On Thu, 7 Jun 2012, Gary Aitken wrote:

When I originally set up my SSD, the stuff I was following indicated there was no need to put anythng on a separate filesystem. I'm now trying to build a backup system on a usb drive and I want a separate /var and /tmp.

I had originally set the nodump flag on /tmp and /var, so my snapshot is empty for those.

There are several things in /var that are worth keeping, and they are pretty small.

I don't think there's any reason to preserve /tmp, but is there any good way to copy /var from the running system on the SSD to another filesystem (and still preserve everything, including flags)? My impression is both mksnap_ffs and dump should only be used on a complete filesystem, not a subtree.

Or do I need to unset the nodump flag on /var, make a snapshot of /, take a dump :-), and then split the /var out upon restore?

Snapshots don't have to be made separately, dump's -L option does that automatically:
http://www.wonkity.com/~wblock/docs/html/backup.html

Restoring from a dumpfile is an easy way. net/rsync has a config option to support flags, but I haven't tried it.

And would it be wise to repartition the SSD to put /var and /tmp on their own partitions?

When I did that recently, I put /var on a small separate partition but used tmpfs(5) for /tmp.
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