ard(a)p850ug1.demon.co.uk (Tony Duell) wrote:
environmental conditions. OTP EPROMS are pretty stabile, however, and
they're VERY small.
I am _not_ going to trust my data to charges stored on the floating gates
of some chip. No way. Even the manufacturers quote data lifetimes of a
few 10s of years at most. That is not archival storage. Nor are EPROMs
particularly robust -- they can be damaged by static, head, misapplied
I like soldered diode arrays. Even if one diode burns
out, one takes a polaroid picture to use as a reference
and solders in another diode. Overlapping of the polaroid
with a negative of the fixed array confirms correct
Oops, sorry, I got carried away. I agree with Tony
that most magnetic media is at least as reliable
if stored in the right environment than a charge
on a floating gate.
This does go back to what I said about using multiple
types of media. It is necessary to use more than one
type. The types should be as varied as current technology
would allow. Also, the multiple copies on any particular
media should also be done on different manufactures
of that same media type.
I was just, barely, able to recover some original data from
distribution disk that were for a Kaypro II because the
adhesive used to hold the pads in the disk, bled through
the pads and got on the disk. This most likely was a problem
with only one manufacture.