Re: Disk II Phase Question

[Eric Smith <eric-no-spam-for-me@brouhaha.com>]

"Bryan Parkoff" <nospam@nospam.com> writes:
>     Do each even/odd track have total ($5F00) 24,320 bytes in nibble?  Is it 
> safe to write data to all 70 tracks (even/odd tracks) once, but not more 
> than one time?  Then read data from all 70 tracks to see if data is still 
> valid.  It is very dangerous to read and write all 70 tracks because of 
> overwriting if possible, but it is best to write once while read more than 
> one time for valid data.

No.  The head gap is wider than half of the track pitch.  If you write
track 0, then write track 0.5, you will not necessarily be able to read
track 0 back reliably, though at that point you should be able to read
track 0.5 reliably.

If it was possible to reliably store 70 tracks worth of data on a
Disk II, everyone would have been doing it many years ago.