Hi,
Given the quality of this controller (SiL is a bit *too* cheap maybe),
and the limited support for it (ataraid(4) can only read metadata from
it), you might want to consider using GEOM to mirror your disks instead
(and use the controller as a plain IDE/ATA controller):
I have this ultra ata IDE controller card that I try to use with RAID1,
Both the harddrives I intend to use, ad6 ad4 are working, fsck gives no
errors and I can read/write on them.
I have setup raid1 on these in the bios utility for the ata controller card.
but now It says one of them is down!