From: "Frank Haber" 

I have occasion to do this once a year or so.  I find the DSDD 360K
floppies by far the most long-lived of the common formats.  They read even
better on a wide-track 360K drive (still have a couple of those).  And of
the 1.44s, I find more survivors among my 1993 disks than among the ones
from 2000, when the Chinese forgot how to make them.  The jury's still out
on recent ones. Insufficient sample on the odd stuff, like SSSD 8"
(have to go to a friend's to read these).

I recently watched as a kid transferred a tray of 150 360Ks from 1982-87.
There were two sector read errors; the rest of the files were fine.

--- BBBS/NT v4.01 Flag-5