User`s guide

half-height device
A device that occupies half of a 5.25 inch SBB carrier. Two half-height devices
can be mounted in a 5.25 inch SBB carrier. The first half-height device is
normally mounted in the lower part of the carrier. The second device is normally
mounted in the upper part of the carrier.
HBVS
Host-Based Volume Shadowing. Also known as Phase 2 Volume Shadowing.
HSOF
HSOF. An abbreviation for Hierarchical Storage Operating Firmware.
HIS
Host Interconnect Services. The firmware in the HS array controller that
communicates with the host.
host
The primary or controlling computer to which a storage subsystem is attached.
HS Operating Firmware (HSOF)
Hierarchical Storage Operating Firmware or software contained on a program
card used with HS array controllers.
initiator
A SCSI device that requests an I/O process to be performed by another SCSI
device (a target). This is always the controller.
KB
The standard abbreviation for kilobyte, 1024 bytes.
KB/s
The standard abbreviation for kilobytes per second.
LED
The standard abbreviation for light emitting diode.
local terminal
A term used to describe a terminal plugged into the EIA–423 maintenance port
on the front bezel of the HS array controller. Also called a maintenance terminal.
logical unit (host logical unit)
A physical device or a storageset seen by the host. Often these logical units are
spread across more than one physical device, especially in RAID implementations.
This is not a LUN.
logical unit number
See LUN.
LRU
Least recently used. This is cache terminology for the block replacement policy
for the read cache.
Glossary–4