thread/load operation
A procedure that places tape along the tape path.
TLS
Transport :Layer Security.
TM
Tapemark, Trademark.
Transport mode
End-to-end communications security in which the end-point computers do the security processing.
Trusted certiîš´cation
In cryptography, a trustworthy certiîš´cate that is not registered with a certiîš´cate 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.
UID
Unit Identiîš´cation.
UL
Underwriter's Laboratories.
Universal rack connector
A rackmount kit has four universal rack connectors as part of the kit. Each connector has two sides
- one side is for round-hole racks, and the other side is for square-hole racks. The square-hole side
might be painted. The connectors are installed from the inside of the rack out, and the rails are
hooked onto them. See Figure 36 on page 57.
Unload
Prepare the tape cartridge for removal from the drive.
User
The User role is an interchangeable term corresponding to the Monitor role. The User role has viewing
privileges to the unit, but is not able to make conîš´guration changes.
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.
V
VOLSER
Volume serial number.
Volume
A certain portion of data, together with its data carrier, that can be handled conveniently as a unit.
VPD
Vital product data. The information that is contained within the tape drive that requires nonvolatile
storage that is used by functional areas of the drive, and information that is required for
manufacturing, RAS, and engineering.
IBM Conîš´dential
284IBM TS4300 Tape Library Machine Type 3555: User's Guide
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