 For some time, Linux also provided combined support for UMSDOS-style permissions and VFAT long filenames through UVFAT.In 2007 the open FAT+ draft proposed how to store larger files up to 256 GiB minus 1 byte or 274,877,906,943 (238 − 1) bytes on slightly modified and otherwise backward-compatible FAT32 volumes, but imposes a risk that disk tools or FAT32 implementations not aware of this extension may truncate or delete files exceeding the normal FAT32 file size limit.Support for FAT32+ and FAT16+ is limited to some versions of DR-DOS and not available in mainstream operating systems.