You guys are going to get a good laugh out of this...
I got desperate and did a little measuring and eyeballing on the index
sensors on my 8" drive, and then took one of my prized DSDD Fujifilm
guaranteed 100% error-free disks, and carefully opened it up and even
more carefully slid the disk out onto a clean sheet of paper. I then
took a 1/4" drill bit and heated the back side till it was almost
red hot and shoved it through the jacket around where the other sensor
was located. Cleaned up the excess plastic with a razor blade and
smoothed everything up and carefully re-inserted the disk. Covered up
the other sensor hole and tried it out. Oops! Hole was about 3/16"
too low. Carefully slide the disk back out and notched the hole out a
bit. Re-assemble disk and tried it again. Ahaa! Drive now sees disc.
Formatted with 22disk using the XER5 SSDD setting and wrote 2 hex files
to it. Shut down PC, hooked everything back up, and miracle of miracles,
the Xerox actually read the files and let me copy them to the hard disk!!
Now all I need to do is get
MLOAD.COM loaded on it so I can combine the
2 hex files (kermit & the Xerox overlay) and theoretically, it should
load and run. But it's been a very long day, and I just now found MLOAD
on my Walnut Creek CD, so something to do tomorrow.
So, the theory is correct, the 2 sensors DO designate between single &
double sided disks... (for future reference) :-)
Dave Land
Land (vintage) Computer Service :-D