can not boot from dvd

estellnb

New member
Jul 27, 2020
3
0
1
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.
 

estellnb

New member
Jul 27, 2020
3
0
1
I need to reinstall since I do not know the root password. However installing via network seems to be no option because of security.
> 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
 

estellnb

New member
Jul 27, 2020
3
0
1
Unfortunately automounting seems disabled so that I can not get any data onto that machine. Is there any way to see if the dvd drive works when I log into the guest account?
 

Elf

Storybook
Feb 4, 2019
303
68
28
installing via network seems to be no option because of security
This part puzzles me a bit; it is quite possible there is some PROM option you can enable to require a password for getting to the prompt, but at least I have not encountered that before. The network option is what I would suggest, and there are a few experts here (e.g. @Unxmaal )
 

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