Confusing Boot Problem

[Gingau]

I can choose the SuperDuper clone as a startup disc in Sys Pref or in the Startup Mngr, but the computer still boots up from the the original volume.
(Startup Mngr does pay attention when I choose the TechTool edrive)

I'm running 10.4.11 on a 2.8GHz Intel
Iomega has always been a reliable Mac Hard drive for me.
I don't know what the chip set is.

DriveGenius2 confirms the Iomega HDD is in perfect condition
Renaming the clone the same as the original volume made no difference.


Name : Iomega500
Type : Volume

Disk Identifier : disk1s2
Mount Point : /Volumes/Iomega500
File System : Mac OS Extended (Journaled)
Connection Bus : FireWire
Partition Type : Apple_HFS
Device Tree : /PCI0/RP04@1C,3/FRWR@0/node@303c0540128d02/sbp-2@4008/@0:2
Writable : Yes

Capacity : 465.4 GB (499,763,888,128 Bytes)
Free Space : 215.0 GB (230,897,733,632 Bytes)
Used : 250.4 GB (268,866,154,496 Bytes)
Number of Files : 392,562
Number of Folders : 86,907
Owners Enabled : Yes
Can Turn Owners Off : Yes
Can Repair Permissions : Yes
Can Be Verified : Yes
Can Be Repaired : Yes
Can Be Formatted : Yes
Bootable : Yes
Supports Journaling : Yes
Journaled : Yes
S.M.A.R.T. Status : Not Supported
Disk Number : 1
Partition Number : 2