VDF_FileMarks (0x100)

The device uses filemarks. In this case, the softFileMarkBlockSize field of the VDConfig structure must specify the size of the soft filemark block. A size of 0 indicates that hard filemarks will be used. Otherwise, the client implements soft filemarks and Microsoft® SQL Server™ writes this size into control fields required by Microsoft Tape Format (MTF). The client must respond to VDC_WriteMarks and VDC_SkipMarks commands. The client must return ERROR_FILEMARK_DETECTED if SQL Server attempts to read through a filemark.