Creating vinum RAID 1 on place

[Olivier Nicole]

Hi,

Is there a trick on the way to build a vinum RAID 1 without backup-in
the data first?

I have the two disk that will get mirrored. One of the disk if
formated as UFS 4.2 and already holds all the data. The second disk is
blank.

NormallyI should start with 2 blank disks, label them as vinum, create
the vinum plex, then push the data on that RAID. Is there a way to do
it without blanking both disk first (a RAID 0 on a single disk, copy
the data on the RAID 0), label the other disk as vinum and create a
RAID1?

best regards,

Olivier