Hello mmstam,
To add to Ron H's posting
Have a look at this article. It may be relevant to your prºblem.
Factors that affect writing to or reading from optical media
This document discusses things can affect your computer's ability to write
CD and DVD discs, and what can potentially affect their being read by other
computers and consumer electronics equipment.
Several things can affect the mastering of recordable media and the ability
to read them by other devices. These factors equally apply to CD-R, CD-RW,
DVD-R, and DVD-RW media.
To consistently achieve successful burns, be aware of these factors
The source for the media
Third-party discs that conform to the specifications of the drive should
operate as expected. However, since Apple has not physically tested these
discs, you should contact the manufacturer if full compatibility cannot be
achieved.
Take special care with media that's rated at higher burn speeds than what
the drive supports. Example - using 16x DVD-R media with a drive that's only
rated to burn up to 4x or 8x speeds. Generally, you can use such
newer/higher-speed media in older drives - in some cases, this newer media
can't be recognized consistently, and will either burn at a speed slower than
the maximum rated for the drive, may result in media that completes the burn
but performs poorly afterwards, or may not be recognized at all. When in
doubt, use Apple media, or 3rd party media that's designed specifically for
the capabilities of your optical drive. Apple-brand discs are tested and
qualified for use with Apple-installed optical drives and are fully
compatible.
The optical drive used to master the media
Earlier optical drives may have issues reading modern media. Early DVD-ROM
drives, for example, may not read burned DVD-R or DVD-RW discs. Some may read
DVD-R, but not DVD-RW. This is true for consumer audio CD players, car audio
players, and DVD-Video players, too. Depending on when the drive was
manufactured, it may or may not be compatible with certain burned media.
SuperDrives may have issues reading particular brands of media, or
newer/high-speed DVD-R/DVD+R/DVD-RW media that was not available when the
drive was introduced. Check the documentation that came with the player, or
check with the manufacturer for more information.
A firmware update may be available that improves compatibility. Even if it
is considered "compatible" with certain media, you may encounter issues with
some brands of media, or issues with media burned at certain speeds
The software used to master the media
Make sure the application software you use to master the discs is up to
date. Make sure the options you choose in the application, such as the burn
speed, work with the drive and the media you are using. Varying the burn
speed may affect the compatibility of the media in the playback device. This
may make a difference in the accuracy of the mastering of an audio CD or DVD.
Burning applications often perform a verification after the burning process
is complete. This ensures that the final disc is ready for playback. If the
verification fails, try choosing a slower burn speed.
The connection method for your optical drive
If your burner is connected via USB, you may not be able to burn at the
highest speed the drive is capable of using. Trying to burn at too high of a
speed may lead to a failed burn because there is not enough bandwidth on the
bus.
If you have a SCSI burner, make sure the SCSI cabling is configured
correctly, and that the SCSI chain is properly terminated. Issues may result
from improper termination. Also, make sure you use properly-shielded cables
to connect the burner to the computer.
To successfully use your burned media, be aware of these factors
The source of the media
In general, if you are able to successfully burn discs in a drive, that
drive should be able to read the same discs without an issue.
Note: Apple optical drives work with standard 650 MB-capacity discs, but not
all drives work with 700 MB-capacity (80 or 90 minute) discs.
The optical drive used to read the media
Earlier optical drives may have issues reading modern media. Early DVD-ROM
drives, for example, may not read burned DVD-R or DVD-RW discs. Some may read
DVD-R, but not DVD-RW. This is true for consumer audio CD players, car audio
players, and DVD-Video players, too. Depending on when the drive was
manufactured, it may or may not be compatible with certain burned media.
Check the documentation that came with the player, or check with the
manufacturer for more information. A firmware update may be available that
improves compatibility. Even if it is considered "compatible" with certain
media, you may encounter issues with some brands of media, or issues with
media burned at certain speeds.
The software used to read the media
You may find that software designed to copy data to discs cannot
successfully copy video or audio to discs. Make sure you are using a current
version of the application, and that the software can copy the kind of data
you are working with.
For best success in reading media, use the latest version of the Mac OS.
Also, make sure that you burn the disc in a format that can be used by the
operating system that will read the disc. For example, a CD burned in Mac OS
Extended (HFS Plus) format may not work with a Microsoft Windows-based
computer.
If a disc's format is not normally recognized by the computer's operating
system, you may need to install software that allows the computer to
recognize it.
Also look here
DVD Frequently Asked Questions (and Answers)
<
http://dvddemystified.com/dvdfaq.html>
I hope this post is helpful.
Let us know how it works ºut.
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