> On Jan 31, 2023, at 5:03 PM, Zane Healy via cctalk <cctalk@classiccmp.org>
> wrote:
>
> On Jan 31, 2023, at 10:22 AM, Steve Lewis via cctalk <cctalk@classiccmp.org>
> wrote:
>>
>> I know the first generation CD/DVD disc are known to "go bad" - the
>> material itself somehow degrades and becomes unreadable by modern drives.
>> I'm not sure if that's still the case with newer or more modern CD/DVD disc
>> (not just that they're newer, but are they a more durable material or
>> casing?)
>
> Choosing the right blanks made a world of difference. The as I said
> recently, all the Verbatim DataLifePlus I’ve tried to recovered have been
> fine. The main data I lost was stored on a DVD-R blank from another
> manufacturer.
>
> I’m now looking at switching to Verbatim M-Disc’s.
>
> As part of my recent efforts I’ve regained access to data that while live on
> spinning disk, had become corrupted sometime between 1997 and 1999.
>
> Zane
I don't remember if RW (erasable) DVDs exist, or if that is only offered for CD
blanks. As I understand it, the RW technology has nowhere the longevity of the
write-once kind. Makes sense since those are reversible, which suggests that
the reversing might happen gradually in storage, similar to the way that NVRAM
(flash memory) gradually fades which OTP ROMs tend to last forever unless they
have a process defect.
paul
