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

Warner Losh imp at
Sun Jul 22 23:05:02 CDT 2018

Throughout this whole thread, I've been tempted to say that you get better
data fidelity if you take a green magic marker and mark the edges of the

Of course, I know people here will get that old, tired meme...  It got me
wondering, though, if anybody tested that hypothesis for longevity since
the marker would seal the edges... maybe :)


On Sun, Jul 22, 2018 at 9:07 PM, hollandia--- via cctalk <
cctalk at> wrote:

> Is there any relationship betwween the SPEED at which laser-disks are
> written and the length of time that the recording will last?
> Kurt
> >> On Jul 22, 2018, at 6:47 PM, Chuck Guzis via cctalk
> >> <cctalk at> wrote:
> >>
> >> On 07/22/2018 06:34 PM, Zane Healy via cctalk wrote:
> >>
> >>> On premises has the exact same problem as tape.  You must have a
> >>> refresh plan.  That’s the advantage of off prem, you don’t have to
> >>> worry about refresh.
> >>
> >> I don't exactly follow you.   In the case of a specific example for NASA
> >> and its vendors a given mission may involve tens of thousands of tapes.
> >> When a mission concludes, tapes are usually bundled off to a warehouse
> >> and then later junked.   There's no money in the mission budget for
> >> preservation ad perpetuum.
> >>
> >> --Chuck

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