HP StorageWorks Data Replication Manager HSG80 ACS Version 8.7P Configuration Guide (AA-RPHZF-TE, March 2004)

Glossary
241Data Replication Manager HSG80 ACS Version 8.7P Configuration Guide
failback
The process of restoring data access to the newly restored controller in a dual-redundant controller
configuration. The failback method (full copy or fast failback) is determined by the enabling of the Logging or
Failsafe switches, the selected mode of operation (synchronous or asynchronous), and whether the failover is
planned or unplanned.
See also failover, dual-redundant configuration.
failedset
A group of disk drives that have been removed from RAIDsets due to a failure or a manual action. Disk drives in
the failedset should be considered defective and should be tested and repaired before being placed back into the
spareset or back in their original locations.
failover
The process that takes place when storage processing is moved from one pair of controllers at one site to another
pair at another site. Failover continues until the processing is failed back to the originator site.
The CLI command is: SITE_FAILOVER
See also failback, dual-redundant configuration, planned failover.
failsafe locked
The failsafe error mode can be enabled by the user to fail any write I/O whenever the target is inaccessible or the
initiator unit fails. When either of these conditions occurs, the remote copy set goes into the inoperative (offline)
state and the failsafe error mode is failsafe locked.
The CLI command SET remote-copy-set-name ERROR_MODE=FAILSAFE enables this error mode.
fast failback
A term representing the synchronization of the initiator site with the target during a planned failback from the
target back to the initiator.
The write operations are logged to the target site write history log, and during the fast failback, the initiator site
is updated from the write history log.
See also mini-merge, unplanned failover, planned failover, write history logging.
FC–AL
or
FCAL
An acronym for Fibre Channel Arbitrated Loop. FC-AL is the overall Fibre Channel topology whose basic
definition is a ring of ports where the transmit outputs of one port are attached to the receive input of the next.
Not supported by DRM.
FCC
An acronym for the Federal Communications Commission. The federal agency responsible for establishing
standards and approving electronic devices within the United States.
FCC Class A
This certification label appears on electronic devices that can only be used in a commercial environment within
the United States.
FCC Class B
This certification label appears on electronic devices that can be used in either a home or a commercial
environment within the United States.
FCP
An acronym for Fibre Channel Protocol. The mapping of SCSI-3 operations to Fibre Channel.
FDDI
An acronym for Fiber Distributed Data Interface. An ANSI standard for 100 megabaud transmission over fiber
optic cable.