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Linuxhelp _ Tips and Tricks _ Mandrake 9.2 And Lg Cdroms

Posted by: Corey Apr 1 2004, 11:42 AM

As most of you know, when Mandrake 9.2 was release, there were numerous complaints that Mandrake 9.2 broke a number of LG CdRoms. Well, this is not entirely correct, the real problem was the poor handling of commands by the CDrom's themselves. What would happen is when the kernel would send the FLUSH_CACHE command to the cdrom, which would normally do what it says, the LG CDroms would interpret it as "dump the firmware" which basically just over-written itself making the drive in-opperative.

This news has been out for a while now, and most people know about it and apply the firmware upgrades before installing Mandrake 9.2. But, if you're as forgetful as i am, and went ahead and did it anyways without realizing, you now have paper-weight and cup holder all in one.

However, do not fear, it can be fixed. After breaking the LG cdroms, you will notice that on boot-up, the bios doesn't even detect it anymore, so, applying the firmware directly is impossible. Instead, follow these steps:

1. Go to http://us.lgservice.com/ and download the appropriate firmware upgrade for your drive. If you don't know what drive you have, you can physically pull it from your system and check.

2. Create a DOS bootdisk (if you dont' have windows, go to bootdisk.com)
and create your bootdisk, as well as copying your firmware upgrade to
either that disk or a seperate disk.

3. Turn off your computer, and change the jumper settings so that it covers
the top-right and top-center pins:

CS CL MA
o x x
o o o

4. Connect your IDE cable but do not connect your power cable.

5. Power on your computer and boot into DOS with a bootdisk

6. Press and hold the eject button your cdrom while you plug the power
cable into the drive (yes, while the computer is running)

7. The led on the drive should light up and stay lit

8. Release the eject button, and proceed with applying the firmware
upgrade

9. When the upgrade completes, shutdown the computer, and put your jumper settings back to it's normal setting

10. Start up your computer, and everything should be working fine again.

Good luck !

Posted by: Hemant Apr 4 2004, 05:01 AM

I do not understand why the problem...was specific for Mandrake only..Well...i have a LG cdrom and Redhat-9.0...should i still install the firmware...

Posted by: hughesjr Apr 4 2004, 08:03 AM

I wasn't just Mandrake 9.2 ... but certain kernel versions (without a patch) that caused the problem. It just so happened that Mandrake released their 9.2 with the hosed up kernel ....

It has been my experience that upgrading firmware for these drives is good (you may hit this snag and break the drive) ... but you should be able to do it the normal way if it isn't broken.

I can't get to us.lgservice.com right now, for some reason....i get this:

CODE
Failure of server APACHE bridge:

Cannot connect to the server: timed out after 20 seconds
Build date/time: Jun 3 2002 12:30:39

Change Number: 187328

But when they come back up, they have instructions how to upgrade....

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