StorageTek Host Software Component 6.0, Руководство системного программиста

Страница: 694 / 718

1st ed., 6/30/04 - 312579601
664 VM/HSC 6.0 System Programmer’s Guide
primary CDS— The active control data set. It
contains the inventory of all cartridges in the library,
the library configuration, information about library
hardware and resource ownership across multiple
processors, and serves as a vehicle of communication
between HSCs running on multiple processors.
priority CAP (PCAP)— A one-cell CAP that is part
of an enhanced CAP. A PCAP allows a user to enter
or eject a single cartridge that requires immediate
action.
See also Cartridge Access Port, standard CAP,
enhanced CAP, WolfCreek CAP, WolfCreek optional
CAP, or TimberWolf CAP.
Program Temporary Fix (PTF)— A unit of
corrective maintenance delivered to a customer to
repair a defect in a product, or a means of packaging
a Small Programming Enhancement (SPE).
Program Update Tape (PUT)— A tape containing
a collection of PTFs. PUTs are shipped to customers
on a regular basis under the conditions of the
customer’s maintenance license.
PTF— See Program Temporary Fix.
PTP— See pass-thru port.
PUT— See Program Update Tape.
Q
QSAM— See Queued Sequential Access Method.
Queued Sequential Access Method (QSAM)— An
extended version of the basic sequential access
method (BSAM). When this method is used, a queue
is formed of input data blocks that are awaiting
processing or output data blocks that have been
processed and are awaiting transfer to auxiliary
storage or to an output device.
R
RACF— See Resource Access Control Facility.
RDC— See Remote Diagnostics Center.
Recording Density— The number of bits in a single
linear track measured per unit of length of the
recording medium.
RECtech— The parameter used to specify recording
technique.
RedWood— (1) The program name of the
StorageTek transport that supports a helical recording
technique. (2)
See SD-3.
Remote Diagnostics Center (RDC)— The Remote
Diagnostics Center at StorageTek. RDC operators
can access and test StorageTek systems and software,
through telecommunications lines, from remote
customer installations. Also referred to as the Central
Support Remote Center (CSRC).
Resource Access Control Facility (RACF)—
Security software controlling access to data sets.
S
SCP— See System Control Program.
scratch tape subpool— A defined subset of all
scratch tapes. Subpools are composed of one or more
ranges of VOLSERs with similar physical
characteristics (type of volume {reel or cartridge},
reel size, length, physical location, etc.). Some
installations may also subdivide their scratch pools
by other characteristics, such as label type (AL, SL,
NSL, NL).
The purpose of subpooling is to ensure that certain
data sets are built only within particular ranges of
volumes (for whatever reason the user desires). If a
volume which does not belong to the required
subpool is mounted for a particular data set, it is
dismounted and the mount reissued.
SD-3— The model number of the StorageTek
transport that supports a helical recording technique.
secondary CDS— The optional duplicate copy of
the primary CDS.
secondary recording— A technique for recovery
involving maintaining both a control data set and a
copy (secondary) of the control data set.
SER— Software Enhancement Request.
ServiceTek (machine initiated maintenance)— A
unique feature of the ACS in which an expert system
monitors conditions and performance of subsystems
and requests operator attention before a potential