Data Verification

Topics | How To | Troubleshooting | Related Topics

Overview

Configure a Copy for Data Verification

Pick a Job for Data Verification

Perform a Data Verification Operation

Data Verification Considerations for NetApp NAS Client

License Requirement

Audit Trail

Support Information - Storage Policy Copy

Related Reports

Overview

The software typically protects/archives data on various types of media. Once these operations have been performed, there is no way to ascertain if the data is valid for recovering until a data recovery operation has been performed on that data.

During a data verification operation, data is checked to see that it is valid for recovering and for being successfully copied during an auxiliary copy operation. You can verify data on all copies, or on a specific copy, and in parallel streams. A specific data protection/archive operation can also be verified on a copy. It is also possible to define a time interval of how long data verification for a data protection job is valid for a storage policy copy.

When auxiliary copy, data verification, and content indexing operations are initiated, they will all utilize the same single auxiliary copy manager process, thus reducing the load resources on the CommServe computer.

Configure a Copy for Data Verification

You can configure a copy for data verification so that all, full, or those data protection/archive operations occurring on or after a certain date will be verified during a data verification operation. A copy can be configured for data verification from the Advanced tab.

Note that data verification is not set by default for any agents.

Pick a Job for Data Verification

You can select individual jobs to be verified during a data verification operation from the Jobs for Copy window. You can verify jobs on all types of storage policies. The example below is for an iDataAgent Backup storage policy.

The following table describes the data verification status that is displayed in the Data Verification Status column:

Status	When Displayed
Not Picked	A job has not been picked for a data verification operation.
Picked for Verification	A job has been picked for a data verification operation.
Successful	A data verification operation ran and successfully verified this job.
Failed	A data verification operation ran and failed to verify this job.
Partial	A data verification operation ran and has not yet completed verifying this job.

Once a job is picked, its status in the Data Verification Status field is displayed as Picked for Verification.

Once a data verification operation is run, the date and time of the operation is displayed in the Date and Time of Last Verification column.

If this copy has already been configured for data verification, then individual backups do not have to be selected on the copy.

Perform a Data Verification Operation

The operation can then be performed from the Data Verification dialog box.
More advanced options are available from the Advanced Options for Data Verification dialog box, in which you can identify the media in which data should be verified.

Data Verification Considerations for NetApp NAS Client

In addition to verifying data which has been backed up using NRS, data which has been backed up to a library attached to a NetApp file server can also be verified to ensure that it is valid for recovery.

Three Windows registry keys are provided which allow you to redirect NetApp NAS NDMP data verification operations:

sSaveFileHistory: If turned on, all files in the backup will be written to the AuxCopy log as they are encountered in the backup image.
Note that this can be a large amount of data. If you choose to turn this option on, it is recommended you increase the log file size.
sVerifyHeaderOnly: If turned on, the data verification operation will not run through the entire backup image. Instead, it will only process the dump header of the backup.
sDATAVERIFICATION_DESTINATIONDIR: If turned on, data verification can be performed for Read-Only volumes when a writable location is specified on the file server. This is useful if backing up a Snap mirror destination volume to a tape drive on the file server.

For more information on these registry keys, see Registry Keys and Parameters.

Administrative Job Summary Report

The Administrative Job Summary Report displays a summary of all or select Administrative jobs.

Data Verification Job Summary Report

The Data Verification Job Summary Report displays all data verification jobs with a specified status during a specified time period.