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Light ROM 1
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LIGHT-ROM 1 (Amiga Library Services)(1994).iso
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problems.txt
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1994-10-19
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5KB
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102 lines
REPORTING PROBLEMS
(Updated 10/20/94)
If you experience any problems reading files off this CD-ROM, please read
this entire file and try all the suggested tests before contacting Amiga
Library Services for help. We will be happy to try to resolve such problems
once you have tried the suggested tests and gathered as much information as
possible about your problem.
======================
CD-ROM DRIVER SOFTWARE
======================
Since beginning CD-ROM distributions, we have tested many different CD-ROM
driver packages for the Amiga (but not all of them), and found problems with
many of them. The distributers of the software have been very responsive
about fixing any bugs found, so current versions of CD-ROM drivers from
third party vendors should work fine. We strongly suggest that you stay
current with the latest version of whatever drivers you are using.
To see if your driver is capable of correctly reading every file on this
CD-ROM, locate a copy of the commonly available "brik" program, go to the
root directory of the CD-ROM, and run the following test, which may take
between 15 minutes and 10 hours depending upon what software you are using,
the speed of your drive, what controller card you have, what CD-ROM drive
you have, etc, etc:
brik -Cb CRCLIST or brik -Cvb CRCLIST
You may want to arrange to capture the output for future reference through a
suitable additional command line argument, typically something like
">/tmp/LOGFILE" or ">ram:LOGFILE" or ">C:LOGFILE".
The test should run with no output to either the screen or the logfile, as
the case may be. If brik fails to find or correctly read any file on the
CD-ROM, it will generate a line of output giving the file name and an
appropriate error message. If you do get errors, we suggest sending the
list of files that have problems to the supplier of your CD-ROM software,
and inquire about an update.
If you do contact us to report a problem please include as many relevant
details about your hardware and software configuration as you can, and in
particular, what versions of the driver software you have tried.
===============
ISO-9660 LEVELS
===============
The ISO-9660 standard defines three "levels of interchange":
Level 1: Each file extent must be recorded on contiguous sectors.
A file name must consist of <= 8 characters + "dot" +
<= 3 characters (commonly called "8.3 names").
A directory name must consist of <= 8 characters.
Level 2: Each file extent must be recorded on contiguous sectors.
A file name must not be longer than 31 characters. It must
contain a "dot".
A directory name must not be longer than 31 characters.
Level 3: A file name must not be longer than 31 characters. It must
contain a "dot".
A directory name must not be longer than 31 characters.
In addition, there are two character classes that specify what characters
can be used in file and directory names:
d-characters: Upper-case letters, digits, and underscore ('_').
These characters can be understood by any ISO compliant
system.
d1-characters: Any character.
The interpretation of these characters is subject to
"agreement" between the system writing the CD-ROM and
the system reading it.
Most CD-ROM's intended for the IBM-PC market conform to level 1d of the
standard, while CD-ROM's for other systems tend to be closer to level 2d1,
however don't fully comply because they may have filenames without dots in
them. This CD-ROM is currently a level 1d CD-ROM.
===============================
ROCK RIDGE INTERCHANGE PROTOCOL
===============================
Only CD-ROM's that conform to level 1d are guaranteed to be readable on all
systems that support ISO-9660. Because of this limitation, an extension to
the standard called the "Rock Ridge Interchange Protocol" has been developed
by the CD-ROM industry and is widely supported on a number of different
operating systems, including most UNIX systems and some MS-DOS and Apple
systems.
When read with a software driver that understands the Rock Ridge extensions,
a CD-ROM recorded with Rock Ridge extensions appears as a CD-ROM containing
30 character filenames with no restrictions on the characters used in
filenames, while still being ISO-9660 level 1d compliant and thus fully
readable by software drivers that do not understand the Rock Ridge
extensions. This is how most of the CD-ROM industry produces and uses
CD-ROM's that are compatible between different systems.