Can't boot from either of 2 external Seagate hard drives

Over a year ago, I purchased two external Seagate drives. One is FireWire 800/400. The other is an eSATA 500GB connected to an eSATA PCI card. I have not been able to boot from either one of them after placing a "bootable" copy of my "main" internal hard drive on each using SuperDuper! It isn't a SuperDuper! problem because I have another internal hard drive with two partitions. I have placed the same kind of bootable copy on each of the internal drive's partitions and they boot just fine. The external drives are the problem. After a lot of back and forth with Seagate, they concluded that my boot ROM is too early (too old) and does not support booting from their drives. Their lab has a newer dual PowerMac G5 and it does boot their drives. I was told that updating boot ROM was not possible. Both external drives function very well except for the fact that neither will boot. I just read elsewhere in this forum that boot ROMs _can be updated_. Is this true? Search on "Boot ROM" and include the quotes to see the references to updating boot ROM. Is this possible with my machine? See below for boot ROM version. Thanks in advance for any info you can provide.

Hi-
Blaming the boot ROM is a first. Haven't heard that one before.
Boot ROM can be updated, though it would have to be an update provided by Apple. There are no G5 updates beyond 5.1.8 (that my searches reveal, anyhow).
I think it is best to look elsewhere for the problem....
What are the Seagate series numbers? 7200.10?
What is the Seagate firmware version?
What is the make and model of the SATA PCI controller?
What is the chipset, make and model of the firewire drive housing?

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Can't boot from either of 2 external Seagate hard drives

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