On Sat, May 19, 2007 at 07:55:55PM +0200, Johan Wevers wrote: > Well, I'm able to do some tests now with old backup CD's. All my old > backups are still perfectly readable, the oldest being from February > 1998. I'll keep testing. > > With modern equipment, not burning discs with maximum speed seems to > help. To chime in for a moment, I have CDR backups starting in mid-1995 (doing backups once a month approximately). Of those earliest 10 discs, all of them are still readable, but the media is visibly degrading in 50% of them.
- 2 discs (both Dysan, with a gold-looking surface) have the surface foil flaking off around the edges - 3 discs (various) show imperfections in the coloured layer, blotchy. The burner that I had would only reliably burn the first ~500Mb of the discs, so the foil and other problems around the edges have not impacted my data yet. An interesting twist on this, is that some of my newer drives fail to read the old discs properly. The older drives work fine however. -- Robin Hugh Johnson Gentoo Linux Developer & Council Member E-Mail : [EMAIL PROTECTED] GnuPG FP : 11AC BA4F 4778 E3F6 E4ED F38E B27B 944E 3488 4E85
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