Fujitsu MAG3182FC Benutzerhandbuch
C141-E078-02EN
GL - 1
Glossary
Bus condition:
Asynchronous condition for causing SCSI bus status transition. There are
two types of bus conditions, ATTENTION and RESET.
two types of bus conditions, ATTENTION and RESET.
Bus phase:
An SCSI bus state. The SCSI bus is in one of the following phases: BUS
FREE, ARBITRATION, SELECTION, RESELECTION, or
INFORMATION TRANSFER. The INFORMATION TRANSFER phase
is divided into DATA IN, DATA OUT, COMMAND, STATUS,
MESSAGE IN, and MESSAGE OUT phases depending on the type of
information being transferred.
FREE, ARBITRATION, SELECTION, RESELECTION, or
INFORMATION TRANSFER. The INFORMATION TRANSFER phase
is divided into DATA IN, DATA OUT, COMMAND, STATUS,
MESSAGE IN, and MESSAGE OUT phases depending on the type of
information being transferred.
CCS:
Common Command Set. The standard SCSI logical specification
stipulated by a working committee of ANSI. Functions necessary for
direct access devices are defined.
stipulated by a working committee of ANSI. Functions necessary for
direct access devices are defined.
CDB:
Command Descriptor Block. A group of data that describes the command
for I/O and is transferred from an initiator to a target.
for I/O and is transferred from an initiator to a target.
Command:
Issued to a target to direct an input/output operation and written as 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 temporarily when SCSI bus operation becomes unnecessary
during command processing.
Initiator:
SCSI device that has initiated an input/output operation on the SCSI
device. This is abbreviated as INIT.
device. This is abbreviated as INIT.
Logical unit:
Simple unit of equipment that can be directed to perform one I/O
operation on the SCSI bus.
operation on the SCSI bus.
LUN:
Logical unit number used to identify a logical unit.
Message:
Information that controls a series of bus phases and I/O sequence between
the initiator and the target on the SCSI bus.
the initiator and the target on the SCSI bus.
Reconnect:
Operation performed by the target to reconnect itself with the initiator
when operation on the SCSI bus becomes necessary after disconnection.
when operation on the SCSI bus becomes necessary after disconnection.
SCSI:
Small computer system interface. An input/output interface standardized
by the American National Standards Institute (ANSI). [Standard
number: ANSI X3.131-1986]
by the American National Standards Institute (ANSI). [Standard
number: ANSI X3.131-1986]
SCSI device:
General term for a device (Input/output device, I/O controller, and host
adapter, etc.) connected to an SCSI bus.
adapter, etc.) connected to an SCSI bus.
SCSI ID:
Physical device address used to identify an SCSI device on the SCSI bus.
This number is specific to each SCSI device. SCSI IDs are #0 to #7, each
referenced by a unique bit on the data bus.
This number is specific to each SCSI device. SCSI IDs are #0 to #7, each
referenced by a unique bit on the data bus.
Sense code:
One byte of code added to the sense data to identify the type of detected
error.
error.