can not boot from cdrom/dvd - Printable Version
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+--- Thread: can not boot from cdrom/dvd (/thread-2334.html)
can not boot from cdrom/dvd - estellnb - 07-27-2020
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
Unfortunately automounting is disable so that I can not get any data onto my SGI O2.
RE: can not boot from cdrom/dvd - Raion - 07-27-2020
Use a network install method, or you probably need to fix how you're making the CDs, as it sounds like you aren't making an EFS image. The tarballs on usftp are not for use in making CDs. EFS images must be burnt DAO mode, I know schily tools cdrecord can do it.
RE: can not boot from cdrom/dvd - hamei - 07-28-2020
(07-27-2020, 05:48 PM)estellnb Wrote: I have an SGI O2 and need to reinstall because I do not know the root password.
Too much work. Just get into the prom, then command prompt, then boot -f sash, then change the password file from the command line. Irix uses shadow passwords and I haven't had an O2 for years, so you'll have to search the intertubes for the exact process but much easier than reinstalling.
Or create the proper CD but that's going to be more trouble, perhaps. Although having proper install CD's is a good thing to do, anyhow.