HP Lefthand VSS Provider Import Snapshot Error

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Re: HP Lefthand VSS Provider Import Snapshot Error

Veeam Logoby JaYaKaAzZ » Wed May 20, 2015 6:27 am

Didnt test that Frank... but its a good question
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Re: HP Lefthand VSS Provider Import Snapshot Error

Veeam Logoby lowlander » Fri Jun 05, 2015 6:39 pm

JaYaKaAzZ wrote:So here is the final Update to my Call...

U have to add the Proxy Server to the Cluster Group and than the Direct SAN Backup will work fine with the Lefthand Hardware Provider. I know sounds very strange but its the solution !


Thanks for this solution. It indeed works. We added the off host proxy to the cluster group and the backup is working again.

However, all CSV volumes are presented read/write to the off host proxy.

We followed the following advises:
- san policy=OfflineAll
- automount disable
- automount scrub

This is working perfectly and settings remain after a reboot. However when we start a backup that is using the off host proxy, the automount setting is being enabled again. When rebooting the off host proxy this is quite undiserable regarding the CSV volumes being in read write mode.

I opened a support case 00935459

Anyone experienced similar behaviour ? Offhost proxy is Windows 2008 R2
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Re: HP Lefthand VSS Provider Import Snapshot Error

Veeam Logoby lowlander » Mon Jun 08, 2015 1:32 pm

I monitored the backup processes and apparently the process VeeamHvIntegrationSvc.exe initiates registry set command on the key NoAutoMount=0. As a workaround we wrote a post backup script to set this value to 1 after a backup. Also created a computer policy startup / shutdown to disable automount.

We wait now on support regarding the official statement regarding this issue. Above is a workaround for now.
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Re: HP Lefthand VSS Provider Import Snapshot Error

Veeam Logoby Vitaliy S. » Thu Jun 11, 2015 4:46 pm

I have discussed this behavior with our R&D team and automount is, indeed, set to enabled mode on the Hyper-V off-host proxy server. This is required by backup job VSS process, however if san policy is configured as OfflineAll, then CSV should not be mounted with a drive letter. Let's see what our support engineer can find out after looking through the logs.
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Re: HP Lefthand VSS Provider Import Snapshot Error

Veeam Logoby Vitaliy S. » Tue Jun 16, 2015 1:30 pm

@lowlander, do you see the same behavior on any other off-host proxy server?
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Re: HP Lefthand VSS Provider Import Snapshot Error

Veeam Logoby lowlander » Tue Jun 16, 2015 10:17 pm

Hi,

we only have one off-host proxy. We looked into the SAN policy in combination with the iSCSI volumes. When enabling SAN policy "offline all", the iSCSI volumes are booted in an online state. When enabling SAN policy "offline shared" iSCSI volumes are listed in disk manager as offline (as expected). I will try to simulate this behaviour in our lab, when time is available :)

* SAN policy we configure in diskpart
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Re: HP Lefthand VSS Provider Import Snapshot Error

Veeam Logoby Vitaliy S. » Wed Jun 17, 2015 10:12 am

Hmm... that's weird, cause offline all should also keep new volumes from initialization. I bet you will not see this behavior on another Windows box.
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Re: HP Lefthand VSS Provider Import Snapshot Error

Veeam Logoby lowlander » Mon Jun 22, 2015 12:24 pm

Quick update. When Veeam is backing up a Hyper-V VM the snapshot volume is mounted with a drive letter. When backup finishes, the disk is removed from diskmgmt.msc. So basically even when SAN policy is set to "offline shared" mode the disk is configured as online disk (with a drive letter). Disk is listed as RAW volume.
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Re: HP Lefthand VSS Provider Import Snapshot Error

Veeam Logoby Vitaliy S. » Tue Jun 23, 2015 10:54 am

Under normal conditions drive letter assignment should not be happening, so I wonder whether these volumes have been initialized previously or not, cause SAN policy should definitely help here.
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Re: HP Lefthand VSS Provider Import Snapshot Error

Veeam Logoby lowlander » Wed Jun 24, 2015 9:51 pm 1 person likes this post

Hi,

I captured this in a mp4 and updated it with case 00949962
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