Specifications

GL–8 Compaq StorageWorks HSG80 Array Controller ACS Version 8.5 Maintenance and Service Guide
FRUTIL Field Replacement utility.
full duplex (n) A communications system in which there is a capability for 2-way
transmission and acceptance between two sites at the same time.
full duplex (adj) Pertaining to a communications method in which data can be transmitted and
received at the same time.
FWD SCSI A fast, wide, differential SCSI bus with a maximum 16-bit data transfer rate of
20 MB/s. See also SCSI and FD SCSI.
GBIC Gigabyte interface converter.
GLM Gigabit link module.
giga
A prefix indicating a billion (10
9
) units, as in gigabaud or gigabyte.
gigabaud
An encoded bit transmission rate of one billion (10
9
) bits per second.
gigabyte A value normally associated with a disk drives storage capacity, meaning a
billion (10
9
) bytes. The decimal value 1024 is usually used for one thousand.
half-duplex (adj) Pertaining to a communications system in which data can be either transmitted
or received but only in one direction at one time.
hard address The AL_PA which an NL_Port attempts to acquire during loop initialization.
HIPPI–FC Fibre Channel over HIPPI.
host The primary or controlling computer to which a storage subsystem is attached.
host adapter A device that connects a host system to a SCSI bus. The host adapter usually
performs the lowest layers of the SCSI protocol. This function may be
logically and physically integrated into the host system.
hot disks A disk containing multiple hot spots. Hot disks occur when the workload is
poorly distributed across storage devices which prevents optimum subsystem
performance.
See also hot spots.
hot spots A portion of a disk drive frequently accessed by the host. Because the data
being accessed is concentrated in one area, rather than spread across an array
of disks providing parallel access, I/O performance is significantly reduced.
See also hot disks.