On Wed, Apr 24, 2002 at 10:47:30AM -0700, Ross Boylan wrote: > At 10:26 AM 4/24/02 +0200, you wrote: > >Ross Boylan wrote: > > > >Just a thought -- I have heard that CD-Rs have a 1-bit per 100kB error > >rate > >in 1 year. What that means is that in your typical 1-Meg program, > >backed up to CD-R, you're not going to be able to use it after about a > >year. > > I've heard that CDR is pretty reliable; the error rate you describe would > make it almost useless. Can anyone confirm or deny this?
100kB = 100 * 1024 * 8 = 819,200 bits. Probability of any bit being randomly dislodged = 0.00012207 %. Bytes per block on a CDR = 2352 Bytes used to store data = 2048 Bytes used for error correction = [I leave the math to you :-}] I know it looks like I have too much time on hand. [Yawn] Time to get to bed. For more reassurance, visit http://www.cdrfaq.org -Andy P.S. - Find mistakes with my math? Boy, you have even more time to waste than I do! [grin] -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
