Verifying a Block Backup by Using iSCSI Mapping

Catalogic DPX provides two levels of backup instance verification for the Catalogic DPX Block Data Protection.

First, backup instances are automatically verified by Catalogic DPX at the time of the backup. Random change blocks are selected during backup. “Checksums” of these selected blocks are compared against the backup instance on the storage system just before the completion of backup job. If the checksum the job fails and the failure is recorded in the log file. This process occurs completely in the background and is performed for each and every Block backup job.In the job log, it is shown as Simple.

Second, you can initiate a more thorough verification process through the management console. This verification process checks the integrity of the entire image. This is shown as Advanced.

Note. For Microsoft ReFS backups, do not use the management console verification process. Microsoft ReFS is self-healing.

The following are considerations for management console verification support:

  • Verification support is for disk containers.

  • To verify a Windows Server 2012 deduplicated NTFS volume, select a verification node running Windows Server 2012 or Windows Server 2012 R2. To verify a Windows Server 2012 R2 deduplicated NTFS volume, select a verification node running Windows Server 2012 R2. See Microsoft ReFS Support in Prerequisites for Catalogic DPX Block Backup in the User's Guide.

  • Verification for Microsoft Exchange, Microsoft SQL Server, or Oracle Databas backups is performed using a different procedure. See Verifying Application Backups in the User's Guide.

To perform a management console verification of a Block backup instance:

  1. Select the backup Snapshot to verify:

    1. On the management console, open the Block restore window.

    2. Expand the restore source tree until you identify the specific backup Snapshot to verify.

    3. Right-click on the backup Snapshot to display a context menu.

  2. Choose Verify on the context menu. A Verification job is created. You are prompted to run the Verification job.

  3. Select Run or Run and Monitor. the Catalogic DPX performs an iSCSI mapping to the storage system, then verifies the content. The results are provided in the job log. If verification fails, the reason is provided in the job log. Take appropriate corrective action. To delete a failed verification job, use Delete Restore Job on the task pane.

  4. At the conclusion of the verification process, the Catalogic DPX automatically unmaps the iSCSImapped backup Snapshot.

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