Glossary

copying processes normally continue after creation.

See also snapshot.

source (R1) device (EMC Symmetrix

specific term)

An EMC Symmetrix device that participates in SRDF operations with a target (R2) device. All writes to this device are mirrored to a target (R2) device in a remote EMC Symmetrix unit. An R1 device must be assigned to an RDF1 group type.

See also target (R2) device.

source volume (ZDB specific term)

A storage volume containing data to be replicated.

sparse file A file that contains data with portions of empty blocks. Examples are: -A matrix in which some or much of the data contains zeros -files from image applications -high-speed databases If sparse file processing is not enabled during restore, it might be impossible to restore this file.

split mirror (EMC Symmetrix and HP StorageWorks Disk Array XP specific term)

A replica created using split mirror techniques. Such a replica provides an independent, exact duplicate, or clone, of the contents of the source volumes. See also replica and split mirror

creation.
split mirror backup (EMC Symmetrix

specific term)

See ZDB to tape.split mirror backup (HP StorageWorks Disk Array XP specific term)

See ZDB to tape, ZDB to disk, and ZDB to disk+tape.

split mirror creation (EMC Symmetrix and HP StorageWorks Disk Array XP specific term)

A replica creation technique, in which a pre-configured set of target volumes (a mirror) is kept synchronized with a set of source volumes until the time at which a replica of the contents of the source volumes is required. Then, the synchronization is stopped (the mirror is split) and a split mirror replica of the source volumes at the time of the split remains in the target volumes.

See also split mirror.

split mirror restore (EMC Symmetrix and HP StorageWorks Disk Array XP specific term)

A process in which data backed up in a ZDB-to-tape or a ZDB-to-disk+tape session is restored from tape media to a split mirror replica, which is then synchronized to the source volumes. Individual backup objects or complete sessions can be restored using this method.

See also ZDB to tape, ZDB to disk+tape, and replica.
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