After successfully configuring Virtual Standby exports (automatic or one-time) the initial export fails with “Unknown WMI error”. Examination of the AppRecovery.log reveals a similar error as below. The important text is highlighted in dark red.
ERROR 2014-08-22T16:28:47 [118] - Replay.Core.Implementation.Export.ExportQueueEntry ()Export task '08ac2d8c-519a-478c-9217-6a14fdf9ee49' failed
System.AggregateException: One or more errors occurred. ---> Replay.Common.Contracts.Virtualization.HyperVException: The operation with VHD virtual disk failed ---> Replay.Common.Contracts.WmiApi.WmiException: Unknown WMI error: Unknown WMI error: Method call failed with error code: 'Failed' error description: ''COMPUTERNAME' failed to add device 'Microsoft Virtual Hard Disk'. (Virtual machine ID 6B24A7B8-9884-4528-8E6E-B7874412D6F9)'COMPUTERNAME': Cannot open attachment 'I:\DomainControllers\COMPUTERNAME\disk0.vhd'. Error: 'The sector size of the physical disk on which the virtual disk resides is not supported.' (0xC03A001D). (Virtual machine ID 6B24A7B8-9884-4528-8E6E-B7874412D6F9)'SSHOU02': Cannot get information for attachment 'I:\DomainControllers\COMPUTERNAME\disk0.vhd'. (Virtual machine ID 6B24A7B8-9884-4528-8E6E-B7874412D6F9)'SSHOU02': Cannot open attachment 'I:\DomainControllers\COMPUTERNAME\disk0.vhd'. Error: 'The sector size of the physical disk on which the virtual disk resides is not supported.' (0xC03A001D). (Virtual machine ID 6B24A7B8-9884-4528-8E6E-B7874412D6F9)' --->
The above described failure occurs because the sector size of the physical disk (not virtual disk or volume) to which Virtual Standby is configured to export has an unsupported sector size. The supported sector size for Rapid Recovery Virtual Standby is 512 bytes.
WARNING: The following recommendation will destroy all the data on the disk in question. Please take proper precautions to protect that data by copying or backing up before performing this task.
To resolve this issue, the physical disk will need to be reconfigured to use 512 byte sector size.
