LH3000 won't POST after replacing SCSI drives

[Greg McCauley]

I have a Netserver LH3000 U3 that had two 9.1gb SCSI drives in a RAID-1 on the embedded RAID controller. I tried replacing those two drives with two Seagate 36.7gb SCSI drives (ST336754LW), but the server hangs in the POST process right after identifying the second RAID controller.
There are jumpers on the HP 9.1gb drives for SE MODE and AUTO START DELAY and one jumper is across the the top pins of ID BIT 3 and ID BIT 2, so I'm guessing that one does nothing.
There is a jumper block on the bottom of the Seagate drive for setting the SE and DELAY MOTOR START settings, but this jumper block is smaller than the jumper block on the HP drive.