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From: Attila Nagy <bra@fsn.hu>
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Subject: SU+J all files lost after a reboot?
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Hi,

SU+J file systems formatted with r248885. The file systems were in 
active use for some months, they were 70% full.
Today, I rebooted the OS (clean shutdown, there were no crashes) with 
r251643 just to see this:
/dev/da0p2                                923G     32M    923G 0%    /fs

All files lost after a reboot???

But a quick find on the file system showed the files are(?) there, I can 
even read them (at least the ones I've tried so far).
Starting an fsck gives:
# fsck /fs
** /dev/da0p2

USE JOURNAL? [yn] y

** SU+J Recovering /dev/da0p2
Journal timestamp does not match fs mount time
** Skipping journal, falling through to full fsck

** Last Mounted on
** Phase 1 - Check Blocks and Sizes

Now I'm waiting to see what this will do to the data.

I'm somewhat inclined to think that SU+J is not production ready yet...