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Re: Using both sides of DS DD disks





Simon Williams wrote:
On Sun, 03 Nov 2002 14:49:04 GMT Greg Weston <gwestonREMOVE@CAPSattbi.com> wrote:


In article <Q8idnZ5QxY6KNlygXTWc2Q@comcast.com>, RED
<redodd@comcast.net> wrote:


Double sided drives write to both sides with no problems. Some people say
that because the disk spins in the opposite direction when you flip it, dust
and dirt that was caught by the internal lining of the disk jacket can cause
harm to the disk.  I've used flippies for eons and never had any problems.

You know, I only ever had one problem with flipping a disk over and it
was weirdly consistent. Ultima III. The program itself was on one side
of the disk and the other side was a data store that contained all the
structures that would be modified over the course of the game. So the
first thing you had to do was copy that second side onto a writeable
disk. I had three consecutive copies of Ultima 3 fail to launch _after_
I made that copy, even though all worked fine before.



I've had a similar problem with half a dozen copies of Multiscribe...
in each case after trying to copy (using C2+ 7) the original no longer
functions. Side one boots as expected, but after flipping the disk at
the appropriate time, the program keeps asking for side 2...

Oh well...

Am I correct in assuming that DSDD disks were originally intended to be
used on one side or the other (depending on your computer model) rather
than both???

DSDD disk weren't "flipped" on DSDD drives. DS drives have two heads and the disk spins between them SS drives, like the Disk II have a head and some kind of pressure pad to keep the disk close enough to the head to be read (like a cassette tape has.) So a DS drive reads either side of disk by knowing which head to read with. A SS drive requires you to extract, flip, and reinsert inorder to read what, to the drive is, basically a different disk.

Does that help?

Roy


SW



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