View source for XDF (Extended Density Format)

{{FormatInfo
|formattype=electronic
|subcat=Filesystem
|released=1994
}}
'''XDF''' (Extended Density Format) is a special way of formatting a PC-compatible [[floppy disk]], so that it can store more than the usual amount of data. It was developed by IBM, and used on distribution disks for some versions of OS/2 and PC-DOS.

There are several variants of XDF. The most common seems to be the 1840KB format for what would normally be a [[PC-DOS 1.44M format|1.44M 3.5" floppy disk]].

Simply reading a raw XDF [[Disk Image Formats|disk image file]] isn't necessarily problematic. Such a file should be readable by most software that supports images of [[FAT]] filesystems, or [[IMA]] format.

== See also ==
* [[DMF (Distribution Media Format)]] - a comparable format

== Sample files ==
* [https://archive.org/details/IBMOS2Warp3Collection IBM OS/2 Warp 3 Collection], e.g. Blue - 8.162 - English - Diskettes → Disk2, Disk3, ...

== Links ==
* [https://www.os2museum.com/wp/the-xdf-diskette-format/ OS/2 Museum: The XDF Diskette Format]
* [[Wikipedia: IBM Extended Density Format]]

[[Category:Floppy disk]]
[[Category:OS/2]]
[[Category:IBM]]