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

Geoffrey Oltmans oltmansg at
Mon Jul 23 13:00:09 CDT 2018

On Sun, Jul 22, 2018 at 7:13 PM, Charles Dickman via cctalk <
cctalk at> wrote:

> Below is a sampling of disks recorded between 2001 and 2009. It is
> likely that the disks of the same type were from the same package
> because I don't use many disks. They were stored without much care,
> but in a spaces tolerable to humans for reasonable periods.
> Imation     CD-R    recorded 2003/12/29  readable
> Imation     CD-R    recorded 2004/01/02  recoverable errors
> Imation     CR-R    recorded 2001/12/18  recoverable errors
> Imation     CD-R    recorded 2005/07/15  recoverable errors
> Imation     CD-R    recorded 2001/12/24  recoverable errors
> TDK          DVD-R recorded 2006/02/05  recoverable errors
> TDK          DVD-R recorded 2009/09       unrecoverable errors. The
> edges of the disk have a strange faded coloration.
> TDK          DVD-R recorded 2007/10/07  readable
> Memorex  CD-R    recorded 2005            unrecoverable errors
Probably a good idea to use something like RAR with parity. I know I have
downloaded some multi-segment binaries in RAR format from usenet  with
several missing segments and as long as I had the parity file set it could
successfully recover the entire archive.

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