reiserfs mount fails for read-only devices about util-linux HOT 2 CLOSED

On Mon, Sep 10, 2012 at 06:46:55AM -0700, Martin Pitt wrote:

You cannot mount read-only devices such as write protected SD cards,
CD-ROMs, etc. with reiserfs. This is currently being detected by the
udisks2 test suite which tries to do fs creation and mounting for
r/w and r/o devices.

I guess it's because filesystems like XFS or Reiser want to touch
filesystem journal during mount(2) to save some info there. It's
probably not designed by default for strictly read-only devices.

BTW, you can also set read-only arbitrary device by blockdev --setro .

Karel

Karel Zak [email protected]
http://karelzak.blogspot.com

from util-linux.

Karel Zak [2012-09-11 2:15 -0700]:

I guess it's because filesystems like XFS or Reiser want to touch
filesystem journal during mount(2) to save some info there. It's
probably not designed by default for strictly read-only devices.

Indeed. So I'll close this issue as well, as util-linux can't do
anything about it.

BTW, you can also set read-only arbitrary device by blockdev --setro .

And another thing I didn't know, thanks! That's indeed much easier
than having to do the ptype/add_host dance.

Martin Pitt | http://www.piware.de
Ubuntu Developer (www.ubuntu.com) | Debian Developer (www.debian.org)

from util-linux.