RAW is blank. When showing RAW, a disk must be empty and it is not ready for data storage since the most popular Windows disk file system is NTFS, FAT. When a hard disk is purchased, it is in RAW disk, while some USB drives like pen drive, usb stick, memory card are all set as FAT, probably FAT32 with its file system which are ready for data storage.
When a new hard disk drive is purchased to use on a desktop PC, it needs to be connected to the PC, and then you need to initialize it for use by going to “Disk Management” under “My Computer”, where you can reach it by right clicking “My Computer” under the desktop. And then you will be provided choices to make the new disk NTFS or FAT once you click the new disk under “Disk Managment” when creating partitions on the drive.
What happened to our storage media disk that has become RAW when we already placed many files on it? Well, by RAW disk, it means the computer can no longer recogize the hard disk. Some part of the hard disk was corrupted. But the files which were stored on the drive are still there, and you just cannot access it.
When your disk becomes RAW and you might notice by right clicking the drive that the file system is RAW and the disk size is 0 byte while there were many files there. And it reads “the disk is not formatted” when you double clicking it.
Here we found a paragraph that explains the RAW drive:A system-supplied FSD that is the ”last resort” for all I/O requests requiring file system support. When the I/O Manager calls active file systems to mount a volume, RAW is always called last because it recognizes all disk and tape media. However, RAW supplies very primitive file handling capabilities. That is, it does not impose any on-disk file structure or metadata structures for the information on the media; it simply allows read/write access to the logical blocks on the physical disk. For example, it treats the whole disk as a single file and supplies physical-disk-level VBN access to the disk.
Here are some more files about RAW disk that we Googled.