On Mon, Dec 02 2013, tansta...@libertytrek.org wrote: > Is rsync -a enough for my relatively simple system setup, or would > using any or all of the other options suggested in those threads be > safer/better? Specifically: > > -a, or -axAHX, or -apogXx, or -PvasHAX
I am not an expert but here goes. -x would not hurt but should not be needed since i believe that your current /dev/vg/usr is just one partition. I didn't need -X -A because I don't have acls or extended attributes > or should I go with a combined -apogsvxAHPX ? > > So, here's the plan, please check me... > > 1. Boot off of the latest gentoo LiveDVD > > 2. Mount / and create new /usr directory I am missing something. I would have thought your old / (dev/sda3) already has an empty /usr directory where you previously mounted /dev/vg/usr > mount /dev/sda3 /mnt/gentoo/ > mkdir /mnt/gentoo/usr > > 3. Mount old /usr to be moved/merged > > vgscan > vgchange -a y > mount /dev/vg/usr /mnt/gentoo/oldusr > > 4. Copy /oldusr to /usr This suggests that your current root (dev/sda3) is big enough to include the previous /usr (dev/vg/usr). That is indeed a simple case. Many of us had to move partitions around to get a big enough partition for / + /usr. > rsync -a? /mnt/gentoo/oldusr/ /mnt/gentoo/usr/ > > Are the trailing slashes required/important/necessary? The first trailing slash (oldusr/) is important. Without it, you would be creating the directory /mnt/gentoo/usr/oldusr. With it (as you wrote) just the contents of /oldusr are copied not the directory itself. So yes you want that slash. I don't believe the 2nd trailing / (usr/) is needed, but doesn't hurt. The rsync man page shows both uses and I don't see any words saying anything about the difference. I must say I never noticed the two different uses in the man page can't remember what I used. But again, I believe the results are the same. > Which arguments should I use? Discussed above > 5. Edit /etc/fstab and comment/remove the /usr line > > nano -wc /mnt/gentoo/etc/fstab > > #/dev/vg/usr /usr reiserfs noatime 0 0 > > 6. Unmount mounted filesystems > > umount /mnt/gentoo/oldusr > umount /mnt/gentoo > > 7. Reboot into new system > > Done? > > I'm pretty sure that: > > 1. There is no need to chroot into the real system during this process, > > and > > 2. I only need to mount / and the old /usr, no need to mount anything > else (/proc, /sys, /var, /home, activating swap, etc) > > Correct? Both of these seem correct to me. Good luck! allan
