how good is the data reliability with CD ROM and DVD RAM?

Jon Elson elson at
Sun Jul 22 11:11:35 CDT 2018

On 07/22/2018 10:52 AM, Chuck Guzis via cctalk wrote:
> On 07/22/2018 06:33 AM, Paul Koning via cctalk wrote:
>>> On Jul 21, 2018, at 3:25 PM, Carlo Pisani via cctalk <cctalk at> wrote:
>>> ...
>>> and what about magnetic-tapes? (e.g. DDS4, DLT, LTO2)
>>> which of them lasts for the most?
>> I don't know specifically.  I do know that plain old audio tapes may fail -- I have perhaps 100 cassettes recorded in the 1970s.  Most of them are fine, but essentially all of them that are Fuji brand have failed utterly.
> Half-inch open-reel tape at 1600 PE density.  Should be good for 50
> years at least.
Well, you are one of the experts in this, but it all depends 
on storage conditions.  Also, the extended-length tapes were 
too thin, and suffered from creasing and print-through.  
Badly stored, and you can kiss your data goodbye in less 
than 5 years.


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