Adding 'special devices' to an existing RAID1

[Olivier Cherrier]

        Hi,

Is there a way (without backup/restore) to add a 'special device' to an
existing softraid RAID1 array?

For instance:


$ sudo bioctl -ih sd4
Volume      Status               Size Device
softraid0 1 Online              39.0M sd4     RAID1
          0 Online              39.0M 1:0.0   noencl <sd2d>
          1 Online              39.0M 1:1.0   noencl <sd2e>
$ 
$ sudo disklabel sd2c | grep RAID
a:        419441021               64    RAID
d:            80325        419441085    RAID
e:            80325        419521410    RAID
f:            80325        419601735    RAID
$ 
$ # Here I would like to add /dev/sd2f as a third device in the RAID1 set
$ sudo bioctl -R /dev/sd2f sd4
softraid0: volume not degraded
$ 


Thanks,
Olivier.