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 uses
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.
Sequential Mode
Sequential Mode is intended to be used by host applications that aren’t supporting SCSI media
changer devices but need to get another cartridge loaded if the current cartridge is full.
Segment
A part.
Sel
Select.
Serial Attached SCSI (SAS)
A drive with a SAS interface can be linked directly to controllers. SAS is a performance improvement
over traditional SCSI because SAS enables multiple devices (up to 128) of different sizes and
types to be connected simultaneously with thinner and longer cables. It supports full-duplex signal
transmission up to 3 Gb/s. In addition, SAS drives can be hot-plugged.
Serialize
To change from parallel-by-byte to serial-by-bit.
Serializer
A device that converts a space distribution of simultaneous states, which represents data into a
corresponding time sequence of states.
Service
Access to this level is for Service personnel only - Service personnel have access to all menus.
Servo, servos
An adjective for use in qualifying some part or aspect of a servomechanism.
Servomechanism
A feedback control system in which at least one of the system signals represents mechanical motion.
Signature
A digital signature that is used in cryptography to identify one party to ensure authenticity.
IBM Conîš´dential
Glossary281
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