IBM TS4300 User Manual page 312

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.
Random Mode
In Random mode, the library allows the server's (host's) application software to select any data
cartridge in any order.
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.
REST
Representational state transfer. Part of an API. REST systems aim for fast performance, reliability, and
the ability to grow, by reusing components that can be managed and updated without affecting the
system as a whole, even while it is running.
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.
RID tag
Repair identification tag.
RML
Rack Mount Line.
Robot
Picker.
Robotic Assembly
The picker, picker assembly.
Robotics
Picker assembly.
Root CA certification
In cryptography, a root certificate from a certificate authority (CA).
RPQ
Request for price quotation.
280 IBM TS4300 Tape Library Machine Type 3555: User's Guide
IBM Confidential