[SPARCbook] CD-ROM on a 3gx

[Thomas Roehr]

Federico,

On my 3GX, (and under solaris) the cdrom is at /dev/sr0, which is a symbolic
link to /dev/dsk/c0t6d0s2. Boot cdrom should suffice. Are you sure you have a
cdrom that is supported as bootable? Check the sector size on the cdrom and
ensure it is at 512 bytes per sector, not 2048 bytes.

Tom Roehr
troehr at nj-onramp.com

Federico Lucifredi wrote:

> Hugo wrote:
>
> >Take a look at the proper information:
> >http://www.solariscentral.org/
> >
> >Here you will find a CD-ROM document that shoudl explain it all.
>
> ... and ....
>
> >To boot from an external SCSI CD-ROM the SUN CD-ROM FAQ is the proper
> >document to read.
> >
> >http://saturn.tlug.org/suncdfaq/
>
> I knew the second one already - and it does not help.... enough. I did some
> progress today, though.
>
> I verified from the second FAQ that, as I recalled, under solaris 2.5.1 the
> CD-ROM has to be on SCSI-ID 6. And there it is. However, it does not get
> recognized by the procedure
>
> touch /reconfigure
> reboot
>
> nor does boot -r help. My CD drive at ID 6 has no /dev/rdsk or /dev/rdsk
> device files (how do you call these in solaris ?), in spite of it testing
> positively to a probe-scsi at the prom (answers at /dev/dsk/c0t6d0s0 (PD
> drive) and /dev/dsk/c0t6d0s1 (CD-ROM).
>
> Today's progress : I tested the prom and although a printenv has a variable
> "boot devices" (or something similar - can't remember ) that lists only net
> and floppy, the command "boot cdrom" is accepted - but it goes on to
> c0t6d0s0 - the PD drive. When i issue a "boot
> /iommu/sbus/espdma at 4,8400000/esp at 4,8800000/sd at 6,1:d /kernel/unix" I see the
> drive light seeking, until it tells me that there is no /kernel/unix file on
> that Cd, which is actually true =)
>
> So - I have two questions:
>
> 1) what does the "d" at the end of boot
> "/iommu/sbus/espdma at 4,8400000/esp at 4,8800000/sd at 6,1:d" mean ? I copied the
> string from what the "boot cdom" command issues and only changed "...6,0:d"
> to "6,1:d", but while I understand the rest of the string somewhat, I wonder
> about that last letter (I also saw a "c" on an example found on the net).
>
> 2) I would like to know how to modify the prom command "boot cdrom' so that
> it boots with my modified string above instead of the wrong one currently in
> memory. I could not find sufficient information on how to do this (in fact,
> I do not understand where the cdrom value is, since it does not seem to be
> showing under printenv....).
>
> 3) MOST IMPORTANTLY, I need a tip on how to get the darn device files
> created, since I do not know how to mount
> "/iommu/sbus/espdma at 4,8400000/esp at 4,8800000/sd at 6,1:d" -- which would be the
> solution to my chief problem.
>
> Thanks for your help!!
>
>     Federico
> _________________________________________
> -- "'Problem' is a bleak word for challenge" - Richard Fish
>
> Muad'Dib of Caladan (Federico L. Lucifredi)- flucifredi at acm.org,
> http://www.lucifredi.com
>
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