Repeated /dev/vg00/lvol3 -> /dev/root

[Nico van Royen]

The boot string gives me the (according to ioscan) /dev/dsk/c2t5d0 disk:
--
boot_string:
boot_string: disc(10/8.5.0:0)/stand/vmunix
--

the lifcp info on both disks are indeed the 'hpux -lq'.

- Nico

[Clemens van Everdingen]

Hi Nico,

That seems to be fine.
Still wondering:

What could cause a running system to switch

/dev/vg00/lvol3 mounted on /
change to

/dev/root mounted on /

So what happend just before the change ?

C.

[Clemens van Everdingen]

Nico,

can you do a stings lvmtab ?

Is /dev/root in there ?

C.

[Nico van Royen]

What happened during the change.. well.. good question. The change to /dev/root happens on (appearent) random time.. sometimes during day time operation, sometimes at night.
Durin an earlier investigation several months back I had put every service, daemon or process on debug or verbose logging to syslog.
On some of the occasions I saw sendmail mailing a mail to root, which by /etc/mail/aliases is forwarded to a central mail server at the same second the change to /dev/root occured. But then again.. the change to /dev/root also has happened without this.


The lvmtab is also the same (in contents and in filesize) as for the attempt with suggestions made before this weekend. Its full unedited contents is:
# strings /etc/lvmtab
/dev/vgaspkg04sw
/dev/dsk/c1t3d0
/dev/dsk/c2t13d0
/dev/vgaspkg04db
/dev/dsk/c1t4d0
/dev/dsk/c2t14d0
/dev/vgnuispkg02
/dev/dsk/c1t12d0
/dev/dsk/c2t2d0
/dev/vgaspkg03sw
/dev/dsk/c1t13d0
/dev/dsk/c2t3d0
/dev/vgaspkg03db
/dev/dsk/c1t14d0
/dev/dsk/c2t4d0
/dev/vg00
/dev/dsk/c1t15d0
/dev/dsk/c2t5d0
#

- Nico

[Clemens van Everdingen]

Nico,

If the problem occurs, is the /dev/root line also in /etc/fstab ?

C.

[Nico van Royen]

Clements,

No.. the /dev/root entry only appears inside the /etc/mnttab and bdf / df output.

- Nico

[Clemens van Everdingen]

Hi,

One last suggestion !
I guess that the maount command is needed to get /dev/root in bdf output !

If so, you could write some script around mount command to get something logged to syslog.

Since I am no script kiddie, I would not directly know how to do this.

Also, might be a suggestion to log a call to HP !

Ik heb geen idee meer !

Groeten
Clemens

[Nico van Royen]

We'll see what HP's answer will be.
There initial answer was the old 'trick' to remove mnttab followed by an mount -a wich appearently doesn't work in this case.

If they find any solution, I'll be sure to post it here.
Thanks again for all suggestions, tips and cooperation.

- Nico

[Nico van Royen]

Solution found:

I would post again a message in here when my problem with /dev/root was fixed.
After several attempt from HP's support desk, it turned out that the patch PHCO_25640 (a libc patch) was able to fix the problem.

The system is running now for 2 weeks and no problems again with the /dev/root entry.