Re: /dev/hda full - cannot find used space
On Tue, Aug 08, 2006 at 11:20:12AM -0400, Joey Hess wrote:
It's a terribly bad idea to mount the same filesystem twice unless one
of the mounts is forced to be read-only. I'd not even do it then: I like
my data and don't like long fscks.
Just to emphasize: It's *still* a bad idea to mount any journalled
filesystem twice, unless *all* of the mounts are read-only. Even then, I'm
not sure that it's safe.
The problem is that---with ext3 for sure and possibly with the other
journalled filesystems---mounting read-only still does a read-write
recovery of the filesystem from the journal, before doing the actual
read-only mount:
EXT3-fs: INFO: recovery required on readonly filesystem.
EXT3-fs: write access will be enabled during recovery.
On the other hand, Linux might be smart emough to do the equivalent "mount
--bind", rather than mount the same filesystem again. Still, to be on the
safe side, I'd just run the mount --bind command directly:
mount --bind / /mnt/slash
--
Dwayne C. Litzenberger <dlitz@dlitz.net>
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