Okay, I know that this is way off topic but that we also have some folks who are knowledgeable about SGI here, and I'm at a bit of a dead end. I have been trying for a week to get an Octane at work going. The computer will boot fine to the login screen, but we don't know passwords for any of the user accounts. I understand that there is a "back door" by booting off the install disk and either deleting the password files for the current user account or creating a new user account. I have an external SCSI DVD drive, along with a copy of IRIX 6.4. This is the same version of IRIX installed on the computer. When I boot off the install disk, I get the message "Unable to mount partition: /dev/dsk/dks0d1s0 on /root. This is your system disk: without it we have nothing on which to install software." I'm then prompted to press enter to invoke C shell csh: As I said, the HDDs are fully functional as best as I can tell. The computer will boot to them. There are two drives(80 pin SCSI), and I'm not sure if they're in RAID or simply two separate volumes. I don't think there's a SCSI ID conflict, as the computer will still boot to the OS even with the external drive attached/turned on. Any ideas about where I might be able to go next?