security in which security is provided to several machines by a
single node.
U
UART Universal asynchronous receiver/transmitter.
UL Underwriter's Laboratories.
unload
Prepare the tape cartridge for removal from the drive.
utilities
Utility programs.
utility programs
A computer program in general support of the processes of a computer; for instance, a diagnostic
program.
uv Under voltage.
Glossary 349
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