[estellnb]

I have an SGI O2 and need to reinstall because I do not know the root password. I have downloaded Irix 6.5.30 and burnt it with cdrskin -v dev=/dev/sr0 Install.image. Fdisk under Linux shows three partitions for the cdrom but kpartx does not allow to create device nodes for these partitions.
I had to replace the cdrom with an SCSI-1 dvd because the cdrom was broken. It does not boot from dvd not even when I remove the hard disk or press ESC during boot time. The screen always stays black until the SGI O2 has booted fully. I can eject the dvd drive with the eject command. A device node /dev/drv/dksd4vol is visible but no /dev/drv/dks0d4s0 if I insert the install CD. The SCSI DVD has the following 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. The same jumpers as for the old cdrom that does not work.

> fdisk -l /dev/sr0
Festplatte /dev/sr0: 497,37 MiB, 521519104 Bytes, 254648 Sektoren
Festplattenmodell: DVD RW AD-7700S
Geometrie: 255 Köpfe, 63 Sektoren/Spur, 15 Zylinder
Einheiten: Sektoren von 1 * 2048 = 2048 Bytes
Sektorgröße (logisch/physikalisch): 2048 Bytes / 2048 Bytes
E/A-Größe (minimal/optimal): 2048 Bytes / 2048 Bytes
Festplattenbezeichnungstyp: sgi

Gerät       Anfang   Ende Sektoren Größe Kn Typ             Attr.
/dev/sr0p8   44256 957671   913416  1,8G  5 SGI sysv
/dev/sr0p9       0  44255    44256 86,4M  0 SGI volhdr
/dev/sr0p11      0 957695   957696  1,8G  6 SGI-Datenträger

Partitionstabelleneinträge sind nicht in Festplatten-Reihenfolge.
root:/home/elm/Downloads/Irix-6.5.30> kpartx -a /dev/sr0
root:/home/elm/Downloads/Irix-6.5.30> ls /dev/mapper/
control

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Unfortunately automounting is disable so that I can not get any data onto my SGI O2.