Hi,

I'm from a software background and so dont often get into this HW install stuff, so I need some guidence.....

I've got an Ultra 30 which I need to build, but it has no CDROM so I'm installing a standard Tosh scsi 40x.

At OK prompt, probe-scsi finds it on Target 3, but "boot cdrom" doesnt find a boot file and complains device not ready. I'm assuming this is because the std cdrom alias is for target 6? I've tried variations on boot but to no avail.

Any clues?

Hi mate, if the cdrom alias is for target 6, then I guess you can either try to change the target number of the drive by the jumpers/pins on the back of it, or you could use the openboot commands to create an alias...

at ok prompt:

show-devs

will show you devices .. basically look for your cdrom drive device + target on there and use devalias to create the alias for it.

it's prob set to:

/iommu/sbus/espdma@f,400000,esp@f,800000/sd@6,0:d

you could do

devailias mycdrom /iommu/sbus/espdma@f,400000,esp@f,800000/sd@3,0:d

and type boot mycdrom - however devalias is only a temporary thing and will be erased upon reboot or powerdown. you can use nvalias instead for a permanent setting. (if you can't change the scsi target ID then just change the cdrom alias as necessary)..

Hope this helps.

Hi there,

Thanks, I've sussed it now, and have changed the alias.

Thanks for the help.

One question though, the disk@3,0:f is part of the parameter I used boot from CDROM, but you've mentioned disk:3,0:d

I know the a,b,c,d,e,f bits relate to something about the segments on the CDROM, but can you explain what the importance of this is? Why wouldnt it boot using a?

Cheers,

Glenn

Hi,

I can't quite recall exactly what these letters mean but yeah, it was a case of you adapting the command to your system. Glad it helped. :o)Haven't had to do that sort of stuff for a while so it was a nice memory refrsher for me too!

I'll take a look through my notes and see if I can find out what it means... unless someone on here can enlighten us? Will post a reply if I find it.

If you're interested you might wanna read
http://www.sun.com/blueprints/0301/BuildBoot.pdf