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RE: filmscanners: storage

The new burn-proof drives are the ones to go for as they render that 
explanation obsolete!

In article <ABDA876D71F9D211B39D0090274EA8E20414C93F@Floyd.logica.co.uk>, 
CookeJ@logica.com (Cooke, Julie) wrote:

> It is safest to burn at 2x, although I always burn at 6x. This depends 
> on
> the buffer underrun size of the CD recorder (why Plextors are especially
> reliable).
> Taken from http://www.fadden.com/cdrfaq/
> "The CD recording process can't be interrupted in mid-session. Once the
> laser starts writing, any interruption would create a physical gap on 
> the
> disc that could confuse CD readers. The recorder must always have data 
> to
> write, from the moment the recording starts until the session ends. To 
> avoid
> a situation where a temporary slowdown in the computer causes the write
> process to fail, the makers of CD recorders put a write buffer in the 
> drive,
> usually between 512K and 4MB in size. Data read from the hard drive, 
> tape,
> or another CD is stored in the buffer, and pulled out as needed by the
> recorder. 
> If the recorder requests data from the write buffer, but there's none 
> there,
> it's called a buffer underrun. The disc is still spinning, but there's 
> no
> data to write, so the recording process aborts. 
> You can still use the disc with multisession CD-ROM drives by closing 
> the
> session and starting another, assuming there's enough space left on the 
> CD,
> and assuming your pre-mastering software didn't choose to finalize the 
> disc
> for you. If you were using disc-at-once recording, you're probably out 
> of
> luck. 
> Advice for preventing buffer underruns is scattered throughout this 
> FAQ. A
> brief summary: 
> Use a fast, AV-friendly hard drive (i.e. one that doesn't do slow 
> thermal
> recalibrations). Pretty much all drives sold in the last couple of years
> fall into this category. You don't need a screaming AV-optimized drive. 
> Record at a slow speed - it takes longer to empty the buffer when 
> recording
> at 1x. 
> Don't do anything else with the computer while recording. Don't record 
> from
> a file server. 
> Defragment your HD, especially if you're doing on-the-fly recording. 
> Record from a disc image file rather than on-the-fly. 
> Depending on your setup, putting the recorder and your hard drive on
> separate SCSI controllers may be necessary. 
> Keep your CD-R cool. Sometimes the drives fail when they overheat. 
> Also watch out for things like anti-virus programs that wake up, virtual
> memory settings that cause swapping, screen savers that activate during 
> the
> CD creation process, unusual network activity, and background downloads 
> of
> data or faxes. One way to check is to run the HD defragmenter in Win95. 
> If
> it restarts every few seconds, it's because something is hitting the 
> drive."
> HTH 
> Julie
> >In regard tp speed of the burn, it is my understanding that it is best 
> to >use a
> >slow burn speed (2x) as opposed to the higher speeds if one wants to
> minimize
> >potential read errors on client's computers...any comments?
> >Mike Moore
> <:><:><:><:><:><:><:><:><:><:><:><:><:><:><:>
> Larry Berman
> Web Sites for Artists: http://BermanGraphics.com
> Compare Image Compression from the top
> Graphics Programs: http://ImageCompress.com
> Explore the Art Show Jury process from a web site:
> http://ArtShowJury.com
> <:><:><:><:><:><:><:><:><:><:><:><:><:><:><:>


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