Downloaded and ran the utility for the DriveStation Quattro you recommended but I get the same error I had gotten before.
"Couldn't find HD-QSU2/5 series."
OS X 10.5.6
Connected via USB
Tried with Drive formatted to FAT32, NTFS and Mac OS Extended Journaled.
Other than the raid utility the drive connects, mounts and operates fine on a Mac.
Please help.