I have downloaded Irix 6.5.30 and burnt it with cdrskin -v dev=/dev/sr0 Install.image. Fdisk shows three SGI partitions for the cdrom under Linux but you can not acess them with kpartx -a (does nothing).
I had to replace the CDROM with a DVD because the cdrom was physically broken. It is an SCSI-1 DVD. If I enter the eject command on the console it ejects the dvd. However it does not seem to recognize the inserted cd and its partitions since /dev/drv/dksd4vol is the only visible cdrom device node. There is nothing like /dev/drv/dks0d4s0. The SCSI DVD has some jumpers: ID4,ID2,ID1,PRTY, TERM ON/OFF, 512/2K, TEST, POWER SUPPLY. I have set ID4,PRTY,TERM ON/OFF and tried both positions for 512/2K. I have set the jumpers the same way as for the old cdrom.
To force boot from cdrom I have removed the hard disk but it does not boot. If I press ESC and have the hard disk inserted it boots from hard disk. Too bad that I do not know the root password and that I do not know how to reset it. The screen stays dark until the GUI is fully booted. There is no GUI to select that you want into the PROM console.
I had to replace the CDROM with a DVD because the cdrom was physically broken. It is an SCSI-1 DVD. If I enter the eject command on the console it ejects the dvd. However it does not seem to recognize the inserted cd and its partitions since /dev/drv/dksd4vol is the only visible cdrom device node. There is nothing like /dev/drv/dks0d4s0. The SCSI DVD has some jumpers: ID4,ID2,ID1,PRTY, TERM ON/OFF, 512/2K, TEST, POWER SUPPLY. I have set ID4,PRTY,TERM ON/OFF and tried both positions for 512/2K. I have set the jumpers the same way as for the old cdrom.
To force boot from cdrom I have removed the hard disk but it does not boot. If I press ESC and have the hard disk inserted it boots from hard disk. Too bad that I do not know the root password and that I do not know how to reset it. The screen stays dark until the GUI is fully booted. There is no GUI to select that you want into the PROM console.