Every few years, something happens and Hammer’s snapshotting saves me.  Last week, this host had a power outage and MySQL managed to mangle the WordPress database for this site.  Fixing it needed only:

1. cd /var/hammer
2. cd var/[date of last good snapshot]/db/mysql
3. cpdup -VV -v . /var/db/mysql

I am writing this down in part because I am sure I’ll need it again in a few years.