kernel: FAT: utf8 is not a recommended IO charset for FAT filesystems, filesystem will be case sensitive!

[Evan Monroig]

I noticed that this could lead to problems when you want to rename a
file, for example rename "File" to "file".... you have to rename it
first to another name, like "tmpfile", and then rename "tmpfile" to
"file".

Not very practical, but it goes ^^

Evan

On 6/6/05, ZIYAD A. M. AL-BATLY <zamb at saudi.net.sa> wrote:
> On Sun, 2005-06-05 at 13:23 +0100, Richard Downer wrote:
> > Hello all,
> >
> > Running Ubuntu 5.04 Hoary.
> >
> > I have an external USB hard drive, which contains 2 FAT partitions.
> > When I plug it in, it is detected, and the computer does the necessary
> > magic to mount the partitions, and GNOME puts up icons and explorer
> > windows for the two FAT partitions.
> >
> > However I noticed these error messages in syslog:
> >
> > Jun  5 12:01:57 localhost kernel: FAT: utf8 is not a recommended IO
> > charset for FAT filesystems, filesystem will be case sensitive!
> > Jun  5 12:01:58 localhost kernel: FAT: utf8 is not a recommended IO
> > charset for FAT filesystems, filesystem will be case sensitive!
> >
> > Checking with mount, I see that both partitions have these mount options:
> >
> > type vfat (rw,nosuid,nodev,quiet,uid=1000,gid=1000,umask=077,iocharset=utf8)
> >
> > Sure enough, there is something funny happening with these partitions
> > related to case sensitivity (in particular, rsync seemed to get quite
> > confused when I copied lots of files from a CD-ROM to one of the
> > partitions.)
> >
> > Searching Ubuntu Bugzilla for the "utf8 is not a recommended IO
> > charset" part of the error message reveals nothing....so has anybody
> > else seen this problem, or is it just me? :-(
> > How can I override the iocharset used to mount these partitions?
> >
> > --
> > rd.
> >
> That's normal.  FAT is not a case-sensitive file-system (meaning that
> "FILe" and "fiLe" are the same and could not exists in the same
> directory).  However, using UTF-8 will make it case sensitive (I don't
> know why!) which produce these errors messages in your log.
> 
> Why use UTF-8 in FAT file-systems?  Because it's the only (reasonable)
> way to support file names in other languages (that's, other than
> English).
> 
> You shouldn't worry about it too much.  I get these errors in my logs
> when I mount FAT partitions.
> Ziyad.
> 
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