Under the simple recovery model , file and filegroup backups are available only for read - only filegroups 在简单恢复模式下,文件和文件组备份只适用于只读文件组。
For a backup to a tape backup device , the blocksize option to affect the performance of the backup operation 在简单恢复模式下,只允许对只读文件组执行文件组备份。
This lets you do filegroup backup - and - restore operations of full - text catalogs independent of the data and log files 这样便可以独立于数据和日志文件执行文件组备份以及还原全文目录的操作。
Under the simple recovery model , file backups are essentially restricted to read - only secondary filegroups 但是,对于简单模型数据库而言,文件备份和文件组备份实质上局限于只读辅助文件组。