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- CMScan: A Program for Sector-by-Sector Scanning of Any Floppy Disk
- by Charles F. Martin
-
- Usage:
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- CMScan first reads a disk from either floppy drive A or B, as chosen
- by the user, and makes an image of it on hard drive C. It then
- displays the first three sectors on the screen (track 0, head 0,
- sectors 1-3), and waits for you to page through the disk up or down
- to the next three contiguous sectors (PgUp or PgDn), to the
- next track (Ctrl-PgUp or Ctrl-PgDn), or exit (Esc).
-
- CMScan is useful for examining the contents of a disk for text that
- remains on the sectors after a file deletion by DOS (since DOS only
- resets the first character of the file name and resets the File
- Allocation Table entries for the clusters previously used by that
- file, but does not erase the data itself). Security officers might
- find CMScan useful for confirming the absence of sensitive or
- classified plain-text information on a disk, including data
- inadvertently carried from the DOS I/O buffers into the slack space
- of the last sector of a file.
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- Running:
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- At the DOS system prompt, just type CMSCAN. You will be shown an
- opening screen that may be cleared with a single keystroke. CMScan
- then asks you to press the letter, A or B, corresponding to the
- drive you want to scan a disk from, to insert the disk to be scanned
- into the drive, and press Enter. CMScan will then read the disk,
- first determining and informing you what disk format it is, and
- display the first three sectors.
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- Press PgUp to go back to the previous three sectors, PgDn to go
- forward to the next three; Ctrl-PgUp to go back by one track,
- keeping the same sector and head, Ctrl-PgDn to go forward by one
- track.
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- Press Esc to exit. CMScan will ask you if you want to scan
- another disk.
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- Registration:
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- CMScan is distributed as Shareware. It is not "freeware" or
- public domain software, but is made available to you, the user, for
- evaluation under the Shareware principle of "try before buy".
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- If you use CMScan regularly, you are requested to register your
- copy. Registration fee is $5.00, and may be remitted to:
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- Charles F. Martin
- NoVaSoft
- 3239 Riverview Dr.
- Triangle, VA 22172-1421 USA
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- CMScan may be registered with the related utilities CMCopy and
- CMFormat as a package for $8.00.
-
- Author may be contacted by telephone at (703) 221-1833 or 221-1471,
- or by CompuServe E-mail [72130,1400].
-
- Charles F. Martin is a member of the Association of Shareware
- Professionals (ASP). ASP wants to make sure that the shareware
- principle works for you. If you are unable to resolve a shareware-
- related problem with an ASP member by contacting the member
- directly, ASP may be able to help. The ASP Ombudsman can help you
- resolve a dispute or problem with an ASP member, but does not
- provide technical support for members' products. Please write to the
- ASP Ombudsman at 545 Grover Road, Muskegon, MI 49442 or send a
- CompuServe message via CompuServe Mail to ASP Ombudsman 70007,3536.
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