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vRanger v7.6.5.0 Machine-based VDDK SAN backup fails over to LAN back when trying to backup from VMFS6 datastores

Hi,

After moving some VMs from VMFS5 to VMFS6 datastores, the VMs can no longer be backed up over Fibre Channel and fail-over to LAN based backup. I am running the latest version vRanger v7.6.5.0 and a fully patched versions of vCenter and ESXi 6.5. I have checked the permissions in vCenter and the service account which we use for vRanger has permissions to the datastore and the physical server which is hosting vRanger can see the LUNs in Disk Manager which contain the datastores and VMs that vRanger is trying to backup. I can recreate this issue on a Windows 2012R2 server with vRanger installed and a Windows server 2016 server. I have not been able to find any documentation or forum posts which indicate that VMFS6 is not supported (As this is a technology that has been round for nearly 2 years I'd hope it is supported). I've copied a log from a VM on a VMFS6 datastore which has failed to backup over Fibre Channel.   

Can anyone shed any light on this issue?

[2018-08-12 20:00:56.856]: vRanger Backup & Replication - v7.6.5.0
[2018-08-12 20:00:56.871]: Selected Options: Compress backed up files. | Update notes with the latest backup results. | Enable Active Block MappingTm (ABM). | Enable Change Block Tracking (CBT). | Selected SpaceSavingTech: Differential.
[2018-08-12 20:00:56.871]: Task for virtual machine DR-SERVER was queued.
[2018-08-12 20:00:57.293]: SourceVm:DR-SERVER | Uuid:4226b76c-a6b9-fd7e-4303-cc4d0c014219 | VC:dr-vcenter.domain.local, Host:dr-esx02.domain.local [ESXi 6.5.0]
[2018-08-12 20:00:57.293]: Beginning backup task for DR DIFF FileServers DR-SERVER
[2018-08-12 20:00:57.293]: Starting task validation.
[2018-08-12 20:00:57.293]: Connection to dr-vcenter.domain.local was properly validated.
[2018-08-12 20:00:57.434]: dr-esx02.domain.local is properly licensed.
[2018-08-12 20:00:57.465]: Test connection to repository DR DIFF - FileServers starting...
[2018-08-12 20:00:58.481]: Test connection to repository DR DIFF - FileServers successful!
[2018-08-12 20:00:58.481]: Ending task validation... success!
[2018-08-12 20:00:58.481]: Beginning initialization of backup information.
[2018-08-12 20:00:58.903]: Retrieving the tasks parent information.
[2018-08-12 20:00:58.949]: Retrieving save points for any full backups associated with this job.
[2018-08-12 20:00:59.278]: Verifying content of repository.
[2018-08-12 20:01:11.199]: Finished initialization of backup information successfully.
[2018-08-12 20:01:11.199]: Initialization was sucessful. Backup type to run: Differential
[2018-08-12 20:01:23.296]: Retrieving the VM BIOS configuration completed.
[2018-08-12 20:06:15.523]: Removing snapshot for vRanger completed.
[2018-08-12 20:06:20.554]: Loading virtual machine 'DR-SERVER' information completed.
[2018-08-12 20:06:35.882]: Creating a snapshot for vRanger completed.
[2018-08-12 20:06:44.882]: Loading virtual machine 'DR-SERVER' information completed.
[2018-08-12 20:06:51.648]: Local machine is a physical machine.
[2018-08-12 20:06:51.648]: Backup task will attempt to use Machine-based VDDK SAN.
[2018-08-12 20:07:02.773]: Filtering out content of pagefile for disk: [VNX Pool1] DR-SERVER/DR-SERVER.vmdk
[2018-08-12 20:07:03.085]: Using filter type(s) change block and active map for disk: vix:1:r:dr-vcenter.domain.local\:443:0:[VNX Pool1] DR-SERVER/DR-SERVER.vmdk
[2018-08-12 20:07:29.773]: Using filter type(s) change block and active map for disk: vix:1:r:dr-vcenter.domain.local\:443:0:[VNX Pool1] DR-SERVER/DR-SERVER_2.vmdk
[2018-08-12 20:07:39.117]: Backing up disk 'vix:1:r:dr-vcenter.domain.local\:443:0:[VNX Pool1] DR-SERVER/DR-SERVER.vmdk:moref=vm-47:snapshot-7433:2' completed.
[2018-08-12 20:07:39.117]: Backup failed: Error: 2760 - [vix_cant_open_detail] VIX can't open [VNX Pool1] DR-SERVER/DR-SERVER.vmdk (You do not have access rights to this file) [at vddkd_open_internal:562]
[2018-08-12 20:07:39.117]: The failed backup task will be retried.
[2018-08-12 20:07:49.010]: Backing up disk 'vix:1:r:dr-vcenter.domain.local\:443:0:[VNX Pool1] DR-SERVER/DR-SERVER.vmdk:moref=vm-47:snapshot-7433:2' completed.
[2018-08-12 20:07:49.010]: Backup failed: Error: 2760 - [vix_cant_open_detail] VIX can't open [VNX Pool1] DR-SERVER/DR-SERVER.vmdk (You do not have access rights to this file) [at vddkd_open_internal:562]
[2018-08-12 20:07:49.010]: The failed backup task will be retried.
[2018-08-12 20:07:59.573]: Backing up disk 'vix:1:r:dr-vcenter.domain.local\:443:0:[VNX Pool1] DR-SERVER/DR-SERVER.vmdk:moref=vm-47:snapshot-7433:2' completed.
[2018-08-12 20:07:59.573]: Backup task using VDDK SAN failed: Error: 2760 - [vix_cant_open_detail] VIX can't open [VNX Pool1] DR-SERVER/DR-SERVER.vmdk (You do not have access rights to this file) [at vddkd_open_internal:562]
[2018-08-12 20:07:59.573]: Backup task will be attempted using a Machine-based VDDK network connection.
[2018-08-12 20:08:09.636]: Filtering out content of pagefile for disk: [VNX Pool1] DR-SERVER/DR-SERVER.vmdk
[2018-08-12 20:08:10.276]: Using filter type(s) change block and active map for disk: vix:1:r:dr-vcenter.domain.local\:443:0:[VNX Pool1] DR-SERVER/DR-SERVER.vmdk
[2018-08-12 20:08:36.933]: Using filter type(s) change block and active map for disk: vix:1:r:dr-vcenter.domain.local\:443:0:[VNX Pool1] DR-SERVER/DR-SERVER_2.vmdk
[2018-08-12 20:21:01.285]: Backing up disk 'vix:1:r:dr-vcenter.domain.local\:443:0:[VNX Pool1] DR-SERVER/DR-SERVER.vmdk:moref=vm-47:snapshot-7433:6' completed.
[2018-08-13 04:51:45.420]: Backing up disk 'vix:1:r:dr-vcenter.domain.local\:443:0:[VNX Pool1] DR-SERVER/DR-SERVER_2.vmdk:moref=vm-47:snapshot-7433:6' completed.
[2018-08-13 04:53:21.959]: Removing snapshot for vRanger completed.
[2018-08-13 04:53:22.600]: Committing savepoint data to DR DIFF - FileServers completed.
[2018-08-13 04:53:25.490]: Verifying the content of the repository completed.
[2018-08-13 04:53:29.131]: Checking and enforcing retention policy completed.
[2018-08-13 04:53:29.584]: Updating notes for DR-SERVER completed.
[2018-08-13 04:53:29.600]: Updating VM notes completed.
[2018-08-13 04:53:29.694]: Setting VM event completed.