V-79-57344-38721 - Failed to mount one or more virtual disk images:

[Stefan_Linck]

Hi,

out of a sudden I receive this exception on all hyper-v virtual machine differential backups: V-79-57344-38721 - Failed to mount one or more virtual disk images:

It is all backup to disc, all Windows Server 2008 R2, and BE 2014 SP2. Agents are up to date. Job had been running successfully for months.

This is from SGMON:

86768    BEREMOTE         2392      23.06.2015 11:05:12        10748    bevs::IVhdFileUtil::open_VHD: Failed to open file '', error: 123

86769    BEREMOTE         2392      23.06.2015 11:05:12        10748                         - bevs::IVhdFileUtil::open_VHD: Failed to open file '\\?\Volume{1eb86af7-be36-11e2-a234-14feb5cc26dd}\BEData\IMG000040\Virtual Files\D\Virtual Hard Disks\', error: 3

86770    BEREMOTE         2392      23.06.2015 11:05:12        10748    bevs::IVhdFileUtil::open_VHD: Failed to open file '\\?\Volume{1eb86af7-be36-11e2-a234-14feb5cc26dd}\BEData\IMG000040\Virtual Files\D\Virtual Hard Disks\', error: 3

86771    BEREMOTE         2392      23.06.2015 11:05:12        10748    [mounter]            - MSVSVirtualSystem::MountDisks: file "\\?\Volume{1eb86af7-be36-11e2-a234-14feb5cc26dd}\BEData\IMG000040\Virtual Files\D\Virtual Hard Disks..." Signature: 0X17EA19DD Partition Count: 0 Dynamic: False GPT-Dynamic: False Storage Pool: False

86772    BEREMOTE         2392      23.06.2015 11:05:12        10748                         - About to mount \\?\Volume{1eb86af7-be36-11e2-a234-14feb5cc26dd}\BEData\IMG000040\Virtual Files\D\Virtual Hard Disks\MAIL01-D.vhd

86773    BEREMOTE         2392      23.06.2015 11:05:12        10748    About to mount \\?\Volume{1eb86af7-be36-11e2-a234-14feb5cc26dd}\BEData\IMG000040\Virtual Files\D\Virtual Hard Disks\MAIL01-D.vhd

86774    BEREMOTE         2392      23.06.2015 11:05:12        10748                         - Failed to OpenVirtualDisk rc=1392 0x570

86775    BEREMOTE         2392      23.06.2015 11:05:12        10748    Failed to OpenVirtualDisk rc=1392 0x570

[…]

86827    BEREMOTE         2392      23.06.2015 11:05:12        10748    About to mount \\?\Volume{1eb86af7-be36-11e2-a234-14feb5cc26dd}\BEData\IMG000040\Virtual Files\D\Virtual Hard Disks\MAIL01-D.vhd

86828    BEREMOTE         2392      23.06.2015 11:05:12        10748                         - Failed to OpenVirtualDisk rc=1392 0x570

86829    BEREMOTE         2392      23.06.2015 11:05:12        10748    Failed to OpenVirtualDisk rc=1392 0x570

86830    BEREMOTE         2392      23.06.2015 11:05:12        10748    [mounter]            - MSVSVirtualSystem::MountDisk() - mount of "\\?\Volume{1eb86af7-be36-11e2-a234-14feb5cc26dd}\BEData\IMG000040\Virtual Files\D\Virtual Hard Disks..." failed with error code: 1392

Any suggestions? Thanks for any kind of help!

Stefan.

[Sush---]

Hello Stefan,

   Are there any changes done to the account used for backups? What if we run a Full backup and then again run Differential? Is that backup job successfull after another full & differential?

Regards,

Sush...

[Stefan_Linck]

Hi Sush,

Thanks for your reply. No changes had been made to the Backup Exec account. We had several circles of full backup and then differential backups. It always ended up the same way: Full backup fine, diffenentials with exceptions.

Best regards - Stefan.

[VJware]

Is this a DeDupe Folder or a Standard Disk Storage ? If the latter, does it have a drive letter and how is connected to BE ?

Per debug, it looks like it is referencing the volume GUID and not a drive letter

'\\?\Volume{1eb86af7-be36-11e2-a234-14feb5cc26dd}\

You are possibly facing this issue - https://support.symantec.com/en_US/article.TECH227776.html

[Stefan_Linck]

Hi,

it is a Standard Disk Storage. It has a drive letter. And it is connected by USB.

Best regards - Stefan.

[pkh]

Is the USB disk connected to the media server?

[Stefan_Linck]

Yes.

[Stefan_Linck]

Yes.

[VJware]

It's quite strange that the debug log is referencing the USB using its GUID and not drive letter. Would recommend to log a formal support case. Thanks.