HP XP P9500 Reference Manual page 385

external dataset A sequential dataset for the log data output from the system logger service
external volume See the HP XP24000/XP20000 External Storage Software User's Guide.
F
failback See failover .
failover The process that occurs when one device assumes the workload of a failed companion device.
Failovers can be planned or unplanned.
FlashCopy An IBM function that copies data quickly. For details, see DFSMS Advanced Copy Services.
G
Gen'ed volume A Gen'ed volume refers to a volume that the OS recognizes. In the case of z/OS, this would be
a volume that is in the I/O gen for the LPAR.
H
host device (Host DAD ID) The device address domain ID of the host that is running Business Continuity
address domain ID Manager.
host identification A name specified to identify a mainframe when the volume information for multiple mainframe
name hosts is obtained. This name is specified by using the initialization parameter HOSTNAME of the
Business Continuity Manager agent.
HyperSwap Function for automatically switching, by using TPC-R, the I/O destination volume from the P-VOL
to the S-VOL during a failure or maintenance. This requires that both the P-VOL and S-VOL disk
controllers be connected to the same host. There are two types of HyperSwaps: Basic HyperSwaps
and GDPS (Geographically Dispersed Parallel Sysplex) HyperSwaps.
I
initialization A parameter used for setting up the environment of the Business Continuity Manager agent at
parameter the startup of the agent. The following settings are available by using this parameter: port number,
reception wait time, host identification name, prefix, DAD ID on the local site, route list ID, device
number, and log output level.
initiator port A Fibre Channel interface port on the MCU. This port is connected to the RCU by a Fibre Channel
interface (FIBRE) cable.
inter-control unit A virtual channel established between CUs where physical paths exist. Once an inter-control unit
logical path logical path is established, communication (remote copying) is enabled between the P-VOL used
by TC/TCA in the MCU and the S-VOL used by TC/TCA in the RCU.
inter-disk controller A virtual channel established between a primary DKC and a secondary DKC when at least one
logical path physical path exists between any MCU in the primary DKC and any RCU in the secondary DKC.
Once an inter-disk controller logical path is established, communication (remote copying) is
enabled between the P-VOL used by UR in the primary DKC and the S-VOL used by UR in the
RCU.
J
JES startup A cataloged procedure to start JES (Job Entry System)
procedure
journal cache A memory cache installed in the DKC used by UR. Update data to a data volume may be saved
temporarily in memory as a journal cache during journal creation processing before it serves as
a journal.
journal group A group used for UR. A unit used to preserve consistency in the update sequence when updating
volumes.
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