                            Nimbus Information Systems
                    CD-Rom Inspection Tools, Block Access Test     
                                By Ernest L. Runyon

The following test is to allow your system to test an incoming CD-Rom
to assure that every block and sector is accessible.  It uses the
standard MS-DOS copy utility to do this, but will copy the entire disc
to a nul device. If the disk copies without error, then every block
was opened and is accessible.
Proceed as follows:

1. Place the ROM to be inspected in your CD-Rom drive.

2. Determine which drive is your CD-Rom drive. Do this by giving the
   command "DIR" to successively higher drives than "C:" drives until
   the busy light in the ROM drive flashes, and a directory of the ROM
   appears.

3. Note the file structure..

A. "STUFF.GRT" indicates a single file.

B. "STUFF <DIR>" indicates a directory.

C. "STUFF.GRT
    STUFF.BAD
    STUFF.IND
    STUFF.XXX
    STUFF.XYZ" 
indicates a list of files.

D. "STUFF <DIR>
STUFF.GRT
STUFF.ZZZ
MORESTUFF.AAA" indicates mixes of directories and files
The test utility for conditions A-D above is as follows:( Assuming
that "D:" is the found CD-Rom drive)

A.      COPY D:\*.* /B NUL

Will copy the single file "STUFF.GRT to the nul device.

B. COPY D:\STUFF\*.* /B NUL

Will copy the entire contents of the directory STUFF <DIR> to a nul
device.  Directories should be searched for sub-directories and if
they must be added to the path.


C. COPY D:\*.* /B NUL

Will copy all of the files in the root directory to a nul device

D. COPY D:\STUFF\*.* /B NUL

Will copy the directory "STUFF" to a nul device. When finished, the
next command will finish off the remaining files.

 COPY D:\*.* /B NUL

It will be helpful to print out a Tree of the directory structure to
help determine where the sub-directories lay.

Call the Nimbus Hotline (800) 782-0778 or (804) 985-1100 for more info.
