If you always want to boot from the Maxtor, you could add the following lines to the beginning of your startup-sequence:
assign >nil: sdh0: exists
if warn
reboot
endif
SDH0 is the name of one of the partitions on the Seagate. The Reboot command is on the Install disk. Certainly this will give you a loop if you remove the Seagate or if it has other troubles.
You could also try to swap the drives, or try different SCSI IDs (e.g. give the Maxtor a higher one than the Seagate).
Or look if the Seagate has a "boot delay" jumper which has to be removed (if it is a "disable boot delay" jumpper, it has to be set of course).
Bye,
Thomas
