Hi, Yuezhang,Mo > > >(PS: The original logic is to clear VolumeDirty after BitMap, FAT and directory > > entries are updated.) > > > > However, the writing order was not guaranteed. > > More synchronous writes are needed to guarantee the write order. > > If "dirsync" or "sync" is enabled, BitMap, FAT and directory entries are guaranteed to be written in order. > This is the reason to keep clearing VolumeDirty. SB_DIRSYNC requests synchronization of the inode of the current file/dir. The exfat implementation updates and syncs the dir-entries of the current file/dir. If only SB_DIRSYNC is set and SB_SYNC is not set, it cannot be guaranteed that FAT/mirrorFAT is synchronized. BR T .Kohada
