Diskcomp

 ( External Dos Commands ) 

In computing, diskcomp is a command used for comparing the complete contents of a floppy disk to another one.

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Overview The command is used on DOS, Digital Research FlexOS, IBM/Toshiba 4690 OS,[1] SISNE plus, IBM OS/2 and Microsoft Windows. It is available in MS-DOS versions 3.2 and later and IBM PC DOS releases 1 and later.

(2026). 9780735618121, Microsoft Press. ISBN 9780735618121

Digital Research DR DOS 6.0 DR DOS 6.0 User Guide Optimisation and Configuration Tips and Datalight ROM-DOS also include an implementation of the command. The FreeDOS version was developed by Michal Meller.

The DISKCOMP.COM command does not work with hard disk drives, compact disc, , , or USB flash drives, etc. It also does not allow comparison from 3.5 inch drive to 5.25 inch drives, and vice versa. The source and target drive must be the same size.

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Examples Compare floppy disks in drive A: and drive B:

diskcomp a: b:
     

If the computer has only one floppy disk drive (in this case drive A:), it is still possible to compare two disks:

diskcomp a: a:
     

The diskcomp command will prompt to insert each disk, as needed.

The software outputs "Compare OK" if no differences are found, and "Compare error on side number, track number" upon detecting a difference.

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Further reading

• (2026). 9780789725738, Que Publishing. ISBN 9780789725738
• (1993). 9780078818714, Osborne McGraw-Hill. ISBN 9780078818714
• Æleen Frisch (2026). 9780596001483, O'Reilly. ISBN 9780596001483

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External links

• diskcomp | Microsoft Docs
• Computer Hope: MS-DOS and Windows command line diskcomp command

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