Re: HD 5 1/4 disks on Apple //?

["Bryan Parkoff" <bryan.nospam.parkoff@nospam.com>]

    It is true that DSHD does not have black, brown, tan, or white ring in
the center of each disk.  The sticker or glue between DSDD's disk and ring
was too dry because of age.  I was able to remove ring from the DSDD before
I inserted DSDD disk into the Disk II Drive.  No damage.
    I could be able to boot and format DSDD's disk without ring.  I tried to
put ring on DSHD's disk.  I can be able to boot and format on PC drive, but
I can't do on Disk II Drive.  I can say why because DSDD and DSHD have
different magentic field that causes Disk II Drive to not recognize the
magnetic field.  I have no idea why.  Would you expect PC's old 360K drive
to boot and format DSHD's disk?  I am sure that you answer no.  It is the
same example for Disk II Drive that looks like 160K / 180K, but it remains
at 140K.

-- 
Bryan Parkoff
"Geo3" <grent@comcast.net> wrote in message
b66becf.0312261839.185ab406@posting.google.com">news:b66becf.0312261839.185ab406@posting.google.com...
> "John" <bargainboy@charter.net> wrote in message
news:<vupfsessil0697@corp.supernews.com>...
> > The DSDD 5.25" disks have a lower magnetic field strength than the DSHD
> > disks.  Therefore, the programs you save on the DSHD may not be there
later
> > when you want them.  Also, the reverse is true if you use DSDD disks in
> > place of DSHD disks.  This same info is true for the 3.5" disks as well.
> > Hope this helps.
> >
> > John
> >
> >
> > "lockar" <nospam@spam.com> wrote in message
> > 261220031157407664%nospam@spam.com">news:261220031157407664%nospam@spam.com...
> > >
> > >      How iffy is it to use High Density 5 1/4 disks on the Apple //?
I
> > > am having a problem finding DSDD disks on the net at a good price.
But
> > > I can find DSHD 5 1/4 disks cheap on the net.
> > >
> > >     I know using HD 3 1/2 disks is realy iffy because of the magnetic
> > > fields on HD disks are lower then those of DD disks (or is that the
> > > other way around?)
> > >
> > >     -Lockar
> Hi,
>  I just wanted to add that there is no center metal hub on the DSHD
> 5.25 disks. Apple drives have a hard time clamping on just the media.
> Some third party drives are able to clamp on it. When trying to read
> these disks formatted on third party drives on apple drives it
> sometimes does not work so well.
>     Take Care,
>          George from Michigan