buffer underrun

[flip]

my cd writer gives a buffer underrun. when i start to write he is doing perfectly well,then suddenly he gives the underrun. This has already cost me a view boxes of cdr,what can i do about it???

[NDC]

Check the option to copy to disk first before copying to CD. That will solve the problem. If this doesn't solve the problem for you either, it's quite possible that the software is installed wrong or the CDR drive is defective. Hope this helps! http://sysopt.earthweb.com/forum/smile.gif

[canit]

NDC, what about copying from a scsi(plextor ultraplex 40x)cd-rom? Saw it in Maximum PC's dream machine 2000.

[Fingers]

You're copying from CD to CD-R, right? This can sometimes be a problem when the CD and CD-R(W) are connected to the same IDE cable. If you do alot of CD to CD burning, it is better to put the CD-Rom and CD-R on different IDE channels. Two CD devices on the same channel will have a lower sustained transfer rate than two CD devices on different IDE channels. Actually, this is also true for HDD's. The downfall to this method is that when you put your CD-Rom on the HDD cable, you will slow down your CD to HDD transfer rate. I personally do it the way NDC suggested, copy the CD to the HDD first, then burn it to the CD-R. It may be slower, but eventually making all those "coasters" will get expensive.

Here's a similar thread that may provide some help, check out the links provided by codybear.
http://sysopt.earthweb.com/forum/Forum2/HTML/003729.html


[This message has been edited by Fingers (edited 09-03-2000).]

[NDC]

The downfall to this method is that when you put your CD-Rom on the HDD cable, you will slow down your CD to HDD transfer rate.

I think you meant that you will slow down your HDD to CDROM transfer rate, right?

Anyways,
Hard disk data transfer's data faster than CDROM http://sysopt.earthweb.com/forum/smile.gif

But connecting your CDROM or CDRW on the same channel as your hard drive would not be a such a bright idea! That is a NO NO! It's best to keep CDRW and CDROM on the same channel. Connecting a slower device such as CDROM or CDRW to the same channel as your hard drive will make a bottleneck for your hard drive.

Rule of the thumb: IDE channel BUS moves at the frequency of the slower device.

EX: DMA33 + DMA66 = DMA33 http://sysopt.earthweb.com/forum/frown.gif

By the way, I use IDE TEAC CDROM 32X and IDE Plextor 8/4/32 , and I burn my CD's from CD to CD at 8X and no buffer underruns. But there are certain CD's that seem to cause buffer underruns, such as CD's that need HEAVY audio extraction. When that happens, I just copy to hard disk first and then to CD.

BTW, as to using a SCSI CDROM will not make the CD-ROM faster, it will just put less utilization on your CPU, Using it may help little or non as for BUFFER UNDERRUNS, if your burner is IDE interface. If they were BOTH SCSI interface, that would be a different story. http://sysopt.earthweb.com/forum/smile.gif



[This message has been edited by NDC (edited 09-03-2000).]

[NDC]

LOL, hey that happens to me all the time, now, I take the time to read my messages again before I leave the topic, that's why you see [This message has been edited by NDC.....] ALL THE TIME! LOL Seeya around fingers, take care! http://sysopt.earthweb.com/forum/smile.gif

[Ed_S]

I use to get buffer underruns when I was first learning how to use my CDR. Found some tips that helped quite a bit.
IDE channels have been covered, I'll skip that.

Before doing a burn, reboot the system to clear memory.
Turn off any running apps including screensavers.
Set up your software & get ready to burn.
If using EZ-CD Creator, run the "validate layout" function just prior to starting the copy.
(other software may have similar)
Start the copy.
Walk away. Literally. Go eat, or whatever. Leave it alone!

Some of this may be unneccesary depending on your equipment, but you didn't list it, and these steps CAN'T hurt.

Ed

[codybear]

http://www.resource.simplenet.com/primer/primer.htm

[NDC]

Yeah. Ed's right. You shouldn't do multi-tasking while you are burning CD's on a SINGLE PROCESSOR system. You may utilize your CPU to the point where it will cause a buffer underrun. Best thing is to just walkaway and leave the computer be. As for a Dual Processor system, it would be a different story. I get buffer underruns on my single processor system if I do multi-tasking that is heavy, but as for the system with dual processor, I can go about doing everything without causing it to cause a buffer underrun, except scannning. But I anyone who uses a scanner would know that.... http://sysopt.earthweb.com/forum/smile.gif

[Deke]

I had the same problem on some cheap princo cdrw's i got from a computer show/sale thingy. I found that if slow the recording speed down one notch it worked ok. Again I only had the problem on cheap cd's


Hope this Helps
Deke

[Fingers]

Oh... now I see it. This is what I originally wrote The downfall to this method is that when you put your CD-Rom on the HDD cable, you will slow down your CD to HDD transfer rate. This is what I should have written. The downfall to this method is that when you put your CD-Rom on the HDD cable, you will slow down the rate at which the CD-Rom can transfer to the HDD.

Silly me... It did sound like I was saying the CD-Rom was faster than the HDD. http://sysopt.earthweb.com/forum/smile.gif

Since I've finally caught onto my mistake, the rest of my message has become pointless...thus *deleted* http://sysopt.earthweb.com/forum/smile.gif

NDC, your lucky you edited your little faux pas before I had a chance to point it out. lol http://sysopt.earthweb.com/forum/smile.gif

[This message has been edited by Fingers (edited 09-03-2000).]