(sorry if digest delay makes this redundant) I just did an upgrade on a customers I2 and it was like this: SCSI ID 0 X SGI CONTROLLER SCSI ID 1 X BOOT HD >lower right SCSI ID 2 X FDD (SCSI) >upper right SCSI ID 3 X CD-ROM >top middle SCSI ID 4 X EXT HDD SCSI ID 5 SCSI ID 6 SCSI ID 7