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Why are most of my burns "underrun" the buffer?

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Why are most of my burns "underrun" the buffer?

Postby Harrier on Thu Jun 05, 2003 5:34 pm

Okay, i've noticed it happens too often. Maybe even every burn.
This burn for instance is 40X with DAO of a DIVX movie, three txt files and one installer file..

Though the burn came out Ok it annoys me because it takes about 5 minutes for such burn.

Image
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Postby dhc014 on Thu Jun 05, 2003 6:10 pm

wth Harrier? :lol: You could crop the picture or hold Alt+Print Screen rather than erasing the text on your icons...

There's no problem there. The "Buffer Underrun Protection Activated" message means that buffer Underrun Protection is turned on and ready. It will appear before any burn when a drive has Buffer Underrun Protection.
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Postby Harrier on Thu Jun 05, 2003 6:18 pm

But dude, it doesn't make sence..
The burn is at 85%. I took the picture just when the writer ran out of buffer memory.
It happend twice during that burn.

And sorry about the picture.
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Postby Inertia on Thu Jun 05, 2003 8:21 pm

If buffer underrun protection is invoked, it means that there is a data throughput bottleneck in your system.

Things to try before burning:

Defrag hard drive(s).
Close background applications with Ctrl-Alt-Del except for Explorer, Systray & Nero. Don't multitask while burning.
Delete files in Windows/Temp directory and Nero temporary directory.
Make sure DMA is enabled for the burner.
Make sure there is adequate free space on the hard drive for temporary files.
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Postby rdgrimes on Thu Jun 05, 2003 8:49 pm

Are you burning from another CD drive?
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Postby CDRecorder on Fri Jun 06, 2003 2:06 am

Sounds like a DMA problem to me.
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Yes,Inertia is correct.

Postby pranav81 on Fri Jun 06, 2003 2:12 am

Dear Harrier,
read the instructions in Inertia's post and most of your burning problems will get solved.By the way what is configuration of your machine?
See ya later,


::Pranav::
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Postby CDRecorder on Fri Jun 06, 2003 2:25 am

After further thought, I am wondering if it could be that the hard drive doesn't have DMA enabled. It doesn't look like a problem with DMA on the burner.
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Postby 4zkxa on Fri Jun 06, 2003 6:17 pm

5 minutes and you complain? It took me 10 minutes to burn at 48x for god's sake.
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Postby CDRecorder on Fri Jun 06, 2003 7:48 pm

4zkxa wrote:5 minutes and you complain? It took me 10 minutes to burn at 48x.


Then something was wrong; burning at 48x should take somewhere between 2:30 and 2:45. Try enabling DMA like was suggested above. You can find instructions in the FAQ forum here at CDRLabs.
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Postby rdgrimes on Fri Jun 06, 2003 8:42 pm

burning at 48x should take somewhere between 2:30 and 2:45
Not if SmartBurn is invoked due to crappy media or buffer under-run.
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Postby UALOneKPlus on Fri Jun 06, 2003 11:21 pm

To just take a "picture" of the Nero dialogue box, just make sure it has the windows "focus", then hit "ALT + PrtSc", and it will only copy the selected window.

I like the wall paper. What is that, and can I get a copy?
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Postby CDRecorder on Sat Jun 07, 2003 2:06 am

rdgrimes wrote:
burning at 48x should take somewhere between 2:30 and 2:45
Not if SmartBurn is invoked due to crappy media or buffer under-run.


Good point, rdgrimes. I had forgotten about the possibility that the drive would limit the speed if poor media was used. :oops:
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Postby falcon on Tue Jun 10, 2003 1:37 pm

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Postby blakerwry on Wed Jun 11, 2003 3:47 am

LiteOnGuy wrote:
rdgrimes wrote:
burning at 48x should take somewhere between 2:30 and 2:45
Not if SmartBurn is invoked due to crappy media or buffer under-run.


Good point, rdgrimes. I had forgotten about the possibility that the drive would limit the speed if poor media was used. :oops:


How is that a good point? if the drive is limiting the speed then it's not really burning at 48x. If it takes 10 minutes to burn 700MB, then you're burning at ~8x average speed.

Code: Select all
Known:
700,000KB = 700MB
150KB/sec = 1x CD Speed

Calculation:
700,000KB [b]/[/b] 10min = 70,000KB/min

70,000KB/min [b]/[/b] 60sec/min = 1166.666KB/sec

1166.666KB/sec [b]/[/b] 150KB/sec = 7.7x speed

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Postby CDRecorder on Fri Jun 13, 2003 11:12 pm

blakerwry wrote:How is that a good point? if the drive is limiting the speed then it's not really burning at 48x. If it takes 10 minutes to burn 700MB, then you're burning at ~8x average speed.


True, but Nero might display 48x burning speed, so it would appear as if it were burning at 48x even though it was really burning at some other speed.
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