Microsoft SQL Server Virtual Backup Device Specification
Client Supported Commands
This is a list of commands that are supported by the client, depending on features selected in the configuration. An X indicates that the command must be supported by the client. An O indicates that the command is optional. VDC_Discard is optional in all configurations.
| Command (VDC_x) |
Pipe-like | Tape-like | Disk-like | Disk-like (removable) |
|---|---|---|---|---|
| VDC_Read | X | X | X | X |
| VDC_Write | X | X | X | X |
| VDC_ClearError | X | X | X | X |
| VDC_WriteMark | X | |||
| VDC_SkipMarks | X | |||
| VDC_SkipBlocks | X | |||
| VDC_Load | O | X | X | |
| VDC_Rewind | X | |||
| VDC_GetPosition | X | |||
| VDC_SetPosition | X | X | X | |
| VDC_Discard | O | O | O | O |
| VDC_Flush | X | X | X | X |
| VDC_Snapshot | O | O | O | O |
| VDC_MountSnapshot | O | O | O | O |