Digital Equipment StorageWorks UltraSCSI DS-BA370 Series, User Manual

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Glossary
Glossary–10 UltraSCSI RAID Enclosure
MB/sec
The bus width (8- or 16-bit), the number of bytes per word (1 or 2,
respectively), and the bus clock frequency determines the transfer rate in
megabytes per second (MB/sec).
megabytes per second
See MB/sec.
modular carrier
The StorageWorks compatible plastic container in which storage devices or
power supplies are mounted to form SBBs. Modular carriers are available in
both 3.5-inch and 5.25-inch form-factors.
node
A SCSI bus target or initiator that uses a SCSI bus ID. For example, disk
drives, tape drives, array controllers, and adapters all have a SCSI bus ID
and are nodes. Hubs, expanders, and converters are devices and do not have
a SCSI bus ID.
An UltraSCSI bus can have a maximum of 16 nodes (SCSI bus addresses
0 through 15).
A narrow bus can have a maximum of eight nodes, SCSI bus addresses
0 through 7.
Overtemperature
A condition where a temperature is above a specified limit and can cause
equipment failure if not corrected.
pedestal
The common name for a deskside expansion unit. Also see departmental
server cabinet.
physical bus
Two SCSI terminators separated by cables, connectors, and backplane
circuitry.
port
(1) 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 data. (2)
The hardware and software that connects a host controller to a CI, SCSI, or
SDI bus.