SUMMARY: Sun Ultra-5 will not boot from CD-ROM

Laurence Carradus laurence.carradus at blackpool.gov.uk
Tue Nov 27 04:53:20 EST 2001


Many thanks for the swift and helpful replies,
 it appears that installing the SCSI card for the external tape has screwed
up devaliases, but the system will boot from the internal IDE CDROM if I use
the full device path "/pci at 1f,0/pci at 1,1/ide at 3/cdrom at 2,0:f". 

Particular thanks to the following...

Peter Stokes:-  1) What SCSI controller do you have?

2) At the ok prompt whet do you get when you issue probe-scsi-all command

3) If you do disconnect all of the SCSI devices does it boot ok to single
user (boot cdrom -s)?
...................................................
Paul Richards:-  This command is attempting to boot from a scsi cdrom,
the ultra 5's cdrom is IDE. Is this because you have an 
external scsi cdrom? If not then you will need to correct the 
device alias for the cdrom drive.

Mine is /pci at 1f,0/pci at 1,1/ide at 3/cdrom at 3,0:f

you might have to change the cdrom at 3 number to match 
your drive, as I have moved mine to the secondary 
controller. 
...........................................................
Joe ( unixadmin ):- Do you have the right path set for the cdrom?

what is the output of probe-scsi-all and devalias?

make sure that the machine knows the correct path to
the cdrom drive.
............................................................
Greg Ulyatt:-  The last time I checked, Ultra-5's were IDE, so I'm guessing
the SCSI
card
is a PCI option? If so, then the internal CD is IDE (for sure, unless
you installed
a scsi one in place of the default) then your boot path may have been
changed
so as not to scan the IDE bus for boot devices.  If you know the device
path
you could try to boot directly off the CD device (again, assuming it's
the internal
IDE disk!). You could try:

boot /devices/pci at 1f,0/pci at 1,1/ide at 3/sd at 2,0:a

However, if your cd is scsi&on the bus, it should be ID 6 - the normal
boot
id for CD's on Sun hardware.
.......................................................

Thanks again, ( all I've got to do now is reset the partition table, restore
3 file systems and hope the whole thing will still work !!! There's always a
first time for everything )

Laurence

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