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protocols that provide end-to-end
connections between applications over
interconnected networks of different types.
2) A suite of transport and application
protocols that run over the Internet
Protocol. (GC) See also Internet Protocol
and Transmission Control Protocol.
transparency
See software transparency.
TSO See time sharing option.
turbo processor
A faster multiprocessor that has six
processors with common access to the
main storage.
U
UFS UNIX filing system.
Ultra-SCSI
An enhanced small computer system
interface.
unconfigure
To delete the configuration.
unit address
For zSeries, the address associated with a
device on a given control unit. On ESCON
interfaces, the unit address is the same as
the device address. On OEMI interfaces,
the unit address specifies a control unit
and device pair on the interface.
unprotected volume
An AS/400 term that indicates that the
AS/400 host recognizes the volume as an
unprotected device, even though the
storage resides on a RAID-formatted array
and is, therefore, fault tolerant by
definition. The data in an unprotected
volume can be mirrored. Also referred to
as an unprotected device.
upper-layer protocol
The layer of the Internet Protocol (IP) that
supports one or more logical protocols (for
example, a SCSI-command protocol and
an ESA/390 command protocol). Refer to
ANSI X3.230-199x.
UTC See Coordinated Universal Time.
V
virtual machine facility
A virtual data processing machine that
appears to the user to be for the exclusive
use of that user, but whose functions are
accomplished by sharing the resources of
a shared data processing system. An
alternate name for the VM/370 IBM
operating system.
vital product data (VPD)
Information that uniquely defines the
system, hardware, software, and
microcode elements of a processing
system.
VM The root name of several IBM operating
systems, such as VM/XA, VM/ESA,
VM/CMS, and z/VM. See also virtual
machine facility.
volume
For zSeries, the information recorded on a
single unit of recording medium. Indirectly,
it can refer to the unit of recording
medium itself. On a nonremovable-
medium
storage device, the term can also
indirectly refer to the storage device
associated with the volume. When multiple
volumes are stored on a single storage
medium transparently to the program, the
volumes can be referred to as logical
volumes.
volume group
A collection of either physical or logical
volumes.
volume label
A unique identifier that a user assigns to a
logical volume.
VPD See vital product data.
VSE/ESA
An IBM operating system, the letters of
which represent virtual storage
extended/enterprise systems architecture.
W
weight distribution area
The area that is required to distribute the
weight of the storage unit.
worldwide node name (WWNN)
A unique 64-bit identifier for a host that
contains a fibre-channel port. See also
worldwide port name.
worldwide port name (WWPN)
A unique 64-bit identifier associated with a
fibre-channel adapter port. It is assigned
in an implementation- and
Glossary 351