On Fri, 10 Sep 2004, Bryan J. Smith wrote:
> On Fri, 2004-09-10 at 12:59, Eben King wrote:
>
> > Is there any error detection/correction,
>
> Of course not. That adds overhead, hence why DVD-RAM is SLLOOOOWWWW.
> The other option is to do a verify after write in software -- now that's
> even slower!
OK, how about an archiver with ECC? Enhanced tar? Checksum for each
file/block/MB?
> > or can I expect every full DVD+/-RW I write to start with 25 errors?
>
> ??? "Start" with 25 errors? Huh???
Well, some number of errors inherently (30-40 if 1E9b, 4-5 if 1E9B), PLUS
scratches, manufacturing defects, cosmic rays while reading, etc.
> The "average" of a device that has an error rate of 1 per billion would
> be 5 per 5 billion bytes. It doesn't necessarily mean you will hit it.
Sure. But the odds are you'll have _some_.
-- -eben ebQenW1@EtaRmpTabYayU.rIr.OcoPm home.tampabay.rr.com/hactar TAURUS: You will never find true happiness - what you gonna do, cry about it? The stars predict tomorrow you'll wake up, do a bunch of stuff and then go back to sleep. -- Weird Al----------------------------------------------------------------------- This list is provided as an unmoderated internet service by Networked Knowledge Systems (NKS). Views and opinions expressed in messages posted are those of the author and do not necessarily reflect the official policy or position of NKS or any of its employees.
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