IBM TS2900 Manual page 127

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.
RID tag
Repair identification tag.
RML
Rack Mount Line.
robot
Picker.
robotics
Picker assembly.
root CA certification
In cryptography, a root certificate from a certificate authority (CA).
RPQ
Request for price quotation.
RSA key
Encryption key type.
R/W
read/write.
S
s
Seconds of time.
SAC
Service Action Code. Code that is developed to indicate possible FRU or FRUs to replace to repair the hardware.
SAN
Storage area network.
SAS
Serial Attached SCSI. A computer bus technology and serial communication protocol for direct attached storage devices. SAS is a replacement for parallel SCSI with
higher speeds, but still utilizing SCSI commands.
scratch cartridge
A data cartridge that contains no useful data, but can be written to with new data.
SCD
Single Character Display.
SCSI
Small computer system interface.
SE
Single-ended.
segment
122 TS2900 Tape Autoloader