Specifications

GL–10 Compaq StorageWorks HSG80 Array Controller ACS Version 8.5 Maintenance and Service Guide
JBOD Just a bunch of disks. A term used to describe a group of single-device logical
units.
kernel The most privileged processor access mode.
LBN Logical Block Number.
L_port A node or fabric port capable of performing arbitrated loop functions and
protocols. NL_Ports and FL_Ports are loop-capable ports.
LED Light Emitting Diode.
link A connection between two Fibre Channel ports consisting of a transmit fibre
and a receive fibre.
logical block
number
See LBN.
local connection A connection to the subsystem using either its serial maintenance port or the
host’s SCSI bus. A local connection enables you to connect to one subsystem
controller within the physical range of the serial or host SCSI cable.
local terminal A terminal plugged into the EIA-423 maintenance port located on the front
bezel of the controller.
See also maintenance terminal.
logical bus A single-ended bus connected to a differential bus by a SCSI bus signal
converter.
logical unit A physical or virtual device addressable through a target ID number. LUNs
use their target’s bus connection to communicate on the SCSI bus.
logical unit number A value that identifies a specific logical unit belonging to a SCSI target ID
number. A number associated with a physical device unit during a task’s I/O
operations. Each task in the system must establish its own correspondence
between logical unit numbers and physical devices.
logon Also called login. A procedure whereby a participant, either a person or
network connection, is identified as being an authorized network participant.
loop See arbitrated loop.
loop_ID A seven-bit value numbered contiguously from zero to 126-decimal and
represent the 127 legal AL_PA values on a loop (not all of the 256 hex values
are allowed as AL_PA values per FC-AL.