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Booting a virtual machine restored from Symantec Netbackup fails with the error: No operating system found (2021483)

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  • You are unable to boot a virtual machine restored from Symantec Netbackup.

  • When you try to power on the restored virtual machine, you see the error:

    No operating system found

  • When you attach the restored .vmdk to another Windows virtual machine and view it under Disk Management (accessed by clicking Start > Run, and typing diskmgmt.msc), the disk needs to be initialized and shows as unallocated.

  • The issue persists with a clean install of the guest OS.


This issue is caused by the way data is transferred from the storage array to the vCenter Server during restore operations using Symantec Netbackup.


To resolve this issue when performing a restore using Netbackup, choose the Transfer Type as nbd instead of san in the Recovery Options dialog box.

Note: The virtual machine restore fails because the SAN LUN is offline and the VDDK does not return the error. Therefore, selecting nbd option resolves the issue.

See Also

Update History

7/21/2014 - Added Note and link under resolution

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  • 14 Ratings