Commands to show TDEV/DATADEV relationships

Is there any way to do either or both of the following:

1)  Given a TDEV, which DATADEVs are being used?

2)  Given a DATADEV, which TDEVs are using it?

I've got eight physical SATA disks that are "hot" right now.  The only thing they have in common are 22 RAID-6 data devices.  I'm trying to figure out what's responsible, and I'm not getting anywhere.  There's only one device on the entire frame that is noticeablybusy, but it belongs to an FC pool, so it shouldn't be on SATA.  I'm wondering if FAST/VP could have moved it to SATA at some point and it hasn't been moved back to FC yet.  Anyone have any ideas?