In the case of an HDM image, you can prepend a 4096-byte header onto the image to turn it into an FDI (see example below).įor a 1261568-byte '2HD' disk image (like *. The remaining portion of the file is a raw dd-style image of the disk.

The next 4,064 bytes of the header seem to always be pad bytes. Due to their obscurity, they're best avoided if possible.The FDI header is 4096 bytes long, Intel little-endian, and starts with this 32-byte header. Quick Disks were a far less common format, used in a few samplers and MIDI sequencers (along with home computers, consoles, and word processors). They have a small square right-protect tab in the lower left corner, and a permanent small square hole in lower right corner. They can hold up to about 2 MB of data pre-formatting. MF-2HD floppy disks are micro floppy, double sided, high density. They have a small square right-protect tab in the lower left corner (filled to allow writing, or showing a gap to protect against it), while the lower right corner is plain. They can hold up to about 1 MB of data, some of which gets lost to the entropy of the filesystem. MF-2DD floppy disks are micro floppy, double sided, double density. 3.5' floppy disks also come in a few varieties: The thin sliver of disk at the bottom is protected by a sliding piece of metal. 3.5'ģ.5' floppy disks are encased in a (usually blue) hard protective caddy, but the disks themselves are still floppy. SS DD floppy disks are single sided, double density.ĭS DD floppy disks are double sided, double density.ĭS HD floppy disks are double sided, high density.Īlthough the disks were sometimes double sided, the drives usually weren't, requiring you to eject and flip around the disk, much like a vinyl record or cassette tape. SS SD floppy disks are single sided, single density. 5.25' floppy disks come in a few varieties: On PCs with the advent of the AT design, IBM introduced the DSHD (High Density) design of 5¼' floppy, 1.2MB capacity. The case exposes a thin sliver of the disk at the bottom.

Most laptops dont even have these drives install. 5.25' floppy disks are encased in a (usually black) soft protective case. Learn what happens when you format a floppy disk Floppy drives are rapidly going the way of the dinosaurs.

How to format 2hd floppy disk to 2dd