Glossary
Additional Sense Code
This is a 1-byte code displayed in the sense data and is information which
specifies the type of error that was detected.
Bus phase
The name of SCSI bus state. The SCSI bus can be either in the BUS FREE,
ARBITRATION, SELECTION, RESELECTION or INFORMATION
TRANSFER phase. The INFORMATION TRANSFER phase is divided into
subphases such as DATA IN, DATA OUT, COMMAND, STATUS,
MESSAGE IN, and MESSAGE OUT.
CDB
Command Descriptor Block
A series of data which describes commands related to input/output operations,
sent from the initiator to the target.
Command
This is a command to a target to perform an input/output operation, and it is
described as the CDB.
Disconnect
Operation performed by the target to free itself from the SCSI bus and the
initiator temporarily when SCSI bus operation becomes unnecessary during
command processing.
Initiator
This is an SCSI device which initiates input and output operations on the SCSI
bus.
Message
Information that controls a series of bus phases and I/O sequence between the
initiator and the target on the SCSI bus.
Logical unit
Simple unit of equipment that can be directed to perform one I/O operation on
the SCSI bus.
LUN
Logical unit number used to identify a logical unit.
Reconnect
Operation performed by the target to reconnect itself with the initiator when
operation on the SCSI bus becomes necessary after disconnection.
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