After setting Write Caching Policy to 3 (off), the repository fails to mount after the core service is started. Checking the stack trace you will find an error like the following:
Stack Trace:
System.AggregateException: One or more errors occurred. ---> System.AggregateException: One or more errors occurred. ---> System.AggregateException: One or more errors occurred. ---> System.AggregateException: One or more errors occurred. ---> Replay.Core.Contracts.DedupeVolumeManager.DedupeVolumeManagerException: The mount operation failed
Error mounting the volume [VolumeDescriptor{RepositoryId=1aad5e47-fdac-4c2a-a222-4dd1e7d9e979,DeviceId=1,AllocationPolicy=Striped,FileSystems='[FileSystem{RepositoryId=1aad5e47-fdac-4c2a-a222-4dd1e7d9e979,DeviceId=1,DataPath=e:\data1-REPO1,MetadataPath=e:\meta1-REPO1,WriteCachingPolicy=Off}]'}] - Error(s) 'DvmMountFailed'
AppRecovery Logs:
The Repository Bytes per sector must be equal to or greater than the Bytes Per Sector of the disk the repository resides on. By default the Repository Bytes per sector is 512. By default the majority of disk Bytes Per Sector is 512.
Starting with Rapid Recovery 6.0.1 you can modify the Repository Bytes per sector when creating a new Repository. You can verify the Bytes per sector by looking in the registry under HKEY_LOCAL_MACHINE\SOFTWARE\AppRecovery\Core\Repositories and searching for REG_DWORD BytesPerSector.
To verify the Bytes Per Sector of a disk, open an elevated CMD and run fsutil fsinfo ntfsinfo :, for example fsutil fsinfo ntfsinfo r:. You will see the following results:
Windows Registry Disclaimer:
Quest does not provide support for problems that arise from improper modification of the registry. The Windows registry contains information critical to your computer and applications. Make sure you back up the registry before modifying it. For more information on the Windows Registry Editor and how to back up and restore it, refer to Microsoft Article ID 256986 “Description of the Microsoft Windows registry” at Microsoft Support.
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