On 11/29/2011 2:41 PM, steve harley wrote:
interesting info; a couple of thoughts:
* the CDs that appeared not to have errors may still have had subtle
errors you haven't noticed
Yes - some of the files copy OK but are corrupted. Not many but they
show up. I would no be surprised if I opened a file now and then and
found that it ended at the wrong place or had some sort of error.
* it would be nice to have a copy mechanism that did not stop at
errors, but that did tell you which files had errors
The freeware program XXCOPY will do this. It is basically XCOPY on
steroids. It list the files and if it cannot read one notes that it is
corrupted. At the end of the copy it creates a little report the
summarizes the number of files found, successfully copies, and not
copied, average data transfer rate, time to copy, etc. The only rub is
that XXCOPY takes 10 to 11 minutes to copy a full CD with no errors and
XCOPY takes only 5 to 6 minutes.
* CD-ROM is not a particularly safe archiving medium, both from your
specific info and from general knowledge (i also have several old
CD-Rs, as well as regular music CDs, that have failed); redundancy is
critical in any kind of digital archive, but more critical with CD-ROM
Yeah - that's why I am trying to move these at long last. I copied
hundreds of DVD's a few years ago when I got started with external hard
drives, but they copy a lot faster than CDR's and put these off. There
are film scans so I do have the original shots, mostly well cataloged
and filed away. (Mostly....)
- Mark C
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