Fujitsu MAX3073NC - SCSI,80, Dell DC961,Hard Drive Scsi Logical Interface Specifications page 294

Glossary
Disconnect
This is processing which temporarily frees the connected state of the target with the
SCSI bus and the initiator at the point in the target's command processing execution
process when operations on the SCSI bus are not needed.
Initiator (INIT)
This is a SCSI device which initiates input and output operations on the SCSI bus. In
this manual, initiator has been abbreviated to "INIT."
Logical Unit
This is the device unit which is the object of input/output operations on the SCSI bus.
LUN
Logical Unit Number
This is the serial number which identifies a logical unit.
Message
This is control information that is delivered and received between the initiators and
targets operating on the SCSI bus for controlling a series of bus phases and
input/output operation execution sequences.
Reconnect
For a target which has executed disconnect processing, this is processing which
reconnects tot he initiator at the point when operations on the SCSI bus again become
necessary.
SCSI
Small Computer System Interface
The standardized input/output interface of the American National Standards Institute
(ANSI). [Standard No.: ANSI X3. 131-1986]
SCSI Device
The general name given to a device which is connected to the SCSI bus (input/output
device, I/O controller, host adapter, etc.).
SCSI ID
On the SCSI bus, this is the physical serial number which identifies a SCSI device.
This is a unique value for each SCSI device and the ID can be assigned from #0~#7 to
correspond to the bit number of the SCSI data bus.
GL-2 C141-C010