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RE: [Digital BW] Image Burning: Buffer Underrun Reason/technique?

RE: [Digital BW] Image Burning: Buffer Underrun Reason/technique?

2002-01-30 by Lanette Miller

Buffer Underrun errors are caused when the CD writer tried to write to the
CD but the data was not there fast enough. Several things can cause this.
Don't run any other programs while trying to burn a CD. Some CD writers have
the option to increase the cache and that could help. You should also burn
at half the rated speed for the CD Drive - 4x. The speed of the CDs are fine
as long as they are equal or greater than the burner speed.


Lanette
Show quoted textHide quoted text
> -----Original Message-----
> From:	Steadman Uhlich [SMTP:steadmanuhlich@...]
> Sent:	Wednesday, January 30, 2002 8:53 AM
> To:	DigitalBlackandWhiteThePrint@yahoogroups.com
> Subject:	[Digital BW] Image Burning: Buffer Underrun
> Reason/technique?
> 
> Hello Group, 
> 
> Since there are obviously some folks here that keep up to date on the
> reasons our machines work as they do....I have a simple technology
> question for you..
> 
> I have a firewire external CD Burner that I use to burn archive CDs of
> images.  This is connected to a 800mhz PC with Windows 2000 and 500mb RAM.
> 
> 
> Just last night I tried to back up images (burn) to some 16x CDroms.  I
> picked the speed using Adaptec Easy CD Creator software....the speed was
> 8x which is the rated speed for the burner.  
> 
> The Verbatim blank CDROMS are 16x and 700mb version.
> 
> I selected about 600mb of data image files and clicked burn....and waited
> and watched as the burn software showed progress to about 93% or so and
> then the CD would report "ERRORS REPORTED."
> 
> The error?  "Buffer Underrun."  
> 
> This is the first time I have encountered this problem.  It created
> Coasters as the  images would not open in Photoshop.   I have not had this
> problem before (I used to use Kodak and Maxell CDs).   What gets me is
> that I went through this several times (wasted time each time) waiting to
> backup the disc so I could use my CF card.   The delay was "costly" in
> this case. I want to avoid that. 
> 
> I have not read up on this issue/problem and simply want to know if there
> is a technique to use or a simple step to take/avoid that I should know
> about.  I was blissfully ignorant of the issue until now. 
> 
> Is it that I am sending too much data for my memory? 
> Is it that I am using an 16x disc with a 8x burn rate?
> Is it the media?
> Is it that I am using a 700mb disc and should limit the amount of data to
> write to it (say to 500mb?)?
> 
> I know there are CD burners that promote the use of "Burnproof"
> technology...this burner does not have that though.  
> 
> Suggestions?
> 
> Thanks in advance. 
> Steadman
> 
> 
> 
> 
> [Non-text portions of this message have been removed]
> 
> 
> 
> Please visit the Group Homepage to check the Files, Bookmarks, Polls and
> other resources as they are often being updated. The page is at:
> 
> http://groups.yahoo.com/group/DigitalBlackandWhiteThePrint
> 
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Re: [Digital BW] Image Burning: Buffer Underrun Reason/technique?

2002-01-30 by Steadman Uhlich

Thanks for the tips Lanette. 

I thought it might be something like that.  

But...I had not had this problem before and successfully burned at 8x (max speed for the drive).  

I also only had the CD burner software running at the time (as I was cautious).  

So...other variables must be coming into the picture...

"Different media (brand)?"

"More data?"  (earlier disks were 600mb and I burned about 500mb to them....these later disks were 700mb and I was trying to burn 600mb to them)

Hmmmm..

Steadman






[Non-text portions of this message have been removed]

RE: [Digital BW] Image Burning: Buffer Underrun Reason/technique?

2002-01-30 by Lanette Miller

The things you mentioned shouldn't be a problem but that doesn't mean that
they are not. So if you have a different brand of CD disks give that a try.
Check task manager and check what processes you have running, there could be
things you are not aware of. You may want to tell the operating system to
prioritize foreground tasks, if that is not already set. There is  also a
possibility that your hard disk is fragmented. 

Lanette

Re: [Digital BW] Image Burning: Buffer Underrun Reason/technique?

2002-01-30 by Bob Frost

Hi Steadman,

The cause of buffer under-runs is quite simple; the info is not being sent
from your hard disk to the CD fast enough, so that the CD-writer memory
buffer runs out of info.

The solutions are various: buying a CD writer with a bigger memory buffer,
using a faster hard disk, using a slower write speed, etc, etc,

Windows XP tries to avoid these problems by always copying the files to be
burnt to a new directory, and then copying them from this new directory to
the CD. This helps to avoid the problems with the hard-disk head moving all
over the place locating the files and their fragments for copying.

If you have two hard disks, copy all the files to the non-system disk before
burning them from that location. The hard-disk heads on that disk can then
devote all their attention to reading the unfragmented files to be burnt,
without having to update windows swap files etc.

Some burning software claims to prevent buffer underruns, perhaps by caching
larger chunks of the info before starting the burn, or other means.

I solved the problem on my CD writer by simply reducing the write speed from
it's max of 10x to 4x. This seems to be the simplest solution; it's free and
simply means you drink a whole cup of coffee while it burns instead of half
a cup!

Bob Frost.
Show quoted textHide quoted text
----- Original Message -----
From: "Steadman Uhlich" <steadmanuhlich@...>
>
> I selected about 600mb of data image files and clicked burn....and waited
and watched as the burn software showed progress to about 93% or so and then
the CD would report "ERRORS REPORTED."
>
> The error?  "Buffer Underrun."
>
> This is the first time I have encountered this problem.  It created
Coasters as the  images would not open in Photoshop.   I have not had this
problem before (I used to use Kodak and Maxell CDs).   What gets me is that
I went through this several times (wasted time each time) waiting to backup
the disc so I could use my CF card.   The delay was "costly" in this case. I
want to avoid that.

Re: [Digital BW] Image Burning: Buffer Underrun Reason/technique?

2002-01-30 by Moreno Polloni

> The solutions are various: buying a CD writer with a bigger memory buffer,
> using a faster hard disk, using a slower write speed, etc, etc,

Most of the newer CD Burners incorporate some sort of buffer underrun
protection built into the hardware, making ruined disks a thing of the past.

Re: [Digital BW] Image Burning: Buffer Underrun Reason/technique?

2002-01-31 by Denise E. Kissinger

Unless you're like me and it takes 45 minutes to burn 1 cd.

Denise
Show quoted textHide quoted text
----- Original Message -----
From: "Bob Frost" <bobfrost@...>
To: <DigitalBlackandWhiteThePrint@yahoogroups.com>
Sent: Wednesday, January 30, 2002 2:42 PM
Subject: Re: [Digital BW] Image Burning: Buffer Underrun
Reason/technique?


> Hi Steadman,
>
> The cause of buffer under-runs is quite simple; the info is not
being sent
> from your hard disk to the CD fast enough, so that the CD-writer
memory
> buffer runs out of info.
>
> The solutions are various: buying a CD writer with a bigger memory
buffer,
> using a faster hard disk, using a slower write speed, etc, etc,
>
> Windows XP tries to avoid these problems by always copying the files
to be
> burnt to a new directory, and then copying them from this new
directory to
> the CD. This helps to avoid the problems with the hard-disk head
moving all
> over the place locating the files and their fragments for copying.
>
> If you have two hard disks, copy all the files to the non-system
disk before
> burning them from that location. The hard-disk heads on that disk
can then
> devote all their attention to reading the unfragmented files to be
burnt,
> without having to update windows swap files etc.
>
> Some burning software claims to prevent buffer underruns, perhaps by
caching
> larger chunks of the info before starting the burn, or other means.
>
> I solved the problem on my CD writer by simply reducing the write
speed from
> it's max of 10x to 4x. This seems to be the simplest solution; it's
free and
> simply means you drink a whole cup of coffee while it burns instead
of half
> a cup!
>
> Bob Frost.
>
>
> ----- Original Message -----
> From: "Steadman Uhlich" <steadmanuhlich@...>
> >
> > I selected about 600mb of data image files and clicked burn....and
waited
> and watched as the burn software showed progress to about 93% or so
and then
> the CD would report "ERRORS REPORTED."
> >
> > The error?  "Buffer Underrun."
> >
> > This is the first time I have encountered this problem.  It
created
> Coasters as the  images would not open in Photoshop.   I have not
had this
> problem before (I used to use Kodak and Maxell CDs).   What gets me
is that
> I went through this several times (wasted time each time) waiting to
backup
> the disc so I could use my CF card.   The delay was "costly" in this
case. I
> want to avoid that.
>
>
>
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>
>
>
>
> Please visit the Group Homepage to check the Files, Bookmarks, Polls
and other resources as they are often being updated. The page is at:
>
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>
> Please follow these basic guidelines:
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> - Include the address of your website, if you have one.
> - As threads develop, trim off excess portions of earlier messages
to keep them short.
> - As the topic of a thread changes remember to change the subject
header.
> - Good manners are required at all time. No personal attacks or
"flames."
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> - Before posting a question, search the message archives and the
various resources on the homepage.
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>
>


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Re: [Digital BW] Image Burning: Buffer Underrun Reason/technique?

2002-01-31 by Steadman Uhlich

Ah yes....but I live in the past (my firewire CDRW is only 10 months "old")....

Wish I had the buffer underun protection...but will defrag my hardrive (I only have one in the laptop) and slow the sucker down from a whopping 8x to 4x...

Thanks to all for advice so far....You too Bob Frost (a good tip description thanks...)

Steadman
Show quoted textHide quoted text
  ----- Original Message ----- 
  From: Moreno Polloni 
  To: DigitalBlackandWhiteThePrint@yahoogroups.com 
  Sent: Wednesday, January 30, 2002 3:10 PM
  Subject: Re: [Digital BW] Image Burning: Buffer Underrun Reason/technique?


  > The solutions are various: buying a CD writer with a bigger memory buffer,
  > using a faster hard disk, using a slower write speed, etc, etc,

  Most of the newer CD Burners incorporate some sort of buffer underrun
  protection built into the hardware, making ruined disks a thing of the past.



        Yahoo! Groups Sponsor 
              ADVERTISEMENT
             
       
       

  Please visit the Group Homepage to check the Files, Bookmarks, Polls and other resources as they are often being updated. The page is at:

  http://groups.yahoo.com/group/DigitalBlackandWhiteThePrint

  Please follow these basic guidelines:
  - Include your full name with your message.
  - Include the address of your website, if you have one.
  - As threads develop, trim off excess portions of earlier messages to keep them short.
  - As the topic of a thread changes remember to change the subject header.
  - Good manners are required at all time. No personal attacks or "flames."
  - Complete your Yahoo profile.
  - Before posting a question, search the message archives and the various resources on the homepage. 




  Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service. 



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