floppy disk formatting: how to?

Sam Varshavchik mrsam at courier-mta.com
Thu Sep 24 02:43:04 UTC 2009


Mikkel writes:

> Sam Varshavchik wrote:
>> 
>> I see. But when I look into the actual kernel source:
>> 
>> static struct floppy_struct floppy_type[32] = {
>> ...
>>        { 2880,18,2,80,0,0x1B,0x00,0xCF,0x6C,"H1440" }, /*  7 1.44MB 3.5"  
>> So the actual kernel source matches the man page. The label string here
>> is what the kernel prints when it boots up. That's where, apparently,
>> the device node names came from originally. But, looks like, at some
>> point, for some reason, a different naming convention was adopted and
>> listed in /Documentation, without updating the actual kernel source.
>> And, Fedora's udev setup follows the /Documentation convention, while
>> MAKEDEV follows the actual kernel source.
>> 
> I guess things need to be brought in sync. The file I quoted from
> was for 2006, so the change was made at least that long ago. It is
> the same in the 2009/04/06 version. But I did forget to include this
> comment from the end of the floppy device section:
> 
> NOTE: The letter in the device name (d, q, h or u)
> signifies the type of drive: 5.25" Double Density (d),
> 5.25" Quad Density (q), 5.25" High Density (h) or 3.5"
> (any model, u).	 The use of the capital letters D, H
> and E for the 3.5" models have been deprecated, since
> the drive type is insignificant for these devices.

After some more digging I've came to pretty much the same conclusion. So 
after a few years of general inactivity, I'm going to update floppy with the 
current device names, and I'll see if I can the upstream to update the fd(7) 
man page. But until the updated floppy makes it way into the Fedora branch 
of util-linux-ng, running MAKEDEV is the only workaround.


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