mount -o union doesn't allow changes to sub directories?
Lawrence Stewart
lastewart at swin.edu.au
Wed Mar 23 06:06:13 UTC 2011
Hi again,
If I run something like:
mount -o union /dev/md0 /etc
where md0 is a memory backed fs device, and /etc is fully populated but
mounted RO off a CD, I can touch a new file in /etc, but can't in any
subdir of etc (fails with "Read-only filesystem" reported).
As far as I can tell this is a bug, but wanted to check if I'm
misunderstanding how the "-o union" mount option is supposed to work.
Cheers,
Lawrence
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