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Old 05-22-2010, 11:33 PM
Ben Hutchings
Default Bug#581695: mount manpage should mention ntfs read-only

On Sat, 2010-05-22 at 20:26 +0800, jidanni@jidanni.org wrote:
> There ought to be
> 1) mention on the mount man page that there is something funny about
> NTFS "rw". Or better:

Firstly, the mount man page is not provided by this package. Second, if
you install ntfs-3g mount will automatically call its mount.ntfs command
which provides full read-write support. I suggest you file a wishlist
bug on the mount package to document this requirement.

> 2) a mount STDERR message "mounting Read-only, as Read-write is not
> implemented yet", just like the "write protection" warnings sometimes
> seen on other mounts. Or
> 3) Implement RW mounts.
> Anyway, there should be at least a dmesg message, and mount(8) should
> list it as ro, not rw!

This would not be true, as the kernel ntfs implementation does have some
support for writing to files. We enable CONFIG_NTFS_RW, which is
described thus:

This enables the partial, but safe, write support in the NTFS driver.

The only supported operation is overwriting existing files, without
changing the file length. No file or directory creation, deletion or
renaming is possible. Note only non-resident files can be written to
so you may find that some very small files (<500 bytes or so) cannot
be written to.

I admit that this is not very useful, and it might be better just to
disable this.


Ben Hutchings
Once a job is fouled up, anything done to improve it makes it worse.

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