No subject

"The data section of the filesystem is divided into _value_ allocation
groups (default value is scaled automatically based on the underlying
device size)."

It's not stated in man but the minimum is 4 AGs, unless that has changed
in the last couple of years.  This is what I was referring to previously
when I stated 4 AGs is the default.

What you likely did was format a 2TB device and saw 16 AGs due to the
automatic scaling, then shortly thereafter formatted a much smaller
device and saw the default minimum 4 AGs.  Assuming agcount was
statically defined, you assumed the default value had been decreased.

-- 
Stan