Editing 8.3 filename (section)

==Compatibility==
This legacy technology is used in a wide range of products and devices, as a standard for interchanging information, such as compact flash cards used in cameras. VFAT LFN [[long filenames]] introduced by Windows 95/98/ME retained compatibility, but the VFAT LFN used on NT-based systems (Windows NT/2K/XP) uses a modified 8.3 shortname.

If a filename contains only lowercase letters, or is a combination of a lowercase ''basename'' with an uppercase ''extension'', or vice versa; and has no special characters, and fits within the 8.3 limits, a VFAT entry is not created on Windows NT and later versions such as XP. Instead, two bits in byte 0x0c of the directory entry are used to indicate that the filename should be considered as entirely or partially lowercase. Specifically, bit 4 means lowercase ''extension'' and bit 3 lowercase ''basename'', which allows for combinations such as {{code|example.TXT}} or {{code|HELLO.txt}} but not {{code|Mixed.txt}}. Few other operating systems support this. This creates a backward-compatibility [[filename mangling]] problem with older Windows versions (95, 98, ME) that see all-uppercase filenames if this extension has been used, and therefore can change the capitalization of a file when it is transported, such as on a USB flash drive. This can cause problems for operating systems that do not exhibit the case-insensitive filename behavior as DOS and Windows do. Linux will recognize this extension when reading;<ref>{{cite web |title=dir.c\fat\fs - kernel/git/torvalds/linux.git - Linux kernel source tree |website=git.kernel.org |url=https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/fs/fat/dir.c#n341 |access-date=2018-06-25}}</ref> the mount option ''shortname'' determines whether this feature is used when writing.<ref>{{cite web |title=mount(8): mount filesystem – Linux man page |url=http://www.die.net/doc/linux/man/man8/mount.8.html}}</ref>
For MS-DOS, Henrik Haftmann's DOSLFN may be used.<ref>{{cite web |title=DOSLFN |url=http://adoxa.altervista.org/doslfn/index.html}}</ref>