IBM H4S, Setup, Operator, And Service Manual

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POR Power-on reset.
port A physical connection for communication between the 3590 and the host
processor. The 3590 has two SCSI ports.
Portable Document Format (PDF)
A standard specified by Adobe Systems, Incorporated, for the electronic
distribution of documents. PDF files are compact, can be distributed globally
(via e-mail, the Web, intranets, or CD-ROM), and can be viewed with the
Acrobat Reader, which is software from Adobe Systems that can be
downloaded at no cost from the Adobe Systems home page.
PROM Programmable read only memory.
PS Power supply.
PWR Power.
R
rack A unit that houses the components of a storage subsystem, such as the
library.
rackmount kit
A packaged collection of articles used to install the rack mounted version of
the library.
RAM Random access memory.
Random access memory
A storage device into which data is entered and from which data is retrieved
in a nonsequential manner.
RAS Reliability, availability, and serviceability.
record
A collection of related data or words, treated as a unit.
recording density
The number of bits in a single linear track measured per unit of length of
the recording medium.
recoverable error
An error condition that allows continued execution of a program.
ref Reference.
reg Register.
reinventory
To inventory again.
retension
The process or function of tightening the tape onto the cartridge, if it is
sensed that the tape has a loose wrap on the cartridge.
robot Picker.
robotics
Picker assembly.
RPQ Request for price quotation.
R/W Read/write.
Glossary
G-11