PM
Preventive maintenance.
POR
Power-on reset.
port
A physical connection for communication between the 3590 and the host processor. The 3590 has
2 SCSI ports.
Portable Document Format (PDF)
A standard that is specified by Adobe Systems, Incorporated, for the electronic distribution of
documents. PDF files are compact, can be distributed globally (by way of email, 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.
Private key
A cryptographic key that is used to decrypt a message.
PROM
Programmable read only memory.
PS
Power supply.
PTF
Program temporary fix. A single bugfix or group of bugfixes that are distributed in a form ready
to install for customers.
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 that are 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, which are 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.
RFC (Request for Comments)
Request for Comments (RFC) documents are a series of memoranda, which encompasses new
research, innovations, and methodologies applicable to Internet technologies.
RH
Relative humidity.
Glossary
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