The RAW file system is a state of a storage device that has an unknown or no file system in Windows.
Repairing a filesystem may be a risky business as sometimes the problem is “fixed” by removing all invalid files. So if you have access to some of your files but not all, it’s recommended to backup what it’s possible to access before trying to repair the filesystem.
Windows can read and write files from FAT, exFAT and NTFS filesystem. The chkdsk command is used to check and repair filesystems. Run cmd (Right-click Run As Administrator)
ntfsfix can be used to repair NTFS filesystem followed by Windows chkdsk . Note that it resets the NTFS journal file, so it should be used only if Windows failed to repair the filesystem.
Try TestDisk command-line utility to repair the file system of a raw storage drive.
TestDisk Download - CGSecurity
• start TestDisk
• select the device containing the partition (avoid drive letter like D:)
The boot sector of the logical NTFS partition is damaged. (Windows error message is usually The type of the file system is RAW. or The disk in drive D is not formatted. Do you want to format it now?)
The backup boot sector is valid, choose
Backup BS to copy backup boot sector over boot sector. If Backup BS isn't available, choose
RebuildBS.
• confirm
• Quit