Re: fedora core 4: no fd0u1680?

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On Sat, 2006-09-30 at 00:23 -0400, fedoralist@xxxxxxxxxxxxxxx wrote:
> Jeff Vian wrote:
> > On Fri, 2006-09-29 at 17:24 -0400, fedoralist@xxxxxxxxxxxxxxx wrote:
> > 
> >>Joe Smith wrote:
> >>
> >>>fedoralist@xxxxxxxxxxxxxxx wrote:
> >>>
> >>>
> >>>>I've been using core 4 for quite some time now and this is the first 
> >>>>time i've had to think about device nodes. I'd like to mount a floppy 
> >>>>that's formatted to 1680 density but can't figure out how the device 
> >>>>nodes work. ...
> >>>
> >>>
> >>>I hate to ask, but did you try it? The fd0...fdn devices are supposed to 
> >>>auto-detect the actual capacity and density of the disk in the drive.
> >>
> >>Yup. After reading the udev stuff.
> >>
> >>[root@apollo ~]# mount -t vfat /dev/fd0 /media/floppy/
> >>[root@apollo ~]# ls /media/floppy/
> >>?.?           8v??.??       fp??????.?1?  ??syslin.ux   ???.u??
> >>????????.???  }???.?b?      f?>?tf??.t??  ????????.?t?  ???}????.u}?
> >>?.??>         ??b?6?t?.???  f!?txf?.?     ???????.t?=   ???????u
> >>?<??@???.???  b??????u.???  ???h.???      ?????!?t.?aq  u????u?.???
> >>???.???       ??cbt.^?f     ?>lu.?hu      &?tf??4u.?.?  _w??p??.??_
> >>??.???        dlinux s.ys?  pamsu7f?.>du   ?t??< v.?n?
> >>0uf???8u.f)?  f??bss.???    p??s??.???    t??x?.??x
> >>
> > 
> > The 1680 density is NOT a dos/vfat format.  IIRC that is a MAC format
> > and needs to be mounted as such for proper access.
> > 
> > 
> Not true. In fact, Microsoft used to use 1680 density for its install 
> disks. I've no idea if it was ever used for Macs, though. In any case, 
> it mounts fine on core 3 with -t vfat.
I dimly remember that Win95 (the last version that did a floppy install)
had higher than standard density diskettes for the install.  I never did
know exactly what density it was, and the floppy install for windows
disappeared after that use.

> The example i posted above was to show that the disk was not 
> automagically detected by udev as 1680. That is what i would expect to 
> see on my core 3 box if i used /dev/fd0 (because it's the wrong density).
> core 3:
> [root@poseidon ~]# mount -t vfat /dev/fd0u1680 /media/floppy/
> works fine.
> core 4:
> [root@apollo ~]# mount -t vfat /dev/fd0u1680 /media/floppy/
> mount: special device /dev/fd0u1680 does not exist
With Core 3 and earlier all the possible device types were created
in /dev.  In later releases they saw fit to remove them and they now
have udev and hal to do the automatic configuration for you.

I bet if there was a rule for udev to create the device you could get it
to mount under FC4 & FC5.

Alternatively, if you know the specific characteristics of the device
you could use mknod to create it manually.

> b

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