Data Replication Manager Windows-Based Server with Single Host Bus Adapter - Application Notes
Glossary
20 Application Notes – Data Replication Manager Windows-Based Server with Single Host Bus Adapter
SCSI Small Computer System Interface. A processor-independent,
standard protocol for system-level interfacing between a computer
and intelligent devices, including hard drives, floppy disks,
CD-ROMs, printers, scanners, and others.
single-mode fiber
(SMF)
Optical fiber that is designed for the transmission of a single ray or
mode of light. Used for long distance signal transmission.
SNMP trap Simple Network Management Protocol, an industry standard. The
storage system can be configured to report event information to
specified computers using SNMP.
An SNMP trap is a short message sent to SNMP-enabled hosts,
notifying them that an event has occurred on the storage system.
speed of light through
fiber
Approximately 200,000 kilometers per second or 5 microseconds to
traverse one kilometer.
subnet mask Also known as address mask. An IP network that can be reached
through a single IP address. All the members of the subnet share the
mask value. Members of the subnet can then be referenced more
easily. A subnetwork is a network that is part of another network,
connected through a gateway, bridge, or router.
SWCC An acronym for StorageWorks Command Console.
synchronous mode A mode of operation of the remote copy set where the data is written
simultaneously to the cache of the local subsystem and the cache of
the remote subsystem. The I/O completion status is not sent until all
members of the remote copy set are updated.
See also asynchronous mode.
wavelength The distance an electromagnetic wave travels in the time it takes to
oscillate through a complete cycle. Wavelengths of light are
measured in nanometers (10
-9
m) or micrometers (10
-6
m).
wavelength division
multiplexing (WDM)
A technology that uses multiple lasers and transmits several
wavelengths of light simultaneously over a single optical fiber.
zoning As applied to the Data Replication Manager: an optionally licensed
feature of Compaq SAN switches that allows a finer segmentation of
storage area networks (SANs) by allowing ports or WWN addresses
to be used to confine access to devices that are in a common zone.