DVD Burn Buffer Underrun

After six full days of frustration, I made a wonderful discovery about why I was constantly getting the buffer underrun notice, in IDvd, ITunes, Toast, Finder and yes Utility Burn!!!!
It was the Media stupid!!! (Thats for me) I was using Apple blanks, Verbatum blanks and TYK Blanks and every time "Buffer Underrun". I finaly bought some Cheap $15 for 50 Memorex Printable 16X's and Hayoo!! they are burning like champs. Happy New Year to ALLL and to All a good night!!

William,
I appreciate your frustration and am glad that you found a solution, but generally most of us have found Memorex to be inferior to other media. Verbatim still tops my list.
Do a search in these iDVD discussions for media recommendations for more details.
Hope Memorex still works for you, but FWIW, I wouldn't use them again....

Similar Messages

DVD writer buffer underrun

My DVD drive in my G5 tower packed in recently, so I bought a Pioneer DVR-115D to replace it. It writes CDs, but won't write a dvd. Every time I try, the system returns a buffer underrun error. I have tried four different media brands, +R and -R, have checked the jumper setting and am about to chuck it out of a window...
Using Toast 8, and the firmware of the drive is 1.12.
Any ideas, anyone?
Thanks in anticipation....

With modern media, 4X is probably going to be the slowest you can burn at. Even at a slow speed of 4X, the drive is burning over 5 MB per second. The DVR-115D has a buffer of 2 MB, so the data stream to your burner from the source location can only be interrupted for less than half a second before the buffer runs out of data and you get the buffer underrun error.
I don't think Toast 9 would provide any assistance in this area. This issue is really a hardware problem.
Where is the data that you're trying to burn stored? Local hard drive, shared folder on a network, etc? What else are you working on while burning the disc? What other programs are running?
You shouldn't be getting a buffer underrun error unless your source is very slow, prone to hiccups, or being used heavily during the burn process.
There is a newer firmware version for that drive, version 1.18. I'm not sure it would help, but it's certainly possible.

G5 quad buffer underrun error when burning dvd's

4 x 2.5 Ghz G5 Mac OS X (10.4.4)
i just tried to burn a dvd from dvdsp and keep getting a error. it is
Sense Key=ILLEGAL REQUEST
Sense Code = 0x21,0x02
Buffer Underrun
i tried using toast as well with the same result. my dvd drive is also making a lot of noise when it trys to burn. i was able to burn a dvd (data files) using the finder and the dvd burner doesn't make the same noise. i've seen this problem in other discussions and still don't have a sense of what is causing this. some have mentioned bad media, but why would the dvd burner work through the finder and not through dvdsp? or toast?
could this be a software bug or bad hardware?
any help would be appreciated.
4 x 2.5 Ghz G5 Mac OS X (10.4.4) dvdsp 4.0.2

There is a work around. In DVD Pro, "format" with the output device set to disc and the format to ".img". When this is finished, open Disk Utility and "convert" the .img file to a CD/DVD master (.cdr). This file can then be used to burn to a blank DVD. If you click the options arrow in the burn dialog before beginning the burn, you can select a speed other than "maximum". Not elegant, but it works. My HL-DT-ST DVD-RW GWA-4165B DVD drive only succeeds at burning at its maximum rate about 1/3 of the time. However, at 12X it has been quite reliable.

BURNING PROBLEM - BUFFER UNDERRUN

Hi!
There is a problem: i have brand new G5 quad and i can't burn dvd's from idvd or dvd studio pro - i have same problem - first computer tells me 'writing led-in data' and after a few attempts i have alert about buffer underrun. (The recording device reported the illegal request: Buffer underrun. (0x21, 0x02.))
What funny is - i can properly burn dvd's from finder! Can anybody tell me what is going on? Don't tell me about no name dvd's - i'm using good brand and i can trust them.
PLEASE HELP - I have bought QUAD for dvd mastering and burning.
system profiler info about my dvd drive:
Model: HL-DT-ST DVD-RW GWA-4165B
Revision: C006
Serial Number: xxxxxxx
Detachable Drive: No
Protocol: ATAPI
Unit Number: 0
Socket Type: Internal
Edited by an Apple Discussions Host
G5 QUAD Mac OS X (10.4.3)

Are you creating a disc image and burning that to a disc or are you attempting to burn directly to a disc? Unless you need dual-layer support, I would HIGHLY recommend against burning directly to disc. Both iDVD and DVDSP allow you to create a disc image of your projects.
If you cannot burn your disc image to a disc, then chuck the media (not literally) and find yourself a different brand of media. I also recommend using Toast instead of Finder or Disk Utility to burn your disc image with... you have much more control over the burn speed with Toast.
Also, you have burned DVDs using iDVD or DVDSP before, correct? Just want to make sure that this isn't your first stab at it... you might be building your projects incorrectly.

Buffer Underrun error message - what is it and how do I fix it ?

I am getting a 'buffer underrun' error message when I am burning to DVD (using iDVD); this means that only soundtrack is fully copied over, but not visuals. Any idea how I fix this ?

Hi spaceface:
Sorry you're still having this problem.
There are a lot of suggestions in these articles:
You see a "buffer underrun" error when burning a disc in Finder or iTunes
http://docs.info.apple.com/article.html?artnum=25750
Power Mac G4 (QuickSilver): Apple Optical Drives and BURN-Proof Technology
http://docs.info.apple.com/article.html?artnum=58847
Mac OS X: "Unknown Error -2147352480" when burning CD-R, CD-RW, or DVD-R media
http://docs.info.apple.com/article.html?artnum=25480
Sue

DVD burning and finder

when i set up to burn a dvd, i open two windows. one has the photos i wish to burn, one has the dvd. i drag files from one to the other just fine. but when i want to remove a file from the dvd list and i drag it to the trash that file/folder is deleted from the original too.
i asked this question previously and a response said click on the arrow at the bottom right of the finder. well, there was a circular arrow at the bottom right, but it would not click. nothing happened when i left/right click, nothing.
is that the correct arrow? what am i doing wrong?

Hi
Thanks for the links.
Re available space, I have 58.6 Gigs free out of a formatted 74.4 Gigs (eMac 80 Gig HD) Also I have 1 Gig RAM. (My eMac is the 1.25 GHZ, USB 2, Superdrive model)
I do have BUFE as per the second link - checked in Terminal. But any mention of "Buffer Underrun Error" has not been in any of the error messages.
I will try and note the 2 or 3 error messages when they occur.
I also did try burning without any other applications running.
All media has been brand new. I have found online at Staples some 4x DVD-R disks but I have yet to find any "in-store."
Interestingly, my SuperDrive, Pioneer 107D, reports itself as more capable than Apple supports - Apple only supporting DVD-R.
As far as data type, I burn a few AIFF CD's for music playback, some Data CD's for backup and storage and the odd DVD also for data storage and backup. The latest attempt to back up the approx 2.2 Gigs in my Documents Folder is when I encountered the burning issues.
Upon reflection, I have never had more than 4x available in the DVD burning process despite the advertised 8x specs. Anything beyond 4x has always been greyed out.
Do you know if there is a preference file associated with the actual burn settings?
Cheers,
Jeff

DVD burn fails on symlink

I'm trying to burn a DVD backup of a directory that contains some symbolic links to other directories, and the burn fails every time. If I drag the directory to the blank DVD, then try to remove the symbolic links from the burn folder, they actually get removed from the "real" folder! Does anyone know a way around this? At the very least, I need some way to gracefully get around having a symbolic link -- some way that doesn't involve creating a coaster, which so far is all I've been able to do.
EDIT: So, it looks like it wasn't the symlinks at all, but something more generally related to backing up the ~/Library folder, per this thread: http://discussions.apple.com/webx?128@@.68b7e70f. I have to say. I tried fixing permissions, but no luck, I just made my sixth coaster of the night trying to backup my own files. This is frankly ridiculous: Not only does the folder inexplicably avoid being burned, but it crashes the entire burn process, not at the point of preparation, but mid-burn.
Second, burning for me is slow, just 2X. I've seen a couple of recent threads on this issue, but they're with Rev B iMacs as I understand. I'm using a Rev. A, with the Pioneer DVR-KO4F. Is there any way to improve the speed?
Thanks very much-
-Alan

Hi
It sounds as if it may be lack of free disk space, or lack of contiguous free disk space. How much do you have left on your main drive? Perhaps deleting some unwanted files would help.
If your drive is highly fragmented the DVD image may be scattered all over the disk, causing a buffer underrun, especially if you're running the burning software off the same drive. You can buy software to defragment it, although OS X defragments small files on the fly so it's not normally needed. Perhaps burning at a slower speed would give the drive time to keep the buffer full. Freeing up some disk space should also help though, so there's more contiguous free space available

Another headache - "problem during multiplexing/burning - buffer underun"

Hello,
After many iDVD issues, I finally got the burning process of my DVD project.. half way through it spit my DVD out and gave me these errors:
"Errors were found during the burning process:
The recording device reported the illegal request: Buffer underrun. (0x21, 0x02.)
There was a problem during multiplexing/burning."
What is this supposed to mean and how can I just burn my DVD?!
Thank you
Chris

It's been awhile since I had this error crop up, but I know 2 things that caused it for me.
1) Bad DVD media. It happened a lot when I was using some cheap, off brand DVD-R's. More expensive Sony DVD's (white) are much better and more consistent. The time wasted with bad burns from bad DVD media is not worth the time.
2) It could even be a problem with your DVD burner going bad, but not as likely. I did have one SuperDrive replaced because I started having problems even with good, recommended brands of DVD media. However, try getting some better media first. Don't buy a lot. Try out a small package of DVD-R's or buy a disc from a friend to try out a brand.
Another possibility: Lack of sufficient, free hard drive space. Here's what iDVD 6's help file states:
"When you burn a DVD, iDVD needs temporary space on your hard disk to store the encoded files for your project. To burn your iDVD project to a single-layer DVD disc, you should have 8-10 gigabytes (GB) of free disk space on your hard disk, depending on the size of your project. For double-layer discs, you need 15-20 GB of free disk space."
Apple's support forum describes "buffer underrun" in more detail at:
http://docs.info.apple.com/article.html?artnum=25750
You might also want to defragment your hard drive (with a 3rd party utiility such as TechTool Pro) so that you don't have a fragmented hard drive when burning a project.
Speed rating of the DVD media- I've seen reports that some SuperDrives work best with media rated the same as it's maximum burn speed (e.g.- 4x, 8x, etc). I would recommend trying to find media that matches your SuperDrive burn speed, or no more than twice the burn speed.
I hope this helps.
You didn't mention which version of iDVD you were using or which operating system. Sometimes other users have tips for you based on that info.

Formatting Error.. illegal request...Buffer Underrun

Hi All..
I'm having trouble burning an FCP 5 to DSP 4. I have correctly exported the files to Mpeg-2, using both the File--Export--QuickMoive etc, and/or using Compressor.
I usually get(something like this)
Fomatting Failed. Unable to format disc, illegal request. Buffer Underrun (0x21, 0x20).
I even tried using idvd instead and it happens there also..
Out of 15-20 Tries with new DVD's each time, it only burned twice. Of those the disc would play but none of the menus worked(that could be a me problem, not linking an assest right)
Is this a Super Drive failure, Hardware Failure
I'm going to try the file on campus, and see if I can burn it there on a different MAC.
I'm sorta new to the Mac Universe, so any guidance would be helpful.
Oh yeah, I'm using a Dual Core 2.0 GHZ G5, with a 1GB of Ram, upgraded Graphic card, Latest Tiger...etc

Are you doing anything else on the Mac whilst you are burning - network access, Internet surfing, screen savers, energy savers of any kind - anything that will demand CPU processing power? If so, don't!
This question came up just about a week ago - run a search for buffer underrun in the forum. The situation occurs when the DVD writer is left waiting for data to be sent to it... it's buffer runs out of data. This is usually caused by the main processor being used by some other process and not being able to keep a steady stream of data being sent to the writer.

Recording device reported illegal request: buffer underrun

"Errors found during the burning process....illegal request: Buffer underrun (0x21, 0x02)"
Any suggestions?
Thanks, Kim

Hello Kim,
a buffer underrun occurs when the data stream to the burner is interrupted (i.e. the data is not coming fast enough). As the burner cannot interrupt the burn process, it is being aborted.
This error is commonly associated with burn speed and/or incompatible DVD media. You might want to try to create a disk image and burn that with either Disk Utility or Toast (both apps allow you to control burn speed - iDVD does not).
iDVD 4 disc image burning can be enabled through the patch HPfurz:
http://homepage.mac.com/geerlingguy/macsupport/mac_help/pages/0015-burn_idvdother.html
burn at slow speed (2x) and use high quality DVD-R media (e.g. Verbatim)
hope this helps
mish

Toast Buffer Underrun Error from iDVD .img

Happy New Year All.
Need help, iMovie project is 3hrs 59mins, disk image appears (7.46GB) and plays fine.
Toast Titanium 7.0.2 gets to Writing Lead-in/Preparing then returns Buffer Underrun Error. Prevention is checked in Recorder settings.
I've gone done to the slowest write speed with the same result.
Strange things is, whether I drag or navigate to .img to mount the disk image, a "1" in the .img title is changed to a "!" in the Toast window, and DVD Player opens up the image. Is this normal?
iMac G5 (Rev B), 20, 2.0 Ghz, 512 Ram Mac OS X (10.4.2)

Need help, iMovie project is 3hrs 59mins, disk image
appears (7.46GB) and plays fine.
Toast Titanium 7.0.2 gets to Writing
Lead-in/Preparing then returns Buffer Underrun Error.
Prevention is checked in Recorder settings.
I've gone done to the slowest write speed with the
same result.
Are you using DVD+R DL discs? What brand of media are you using?
Are you doing anything else with your computer during the burning process?
Strange things is, whether I drag or navigate to .img
to mount the disk image, a "1" in the .img title is
changed to a "!" in the Toast window, and DVD Player
opens up the image. Is this normal?
How many characters are in the file name?

CD/DVD burning SLOW

Hi,
I have this problem with my Asus A6JC laptop. It's CD/DVD burner is really, really slow. I mean, it says it can write 24x CD speed (4234kb/s) but it usually does at about 10x using k3b. It says it can do 8x DVD (11080 kB/s) but its doing at about but it's at it's best at around 0.9x
I've found this information in k3b faq http://k3b.plainblack.com/faq, but it didn't help as I have DMA enabled (both according to hdparm and dmesg output).
If I run cdrecord dev=/dev/hdb -prcap I get all the nice information about the device capabilities. Check this out:
cdrecord dev=/dev/hdb -prcap
WARNING ! Cannot gain SYS_RAWIO capability !
: Operation not permitted
Cdrecord-Clone 2.01.01a06 (i686-pc-linux-gnu) Copyright (C) 1995-2006 Jg Schilling
NOTE: this is OSS DVD extensions for cdrtools and thus may have bugs
related to DVD issues that are not present in the original cdrtools. For
more information see http://crashrecovery.org/oss-dvd.html. The original
cdrtools author should not be bothered with problems in this version.
cdrecord: Warning: Running on Linux-2.6.17-ARCH
cdrecord: There are unsettled issues with Linux-2.5 and newer.
cdrecord: If you have unexpected problems, please try Linux-2.4 or Solaris.
WARNING ! Cannot gain SYS_RAWIO capability !
: Operation not permitted
scsidev: '/dev/hdb'
devname: '/dev/hdb'
scsibus: -2 target: -2 lun: -2
Warning: Open by 'devname' is unintentional and not supported.
Linux sg driver version: 3.5.27
WARNING ! Cannot gain SYS_RAWIO capability !
: Operation not permitted
Using libscg version 'schily-0.8'.
Device type : Removable CD-ROM
Version : 0
Response Format: 2
Capabilities :
Vendor_info : 'HL-DT-ST'
Identifikation : 'DVDRAM GMA-4082N'
Revision : 'HJ02'
Device seems to be: Generic mmc2 DVD-R/DVD-RW.
Drive capabilities, per MMC-3 page 2A:
Does read CD-R media
Does write CD-R media
Does read CD-RW media
Does write CD-RW media
Does read DVD-ROM media
Does read DVD-R media
Does write DVD-R media
Does read DVD-RAM media
Does write DVD-RAM media
Does support test writing
Does read Mode 2 Form 1 blocks
Does read Mode 2 Form 2 blocks
Does read digital audio blocks
Does restart non-streamed digital audio reads accurately
Does support Buffer-Underrun-Free recording
Does read multi-session CDs
Does read fixed-packet CD media using Method 2
Does not read CD bar code
Does not read R-W subcode information
Does read raw P-W subcode data from lead in
Does return CD media catalog number
Does return CD ISRC information
Does support C2 error pointers
Does not deliver composite A/V data
Does play audio CDs
Number of volume control levels: 256
Does support individual volume control setting for each channel
Does support independent mute setting for each channel
Does not support digital output on port 1
Does not support digital output on port 2
Loading mechanism type: tray
Does support ejection of CD via START/STOP command
Does not lock media on power up via prevent jumper
Does allow media to be locked in the drive via PREVENT/ALLOW command
Is currently in a media-locked state
Does not support changing side of disk
Does not have load-empty-slot-in-changer feature
Does not support Individual Disk Present feature
Maximum read speed: 11080 kB/s (CD 62x, DVD 8x)
Current read speed: 11080 kB/s (CD 62x, DVD 8x)
Maximum write speed: 11080 kB/s (CD 62x, DVD 8x)
Current write speed: 11080 kB/s (CD 62x, DVD 8x)
Rotational control selected: CLV/PCAV
Buffer size in KB: 2048
Copy management revision supported: 1
Number of supported write speeds: 2
Write speed # 0: 11080 kB/s CLV/PCAV (CD 62x, DVD 8x)
Write speed # 1: 5540 kB/s CLV/PCAV (CD 31x, DVD 4x)
Supported CD-RW media types according to MMC-4 feature 0x37:
Does write multi speed CD-RW media
Does write high speed CD-RW media
Does write ultra high speed CD-RW media
Does write ultra high speed+ CD-RW media
(note that this is with a Sony DVD-R 8x disc inserted, so CD values are a bit misleading)
I'm actually worried worried about "WARNING ! Cannot gain SYS_RAWIO capability !". I haven't tried burning in Windows, since I haven't installed it yet Anyone could help, please?

I have the same problem, plus i can assert that EVEN the usb burner il slow and the system seems slowed itself (like as having dma disabled).

Buffer Underrun problems

I recently tried to burn a DVD project in iDVD. However, the first, third and fourth times I tried it, near the end of "Writing Lead-In", it gave me a "Buffer Underrun" error. (The second time I had tried it, it got all the way to "Finishing..." and froze.) I have no clue as to why this could be happening-- I have plenty (over 150 GB) of hard-drive space and 4.5 GB of memory. Burning the same DVD project to a disk image worked fine. Please help!
Dual 2.3 Ghz PowerMac G5 Mac OS X (10.4.7)

Hey there. Are you burning this to an internal DVD burner or one that is externally attached? This can happen not only due t memory problems but also with bandwidth issues with writing to an external drive.
Also, do you have FileVault turned on? If so, this really screws things up when burning DVDs... I have gotten the buffer underrun message with older versions of iDVD when this feature is turned on.

DVD burn fails on verify consistantly, unless you boot from another disk...

Guys,
I have a dual G4. Always seemed to be able to burn a DVD. Now, Popcorn, disk utility and toast all fail verify for DVD burns.
If I boot from my backup disk and burn using popcorn, toast or disk utility it burns and verifies fine. Both are Tiger 10.4.8, one has many things installed, the back up drive has few things.
It seems to exonerate the hardware and my verbatim media.
Any ideas?
John
G4 dual 1ghz Mac OS X (10.4.8) original DVD drive

Hi
It sounds as if it may be lack of free disk space, or lack of contiguous free disk space. How much do you have left on your main drive? Perhaps deleting some unwanted files would help.
If your drive is highly fragmented the DVD image may be scattered all over the disk, causing a buffer underrun, especially if you're running the burning software off the same drive. You can buy software to defragment it, although OS X defragments small files on the fly so it's not normally needed. Perhaps burning at a slower speed would give the drive time to keep the buffer full. Freeing up some disk space should also help though, so there's more contiguous free space available

Buffer Underrun Protection - Simple Question

Hello. I've searched this forum (and Roxio's) for about an hour, and I can't find a simple answer to this question.
I know that to create a stable DVD for replication, I should have Lossless Linking turned OFF. Yet, if I burn using Toast (which many on this forum recommend), should the "Buffer Underrun Protection" be turned on or off?
The wording in the manual is very ambiguous. Can anyone that knows please spread the wealth?
Thanks
PowerPC G5 Mac OS X (10.4.8)

Buffer underrun protection should be on normally to prevent bad burns, have not heard of it being an issue, maybe someone else here has more info,
Make sure you also speak to the replicator on how they want the DVD prepared.

DVD Burn Buffer Underrun

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