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In computing, format, a command-line utility included in 86-DOS, MS-DOS, IBM PC DOS and OS/2 and Microsoft Windows operating systems, carries out disk formatting.The command is also available in the DEC RT-11 operating system. 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): # clearing the FAT entries by changing them to 0x00 # clearing the FAT root directory by changing any values found to 0x00〔〔 (NB. While the publishers claim this would be MS-DOS 1.1 and 2.0, it actually is SCP MS-DOS 1.25 and a mixture of Altos MS-DOS 2.11 and TeleVideo PC DOS 2.11.)〕〔 (NB. While the author claims this would be MS-DOS 1.1 and 2.0, it actually is SCP MS-DOS 1.25 and a mixture of Altos MS-DOS 2.11 and TeleVideo PC DOS 2.11.)〕〔 (NB. While the author claims this would be MS-DOS 1.1 and 2.0, it actually is SCP MS-DOS 1.25 and a mixture of Altos MS-DOS 2.11 and TeleVideo PC DOS 2.11.)〕 # checking each cluster to see if it is good or bad and marking it as good or bad in the FAT Optionally (by adding the /S, for "system" switch), Format can also install a Volume Boot Record. With this option, Format writes bootstrap code to the first sector of the volume (and possibly elsewhere as well). Format always writes a BIOS Parameter Block to the first sector, with or without the /S option. Another option (/Q) allows for what Microsoft calls "Quick Format". With this option the command will not perform steps 2 and 3 above. Format /Q does not alter data previously written to the media.Typing "Format" with no parameters in MS-DOS 3.2 or earlier would automatically, without prompting the user, format the current drive; however in MS-DOS 3.3 and later it would simply produce the error: "required parameter missing". Any storage device must have its medium structured to be useful. This process is referred to as "creating a filesystem" in Unix, Linux, or BSD. Under these systems the command " mkfs" exists. It creates many kinds of file systems, including those used by DOS, Windows, and OS/2.==See also== *Disk formatting *Data recovery *convert *File Allocation Table *Design of the FAT file system *fdisk *PC DOS 7.10 Format32 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Format (command)」の詳細全文を読む スポンサード リンク
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