kernel error - how to recover?

[Tuesday]

"Paul Mazzei" <pmazzei@yahoo.com> wrote in message
news:2OydnTyys4BnvrqiU-KYvg@comcast.com...

> During my last reboot I get following message:
> "boot: Cannot open kernel/sparcV9/unix". How do I recover from this if

the

> kernel is corrupt or missing? Sun documentation says 'This error occurs
> when you override the location of the boot -file by explicitly setting it

to

> /kernel/unix" and the solution is to
>
> reset the boot -file in the PROM to " " (blank)
> ensure that the diag-switch is set to off and to true
>
> but I can't find any details on how to do this.
>
> I also found somewhere else where it recommends to boot from the
> installation CD and break out into single-user mode, create a /temp
> directory and mount the the boot drive, but if I try this I get 'read-only
> file system'. Help! :)
>
> Paul
>
>

At the OBP prompt try:

set-default boot-file

Then try rebooting. But if the OBP can't find kernel/sparcv9/unix then you
could have other problems, like the file might be gone.

MasterToyFixer

[Jitender Chugh]

This happens when the system is not able to find the unix file. Please
follow the following steps:-

1. Boot the system and press STOP a to bring the system at prompt
mode.
2 Type boot -single to boot the system in single user mode. After
booting the system in single user mode, check whether particular file
is available or not. If not copy from the alternate location and
reboot the system, system will come up. If you are not able to find
the unix image file from alternate location also then goto step 3.
3. Then follow the different options, if another identical system is
running, type boot -net (Boot from network). If it is not so, give
command boot -cdrom to boot from cdrom, mount it and copy the unix
image.
4. Now reboot the system, system is ready for use.

Still if u face the problem, let me know.

Jitender Chugh

"Tuesday" <no1home@comcast.net> wrote in message news:<rLGVa.9421$cF.3713@rwcrnsc53>...

> "Paul Mazzei" <pmazzei@yahoo.com> wrote in message
> news:2OydnTyys4BnvrqiU-KYvg@comcast.com...

> > During my last reboot I get following message:
> > "boot: Cannot open kernel/sparcV9/unix". How do I recover from this if

> the

> > kernel is corrupt or missing? Sun documentation says 'This error occurs
> > when you override the location of the boot -file by explicitly setting it

> to

> > /kernel/unix" and the solution is to
> >
> > reset the boot -file in the PROM to " " (blank)
> > ensure that the diag-switch is set to off and to true
> >
> > but I can't find any details on how to do this.
> >
> > I also found somewhere else where it recommends to boot from the
> > installation CD and break out into single-user mode, create a /temp
> > directory and mount the the boot drive, but if I try this I get 'read-only
> > file system'. Help! :)
> >
> > Paul
> >
> >

>
> At the OBP prompt try:
>
> set-default boot-file
>
> Then try rebooting. But if the OBP can't find kernel/sparcv9/unix then you
> could have other problems, like the file might be gone.
>
> MasterToyFixer

[ultrasparc3@hotmail.com]

In <2OydnTyys4BnvrqiU-KYvg@comcast.com> "Paul Mazzei" <pmazzei@yahoo.com> writes:

>During my last reboot I get following message:
>"boot: Cannot open kernel/sparcV9/unix". How do I recover from this if the
>kernel is corrupt or missing?

the kernel is not corrupt, the "V" is supposed to be lower-case. you
should be careful about typos if you are going to be a sysadmin.

>Sun documentation says 'This error occurs
>when you override the location of the boot -file by explicitly setting it to
>/kernel/unix" and the solution is to
>reset the boot -file in the PROM to " " (blank)

that does not set the boot-file to a blank, it sets it to the empty
string. the first blank after the opening quote is not part of
the string in Forth.

get yourself to the OpenBoot prompt ("ok" prompt) and type:

set-default boot-file

or just fix the typo:

setenv boot-file kernel/sparcv9/unix