Date   : Sat, 15 Oct 2005 22:09:11 +0100
From   : Tom Seddon <tom@...>
Subject: Re: My New Baby Has Arrived!

Tim Fardell wrote:
> Tim Matthews wrote:
> 
>> and isn't there a notch on the opposite side to the write protect notch
>> too?
>> or is my memory mistaken...
> 
> 
> No, you're thinking of 3.5" disks - they have the extra hole. I have 
> heard tell that you can cut an additional notch in the other side of a 
> 5.25" disk, and make it work either way up in the drive, but I can't 
> understand how that worked unless the drive ignored the index hole as well.

You'd need 2 index holes as well. Then the sectors on the other side 
would just be 180 degrees out. (This would mean you couldn't treat the 
other side as drive 2 on a double-sided drive, because sector 0 of side 
2 would be in the wrong place from that point of view, but it would work 
if you turned the disc around.)

--Tom