

With this option, Format writes bootstrap code to the first sector of the volume (and possibly elsewhere as well). Optionally (by adding the /S, for "system" switch), format can also install a Volume Boot Record. On MS-DOS, the command is available in versions 1 and later. The command is also available in Intel ISIS-II, iRMX 86, MetaComCo TRIPOS, AmigaDOS, Zilog Z80-RIO, Microware OS-9, DR FlexOS, TSL PC-MOS, SpartaDOS X, Datalight ROM-DOS, IBM/ Toshiba 4690 OS, PTS-DOS, SISNE plus, and in the DEC RT-11 operating system. The commands can create many kinds of file systems, including those used by DOS, Windows, and OS/2. Under these systems different commands are used. This process is referred to as "creating a filesystem" in Unix, Linux, or BSD.

checking each cluster to see if it is good or bad and marking it as good or bad in the FATĪny storage device must have its medium structured to be useful.clearing the FAT root directory by changing any values found to 0x00.clearing the FAT entries by changing them to 0x00.The command performs the following actions by default on a floppy disk, hard disk drive, solid state ( USB), or other magnetic medium (it will not perform these actions on optical media): It is a component of various operating systems, including 86-DOS, MS-DOS, IBM PC DOS and OS/2, Microsoft Windows and ReactOS. In computing, format, a command-line utility that carries out disk formatting. RT-11, 86-DOS, MS-DOS, PC DOS, OS/2, eComStation, ArcaOS, ISIS-II, iRMX 86, TRIPOS, AmigaDOS, Z80-RIO, OS-9, MSX-DOS, FlexOS, PC-MOS, SpartaDOS X, DR DOS, ROM-DOS, 4690 OS, FreeDOS, PTS-DOS, SISNE plus, Windows, ReactOS
