Re: Platinum 5.25" drive problem

[Stephen Shaw <xstephenx@apple2.org.za>]

Have you tried degaussing the disks by holding them against a strong magnet?
Hold both sides against the magnet. A magnet out of a old car sound system
speaker is ideal they are very strong. Then try initialising the disk.
Formatting is for MSDOS systems!

On Thu, 28 Jun 2001 07:01:02 GMT, Mitchell Spector wrote:

> mjmahon@aol.com (Michael J. Mahon) wrote:
>
>>George Rentovich wrote:
>>
>><snip>
>>>Clamping could be a
>>>problem also. This would be with using  disks with no center hub (IBM HD
>>
>>If he's using HD disks in an Apple 5.25" drive, he has bigger problems than
>>clamping!  HD disks cannot be reliably written to by Apple drives--they don't
>>have enough write current.  (Reading would probably be fine, assuming that
>>they can be written on a suitable drive.)
>>
>>Note, they may _appear_ to format and work for a while, but they will
>>not be reliable over any period of time, if at all.
>
>     Actually it's more serious than that. To the best of my knowledge,
> and from past experience, High-Density 5.25 floppy disks (those with
> a 1.2 MB format capacity on a PC)  are *completely* incompatible
> with a double-density drive. They cannot be format, read or written
> to under any circumstance. If you attempt to use such a disk, you'll
> simply get an endless report of errors and no recoverable data.
>
>     It's a different story with High-Density and Double-Density 3.5
> disks however. They are usable and interchangeable between
> different types of drives by either adding or removing the extra
> notch hole, but I wouldn't recommend it--especially when it
> comes to storing valuable data.
>
> Mitchell Spector
> a_specto@alcor.concordia.ca

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