SOME Raid1 is ok here:
"[UU]" - does show you both devices are "U"p and running...
sda, sdb - means you are on 2 SCSI or SATA or "at least not on IDE" drives
BUT
you do have a SOFTWARE RAID1 SME7 running here...
so whatever that "HW" in your questions signifies...
the above may also mean your HardWare is not working!
Regards
Reinhold