Restores fail on backups of a Hyper-V guest where that guest has a disk type that is a "fixed size" VHD (virtual hard disk).

  • Article ID:100000489
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Description

This issue affects backups of a Hyper-V guest where that guest has a disk type that is a "fixed size" VHD (Virtual Hard Disk).

Backups of at Hyper-V Guest that contain a fixed length VHD volume will appear to succeed and exit with a status 0.  However, full VM (virtual machine) restores may not be possible and the job will fail during the restore.  In addition, restore attempts where "allow overwrite" is enabled in the restore dialog will result in the restore job deleting the existing VM before failing to restore it... resulting in a complete loss of the VM.

This issue affects NetBackup for Hyper-V 8.0 only.

Action Required

For NetBackup 8.0, an Emergency Engineering Binary (EEB) is available by contacting Veritas support, referencing this document and Etrack 3920957.  The EEB will allow future backups to be taken without issue; however, it will not change the outcome of attempted restores for any affected backups taken prior to installing the EEB.

Resolution:
Veritas Technologies LLC has acknowledged that the above-mentioned issue (Etrack 3920959) is present in the current versions listed under the Products section of this article.  Veritas Technologies LLC is committed to product quality and satisfied customers.

This issue is currently scheduled to be addressed in the next release of NetBackup. 

Workaround:
For affected backups, there is no way to recover the VM "whole."  Single file restores may still be possible.

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