copy pair
A designated relationship between a primary volume (P-VOL) and a secondary volume (S-VOL)
in Business Continuity Manager.
copy pair matching
rate
Rate at which pair P-VOL data matches pair S-VOL data
copy pair status
The status of a P-VOL and an S-VOL copy pair, for example SIMPLEX, DUPLEX, SUSPOP, or
PENDING
copy pair structure
Combination of a P-VOL (primary device) and an S-VOL (secondary device), and their connection
configuration
D
DAD
Device address domain. Indicates sites that adopt the same device numbering system. If several
hosts on the same site have the same device numbering system, they have the same name.
Delta Resync
A method used in a 3DC Multi-Target configuration to synchronize a predefined delta resync
pair (a UR pair consisting of a local site volume and a remote site volume) by copying only the
differences between the volumes in the pair.
Delta Resync pair
A UR copy pair for performing Delta Resync. This copy pair is either in HOLD, HOLDTRNS,
HOLDER, or NODELTA status.
device address
A disk-numbering system that allows disk controllers to use volumes. These addresses are displayed
as control units and command control addresses.
device address
domain ID
(DAD ID) An identifier for a Device Address Domain in Business Continuity Manager.
DEVN
A device number used by a mainframe host to manage storage volumes
difference
management unit
A unit for managing differential data between a P-VOL and S-VOL. For TC and TCA, track or
cylinder can be specified as the difference management unit.
differential copy
A copy of a database consisting only of the differences in the database since the last full copy.
differential data
rate
Rate of the difference between the contents of a P-VOL and those of an S-VOL. A P-VOL and an
S-VOL form a copy pair
disaster recovery
testing
This function disconnects the primary site copy pair from the secondary site copy pair and tests
the secondary site to determine if the DR configuration is operating normally. When the test ends,
you must resynchronize the primary site with the secondary site.
DISPLAY command
An operator command used to display the status of BCM Monitor. You can specify this command
in the
MODIFY
command to display the current valid value of the parameter in the YKMONOPT
or YKMONCG file and the commands that are waiting to be executed.
DKC serial number
In the HP StorageWorks XP1024/XP128 Disk Array and the HP StorageWorks
XP12000/XP10000 Disk Array, a number is assigned to each storage system (physical DKC
serial number). In the HP StorageWorks XP24000/XP20000 Disk Array, a number is assigned
to each logical DKC (logical DKC serial number).
dummy device
number
A temporary device number assigned to a device detected by using the remote scan or NG scan
functionality
E
edit mode
A startup mode option for Business Continuity Manager agents. If you start a Business Continuity
Manager agent in the edit mode, you can define, operate, or monitor copy groups from XP
Replication Manager Software.
entry
A DKC or command device that the route passes through
environment
setting command
A command used for setting the environment of Business Continuity Manager, which is called by
using the
START
command of the OS. The environment setting command includes the
YKALCSVC
,
YKSETENV
, and
YKDSPENV
commands.
EXCTG
When URs are in a 4x4 configuration, consistency can be preserved between volumes on multiple
DKCs. This group, which maintains volume consistency, is called an Extended ConsisTency Group.
388 Glossary
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