data consistency
When the data on the secondary volume is identical to the data on the primary volume.
data path
The physical paths used by primary storage systems to communicate with secondary
storage systems in a remote replication environment.
data pool
One or more logical volumes designated to temporarily store original data. When a
snapshot is taken of a primary volume, the data pool is used if a data block in the
primary volume is to be updated. The original snapshot of the volume is maintained by
storing the to-be-changed data blocks in the data pool.
DB
database
DBMS
database management system
delta resync
A disaster recovery solution in which TrueCopy and Universal Replicator systems are
configured to provide a quick recovery using only differential data stored at an
intermediate site.
device
A physical or logical unit with a specific function.
DEVN
device number
DFW
DASD fast write
DHCP
dynamic host configuration protocol
differential data
Changed data in the primary volume not yet reflected in the copy.
disaster recovery
A set of procedures to recover critical application data and processing after a disaster or
other failure.
disk array
Disk array, or just array, is another name for a RAID storage system.
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A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
Glossary-6
Hitachi TrueCopy® User Guide for Hitachi Virtual Storage Platform Gx00 and Fx00 Models
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