[ale] Large floppy format capacities.

[Benjamin Scherrey]

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Ah! Thanx to you and Bao, I now have a better understanding of what this 
whole major/minor business is with devices. I never really understood how 
that applied to anything practical before!

	thanx & later,

		Ben Scherrey

On Monday 11 June 2001 08:07 pm, you wrote:
> More specifically:
>
> By looking in /usr/src/linux/Documentation/devices.txt,
> you see (for example):
>
>    0 = /dev/fd0          Controller 1, drive 1 autodetect
>
> and
>
>    100 = /dev/fd?u1920     3.5"  1920K High Density(1)
>
>
> That means the minor device number for /dev/fd0u1920 is
> the sum of 0 (identifying fd0) + 100 (identifying 'u1920'
> format) = 100.  The major device number for all floppy
> devices is 2.
>
> So, to create /dev/fd0u1920:
>
> mknod /dev/fd0u1920 b 2 100
>
> Afterwards, set appropriate ownership and permission flags.
>
> To echo what Bao C. Ha said, your success with using the
> higher non-standard densities may depend on the quality of
> your drive and your diskettes.
>
> Also, I see that the devices.txt file says that /dev/fd0H1722
> is a deprecated name which is otherwise equivalent to the
> preferred name, /dev/fd0u1722.
>
>
> --Joe
>
>
> -----Original Message-----
> From:	Bao C. Ha [SMTP:baoha at sensoria.com]
> Sent:	Monday, June 11, 2001 6:33 PM
> To:	'Benjamin Scherrey'; 'Atlanta Linux Enthusiasts'
> Subject:	RE: [ale] Large floppy format capacities.
>
>
> The /usr/src/linux/Documentation/devices.txt tells you the
> major and minor of the various floppy devices.  You should
> be able to make one for the correspond formats.
>
> I don't think you can do 1920 consistently, but the 1680
> superformat is stable and widely used.
>
> Bao

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