After upgrading to 1.6L (from 1.6 stable.  The userland was not
upgraded, and MP support was added), I have got the following
error in my daily output:

iostat: sysctl hw.diskstats failed: Invalid argument
iostat: sysctl hw.diskstats failed: Invalid argument

I noted that there was one other item in the mailing list on this
subject, and it mentioned something about /etc/security not
picking up any drives (?).  I currently have 3, two of which are
mounted.
-- 
D. E. Evans
<sinuhe@xmission.com>
<http://www.xmission.com/~sinuhe>