about HighPoint RocketRAID 1820a (hptmv) and freebsd 5.3

[Andrea Riela]

Uops ... it doesn't work great :(

I've a raid 1 between disk n.1 and disk n.3.
When I try to disconnect and reconnect disk n.3, the array is critical, 
but when I try to rebuild that with:

sysctl -w hptmv.status="hpt 0 rebuild 1,1"

I receive always the same error:

sysctl: hptmv.status: invalid argument

well, what I've to do?
Thanks for any suggestion
Regards
Andrea