Re: [ARSCLIST] CD-R error rates

["Richard L. Hess" <arclists@xxxxxxxxxxxxxxx>]

At 09:42 PM 2008-01-07, Richard L. Hess wrote:

One more data point for tonight...

An 80-minute MAM-A gold archive CD just burned at 16x showed 3.8 
Avg/sec and 21 Max/second C1 errors.

This is much worse than the silver one burned a few weeks ago in the 
same drive, but better than the 32x burn by a bit. The Real time and 
32x are gold, the 16x is silver.

                        Real Time       16x Ag         16x Au           32x
C1 avg/sec           6.5                 0.7            3.8             4.7
C1 Max/sec          36.0                 18            21               28

There are two possibilities with the gold (Au) disk.
  (1) The silver is higher reflectance = fewer errors
  (2) The silver is from an older batch (I think several years)
         and the coating is thicker than the contemporary
         see-through-the-gold MAM-A Archival discs.

While actually none of these is evil, the differences are surprising 
on one level and not on others.

Cheers,

Richard


Richard L. Hess                   email: richard@xxxxxxxxxxxxxxx
Aurora, Ontario, Canada       (905) 713 6733     1-877-TAPE-FIX
Detailed contact information: http://www.richardhess.com/tape/contact.htm
Quality tape transfers -- even from hard-to-play tapes.