With the Lacie Rugged that I had Zero out Data Erased, I partitioned by GUID into 2 partitions, then I went into Get Info on the drive and unchecked "ignore..." After that I ran SD on the drive (using FW800). I tried to reboot with FW800 and nothing.
I checked the Forum, saw dnanian's suggestion so I ejected and unplugged all FW800 drives and plugged the rugged in directly to the iMac with FW400 ... and nothing on the reboot
Now I am going to Zero out Data Erase the Rugged, partition as APM, uncheck "Ignore...", run SD and see what happens. That would make the drive identical to all properties of the LaCie d2 that I can reboot from.
I'm still open to suggestions...