Re: /dev/fd0 is not a valid block device

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Rick Stevens wrote:

Jeff Vian wrote:



James Kosin wrote:

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Rick Stevens wrote:
<<-- snip -->>

If you use fdformat to format the floppy in Linux, you still need to use
mkfs to build a file system on the floppy. Otherwise, you will still
get this error, even after the format.


/dev/fd0 is only permitted if fdformat knows the format already or can
find it out from the floppy.

You can use mount /mnt/floppy to try again. Or better still, get a disk
you know is good... and try mounting that.


If you use "/sbin/mkdosfs /dev/fd0" it will format the floppy as a dos filesystem and check the lowlevel format at the same time. Use of "/bin/fdformat" does the lowlevel format only and from the man page it does require the use of "/dev/fd0H1440" or equivalent in order to know how to do that format.

However, if that disk has been used for some things (like making a linux boot disk) it cannot be reformatted using mkdosfs and would have to be reformatted with fdformat first.

Bottom line - to do the low level format use fdformat, -- to make the usable format use mkdosfs.


"mformat a:" will also do a vfat format of a floppy.

right, among others. mkfs < optios> mkfs.msdos <blah> etc.

The wonders of having 100 ways to do the same thing :-)




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