I have a laptop wit a fossil partion which is not backed by venti. Yesterday I scrambled my display and had to reboot without shutting things down nicely. That fossil was not my root, but I believe it was running, with "main" open.
Today, running 'fossil/fossil -f /dev/sdC0/fossil' gives: cacheLocalData: addr=757 type got 8 exp 8: tag got 53ed9b6c exp 71875e60 fsOpen error fsys main open -V -c 750: fsOpen: fileRoot: block label mismatch and then some follow-on errors from commands trying to do things with "fsys main". fossil/flchk gives similar results (the first line is identical). Is it possible to recover this fs? Aside: this comes less than a week after the HD in my MacBook gave up the ghost. Not a good week for storage.