Help! D370 can't boot

[Edward Chang]

I can't boot my D370 (HP9000).
Yesterday, I found the root filesystem was full.
so I cleaned up some temp file and unused file.
Then I reboot it, but it couldn't reboot. the
boot message is as follows:
-------------------------------------------
..........................................
Syetem Panic
9245xB HP-UX(B.10.20) #1: date
panic: (display==0xb800, flags==0x0) Date page fault.
It was not possible for the kernal to find a process
that caused crash.

Dumpsys() called

Attempting to dump 134217728 bytes of memory to disk
device 0x1f005000
Disk write: mem addr 0x0, disk addr 0xb2d8000. count 1048576
.....
.....
------------------------------------------------------
I also want to try boot from CDROM, but is said "
Initialize failed, errno = -4" It means I can't
reinstall HP-UX on D370.
I replaced the root disk with the one from another D370,
it can boot. Does it mean my root disk was damaged?
Is there any one who has encountered the same problem?
Pls help, Pls kindly write to me:scip7164@263.net
Any suggestion and solution are appreciated.
Thanks in advance.

[Patrick Wessel · Accepted solution]

There are multiple reasons for a data page fault. It is not easy to find the root cause without analyzing the dump. But I don't think that your root disk is damaged.
The entry init = -4 is the exit status of the IODC (IO dependent code). It means that there was a serious problem that prevents the system from booting. Possible causes for that is:
- wrong boot path
- unbootable CD
- defect CD drive

Have you tried to boot the backup kernel? (I hope you have one). And another question, have you tried to boot in any other mode than multi user (single user).

[Edward Chang]

thx, Patrick
yeah, I tried boot the backup kernal, in ISL> prompt, I key in
"hpux -is /stand/vmunix.prev" , als tried
" hpux -is ", and "hpux -lm",
"lsa=hpux(52.6.0;0) /stand/umunix ;
hpux -lm /stand/vmunix.prev " but all failed
coulndn't boot into shell. and always got
"System Panic ....."

[Patrick Wessel]

Does it take an unusual long time to boot before it panics? I mean, was a normal boot faster (at the time the system was still able to boot). Do you see a Chassis code on the LCD before the system panics? Just to get an idea what the system is doing at the point when the system panics.

[Eddie Warren]

Hi Edward,
There are a couple of things you can try. First if you system is unbootable it depends on how far into the boot process it goes before you fail. It seems strange that you are unable to boot the "core O/S" cdrom.

On the boot process did you halt it and try to boot single user, "HP-UX -is". It might be your /stand/vmunix file might be corrupt, or changes where made in the kernel the system cannot resolve. If this is the case try booting off your /stand/vmunix.prev file. Once you get it up in the single user mode, do a "mount -a" and see if all your mount points are there. It's at this point you will see any full file systems.

If all the above fails. Interupt the boot process and do a "sea ipl" to search for bootable media on the busses. If your CD is bootable you will see it displayed. If it is displayed try and boot it into a recovery shell. Good luck and let me know if I can help any further.

[Edward Chang]

Hi, everyone,
I replaced the CDROM drive whth a new one.
and reinstalled OS. Originally, I want to
use "import" in SAM to restore the VG info,
but only 2 VG could be restored, so I had to
use "pvcreat -f" to recreat new VG. The old
drive also could be used after being cleaned.
thx

[R D SUNDAR RAJAN]

can you do hpux ll at the ISL> prompt you can see the directory listing of stand .If luck favours you may have a bootable kernel there .Try booting from that kernel.