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GL–6
Model 2100 and 2200 Ultra SCSI Controller Enclosures User Guide
pluggable
A method of device replacement whereby the complete system remains online
during device removal or insertion. There are no data transfers over the
enclosure bus during removal or installation of an element (the bus is
"quiesced"). System booting or code loading cannot occur until insertion of
the replacement device. There is no noticeable impact on user applications
that are not dependent upon the devices on the affected SCSI bus.
See also hot-pluggable.
port
A logical route for data in and out of an array controller. A port can contain
one or more channels, all of which contain the same type of data.
power supply
A power supply that provides +5 VDC and +12 VDC to StorageWorks
enclosures. These supplies can be either AC input (120 VAC) or DC input
(48 VDC).
quiescing
To make a bus inactive, still, quiet, or dormant.
rack
Another term for cabinet. A means for storing enclosures, power system
elements, and cabling.
Radio Electronics
See RETMA.
Television
Manufacturing
Association.
RAID
Redundant array of independent disks. A set of storage techniques devised to
increase the performance and availability of a storage subsystem.
redundant array of
See RAID.
independent disks
RETMA
Radio Electronics Television Manufacturing Association. Currently known as
the EIA.
See also EIA.
SCSI
Small computer system interface. This ANSI interface defines the physical
and electrical parameters of a parallel I/O bus used to connect computers and a
maximum of seven devices.
SCSI target ID
An address given to the EMU in a shelf or enclosure that might be connected
to an SCSI-3 Enclosure Services (SES) network.
See also id.
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