DOC2000 partitiioning question
dwmw2 at infradead.org
Tue Jun 11 04:45:01 EDT 2002
brendan.simon at bigpond.com said:
> HUH ??? If I read this correctly, this means one can NEVER reformat a
> NFTL device with kernel that boots from a DOC (since the driver must
> be built in to the kernel). Is this correct ?
Yes, although in practice you'll get away with it if the NFTL is not in use
at the time and you reboot without starting to use it. In general, you
should be using the M-Systems DFORMAT utility under DOS anyway, rather than
the nftl_format program under Linux.
> This is obviously different for EXT2 and other filesystems, as they
> can be reformatted anytime with the driver module loaded or built in
> to the kernel. Is there a technical reason why NFTL is not the same
You can't mount it in the same way as other file systems because it is not
a normal file system. It doesn't provide a file system to the VFS, it
provides a block device. It's only _like_ a file system.
We could feasibly add an ioctl or some other way to instruct the NFTL code
to 'unmount' and 'remount' an NFTL. It wouldn't be that hard - we have the
code there to deal with modular DiskOnChip drivers being loaded and going
away. Nobody's cared enough to do it, though.
Reformatting the NFTL should be a rare occurrence.
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