Set the appropriate parameters to set backup devices.
Windows does not specify rewind or no rewind devices and supports only fixed-length I/O operations to tape devices. SAP Sybase IQ requires variable-length devices and must perform additional processing to accommodate fixed-length tape I/O.
Because SAP Sybase IQ does not support Windows tape partitioning, do not use another application to format tapes for Sybase IQ backup or restore. Windows uses a simpler naming strategy for its tape devices.
The value for block_size is 0. This tape drive is in variable-length block mode. A non-zero value indicates fixed length block mode, which IQ backup does not support.
Administration: Backup, Restore, and Data Recovery