Best way to copy /usr to different partition?

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I was getting dangerously close to running out of disk space
since /usr was filling up fast.

I thought it was simple to tar-copy /usr to a different drive/partiton
using tar copy such as:

(cd /usr; tar cpf - .) | (cd /newpartition; tar xpf -)

I tar copied the contents of /usr into my new drive/partition
and I changed the partition label to /usr, updated my
/etc/fstab file, renamed my /usr to /usr-b, created
an empty directory /usr, chmod it to 775, mounted
/usr - and it all looked fine.  I then unmounted /usr,
and then rebooted.

The reboot reported that there was a problem with
the two library files: somelibfile.so.1 and somelibfile.so.2
and then gnome came up with user/password screen.

I logged in as a normal user, and after that point, I a
black screen came up with the gnome-X-cursor and
then stopped.  Nothing worked at this point.

I then rebooted using rescue CD, and examined the
messages log file and it appears that selinux reported
all sorts of AVC denied over /usr and other non-system
mounted filesystems.

Clearly, it seems that selinux is having problems.

I suppose I can reboot setting the selinux = 0 and then
begin the task of somehow repairing selinux tags in all
of my files?  Does this make any sense?

Anyone have a better solution?

I could reverse the /usr process and get rename /usr-b
and comment out the /usr from my fstab, but I wanted
some input from member in this forum before attempting
to do that - I would end up back to my original disk-space
problem.

Any advice?




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