The original scsi.device is in the Kickstart ROM and OS3.5 comes with an updated version which is contained in the Devs:AmigaOS ROM Update file. If you don't want to use the updated scsi.device change the SetPatch line in S:Startup-Sequence to read
SetPatch QUIET SKIPROMUPDATES "scsi.device"
Note that you can no longer use harddrives bigger than 4GB if you don't update scsi.device.
Oh, and you have to switch off the computer to remove the ROM Update from memory.
Bye,
Thomas