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Methods of protecting data

Depending on your data protection and backup needs, Data ONTAP offers a variety of features and methods to ensure against accidental, malicious, or disaster-induced loss of data.

Data protection feature Description
aggr copy This is fast block copy of data stored in aggregates; it enables you to quickly copy blocks of stored system data from one aggregate to another..
Snapshot Backup within a volume.

This feature allows you to manually or automatically create, schedule, and maintain multiple backups (also called Snapshot copies) of data on a volume. Snapshot copies use only a minimal amount of additional volume space, and do not have a performance cost.

If a user accidentally modifies or deletes crucial data on a volume with Snapshot enabled, that data can be easily and quickly restored from one of the last several Snapshot copies taken.

You can also create clones of FlexVol volumes and Data ONTAP LUNs using Snapshot copies. For more details, see the Data ONTAP Storage Management Guide.

SnapRestore (license required) Fast, space-efficient restoration of large volumes of data backed up to Snapshot copies.

The SnapRestore feature performs on-request Snapshot recovery from Snapshot copies on an entire volume.

SnapMirror (license required) Volume-to-volume and qtree-to-qtree replication.

This feature enables you to periodically make Snapshot copies of data on one volume or qtree, replicate that data to a partner volume or qtree, usually on another storage system, and archive one or more iterations of that data as Snapshot copies. Replication on the partner volume or qtree ensures quick availability and restoration of data, from the point of the last Snapshot copy, should the storage system containing the original volume or qtree be disabled.

If you conduct tape backup and archival operations, you can carry them out on the data already backed to the SnapMirror partner, thus freeing the original storage system of this time-consuming, performance-degrading chore.

SnapVault (license required) Centralized backup of multiple qtrees on multiple storage systems using Snapshot technology.

This feature enables you to back up qtrees on multiple volumes and storage systems to a single SnapVault secondary storage system specialized for quick backup and restore of its sources.

You can also install the Open Systems SnapVault agent on Windows 2000, Solaris, Linux, AIX, or HP-UX systems. This agent allows SnapVault to back up and restore data to these systems also.

If you conduct tape backup and archival operations, you can carry them out on the data already backed up to the SnapVault secondary storage system, thus freeing your storage system of this time-consuming, performance degrading chore.

Tape backup dump and restore commands Tape backup and restore.

The dump and restore commands allow you to back up Snapshot copies to tape. The dump command takes a Snapshot copy of the volume and then copies that data to tape. Because the Snapshot copy, not the active file system, is backed up to tape, Data ONTAP can continue its normal functions while the tape backup takes place.

For more information, see the Data ONTAP Data Protection Tape Backup and Recovery Guide.

vol copy

Fast block-copy of data from one volume to another.

The vol copy command enables you to quickly block copy stored data from one volume to another.

SyncMirror (active/active configuration required) Continuous mirroring of data to two separate volumes.

This feature allows you to mirror data real-time to matching volumes physically connected to the same storage system head.

In case of unrecoverable disk error on one volume, the storage system automatically switches access to the mirrored volume.

This feature requires active/active configuration.

nvfail option to the vol options command Protection against data corruption by failures of nonvolatile RAM (NVRAM).
SnapValidator (license required) Detects and rejects invalid Oracle data before it is written to the storage system.
virus scan support

Support for third-party virus-scanning software for files accessed by CIFS clients.

MetroCluster Stretch MetroCluster provides site protection within a campus, and supports replication up to 500m. Fabric MetroCluster provides site protection within a metro, and supports replication up to 100 km using FC switches. SyncMirror functionality is enhanced to provide continuous volume mirroring.