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In computing, format is a command-line utility that carries out disk formatting. It is a component of various operating systems , including 86-DOS , MS-DOS , IBM PC DOS and OS/2 , Microsoft Windows and ReactOS .
On Windows XP or later, the maximum length of the string that can be used at the command prompt is 8191 (2 13-1) characters. On earlier versions, such as Windows 2000 or Windows NT 4.0 , the maximum length of the string is 2047 (2 11 -1) characters.
B: — Reserved for a second floppy drive (that was present on many PCs). C: — First hard disk drive partition. D: to Z: — Other disk partitions get labeled here. Windows assigns the next free drive letter to the next drive it encounters while enumerating the disk drives on the system. Drives can be partitioned, thereby creating more drive ...
For example, in DOS 5, if the current directory is C:\TEMP, then TRUENAME command.com will display C:\TEMP\COMMAND.COM (which does not exist), not C:\DOS\COMMAND.COM (which does and is in the PATH). This command displays the UNC pathnames of mapped network or local CD drives. This command is an undocumented DOS command.
The Windows 7 diskpart command The ReactOS diskpart command. In computing, diskpart is a command-line disk partitioning utility included in Windows 2000 and later Microsoft operating systems, replacing its predecessor, fdisk. [1] [2] The command is also available in ReactOS. [3]
A block, a contiguous number of bytes, is the minimum unit of storage that is read from and written to a disk by a disk driver.The earliest disk drives had fixed block sizes (e.g. the IBM 350 disk storage unit (of the late 1950s) block size was 100 six-bit characters) but starting with the 1301 [8] IBM marketed subsystems that featured variable block sizes: a particular track could have blocks ...
Microsoft advertised DoubleSpace on the cover of MS-DOS 6 distributions (user's guide for MS-DOS 6 with Windows 3.1 pack-in pictured, DoubleSpace sticker top-right). In the most common usage scenario, the user would have one hard drive in the computer, with all the space allocated to one partition (usually as drive C:).
The chkdsk command on Windows XP. CHKDSK can be run from DOS prompt, Windows Explorer, Windows Command Prompt, Windows PowerShell or Recovery Console. [10] On Windows NT operating systems, CHKDSK can also check the disk surface for bad sectors and mark them (in MS-DOS 6.x and Windows 9x, this is a task done by Microsoft ScanDisk).