topic Re: please advise in Operating System - HP-UX

please advise

Kim wing — Thu, 05 Jun 2003 03:51:46 GMT

Hi,

Since I'm novice in HP-UX, I need some advice, I have 2GB of physical memory and my hp-ux 11.0 keep crashing constantly. I have made some changes to the /etc/rc.config.d/savecrash as attached for your review?
Because my /var file system does not have enough space, 1.can I sometimes move the crash files to another directory and then change to that directory just to run the Q4?
2. After changing the savecrash, can I run savecrash -vr to recreate the dump while the users are on the system?

Points will be assigned.
Thanking you in advance.

Re: please advise

Rajesh G. Ghone — Thu, 05 Jun 2003 04:01:48 GMT

Hi Kim,

You can change the path of crash dump if you feel that you dont have enough space in /var.
You can edit /etc/rc.config.d/savecrash file& change the path where you feel you have more space.& yes you can run savecrash -rv or you can give savecrash -t to directly redirct it to tape device.

Regards,
Rajesh G.

Re: please advise

Kim wing — Thu, 05 Jun 2003 04:02:31 GMT

Sorry, I missed the attachment.

Re: please advise

Rajesh G. Ghone — Thu, 05 Jun 2003 04:06:20 GMT

Yes Kim your configuration file seems to be ok.

Regards,
Rajesh G.

Re: please advise

S.K. Chan — Thu, 05 Jun 2003 04:15:43 GMT

What I've done before to save my crash dumps to disk instead of dump area is to create a separate filesystem (this can be temporary) and mount it as /var/adm/crash. That filesystem has to be at least equal to the size of your RAM. So for your case you need a 2GB fileystem space. The answer to your next question (2) would depends on wheather the dump area where the crash dump was written has been overwritten or not. Most likely yes if your system is swapping. You can try to run it though to see if it's succesful or not. If you had created the separate filesystem mounted as /var/adm/crash you can just run ..
# /sbin/savecrash -vr

Re: please advise

Kim wing — Thu, 05 Jun 2003 04:29:12 GMT

Thanks Rajesh.

S.K. Chan
OK.
My /data file system has 4GB space which is enough. I want my /data file system to be the default for the crash files when the system crashes again. Do I really need to mount /data to /var/adm/crash or changing the savecrash to point to /data/crash directory will be enough?

Do I need to change the variable typeset -r DEFAULT_SAVECRASH_DIR=/var/adm/crash in the /sbin/rc1.d/S440savecrash or not? for the crash files to be saved in /data/crash during boot up?
Finally, I'm just curios if you can give me an example on how to mount my /data file system to /var/adm/crash?
Also, did you mean that I can recreate the dump while the users are using the system.
Thanks

Re: please advise

Kim wing — Thu, 05 Jun 2003 04:36:02 GMT

Hello,

I need answers for my last questions?
Thanks again.

Re: please advise

Rajesh G. Ghone — Thu, 05 Jun 2003 04:37:01 GMT

Hi Kim,

You can mount it to /va/radm/crash inspite of /data & you can put the entry in /etc/fstab file so that you dont have to mount manually every time.

Regards,
Rajesh G.

Re: please advise

Kim wing — Thu, 05 Jun 2003 04:37:19 GMT

Hello,

I need answers for my last questions?
Thanks again.

Re: please advise

Kim wing — Thu, 05 Jun 2003 04:39:10 GMT

Hello,

I need answers for my last questions?
Thanks again.

Re: please advise

Rajesh G. Ghone — Thu, 05 Jun 2003 04:39:42 GMT

Hi Kim,

You can mount it to /va/radm/crash inspite of /data & you can put the entry in /etc/fstab file so that you dont have to mount manually every time.

Regards,
Rajesh G.

Re: please advise

Kim wing — Thu, 05 Jun 2003 04:40:08 GMT

Hello,
I still answers for my last post?
Thanks again

Re: please advise

Kim wing — Thu, 05 Jun 2003 04:40:45 GMT

Hello,
I still answers for my last post?
Thanks again

Re: please advise

Kim wing — Thu, 05 Jun 2003 04:40:55 GMT

Hello,
I still answers for my last post?
Thanks again

Re: please advise

Kim wing — Thu, 05 Jun 2003 04:41:53 GMT

hello there,

Any answers for my last post please?
appreciate it.

Re: please advise

Rajesh G. Ghone — Thu, 05 Jun 2003 04:42:05 GMT

Hi Kim,

You can mount it to /va/radm/crash inspite of /data & you can put the entry in /etc/fstab file so that you dont have to mount manually every time.

Regards,
Rajesh G.

Re: please advise

Kim wing — Thu, 05 Jun 2003 04:45:58 GMT

hello there,

Any answers for my last post please?
appreciate it.

Re: please advise

Kim wing — Thu, 05 Jun 2003 04:46:52 GMT

Hello there,

Any answers please?
appreciate it.

Re: please advise

Kim wing — Thu, 05 Jun 2003 04:47:07 GMT

Hello there,

Any answers please?
appreciate it.

Re: please advise

S.K. Chan — Thu, 05 Jun 2003 04:56:25 GMT

Kim,
I did some checking for you .. since savecrash is execute in run level 1 (/sbin/rc1.d) and after "localmount" (in /sbin/rc1.d) you can safely use /data. You are on the right track ..
first create a separate dir (ie /data/crash) and then modify these ..
1) /etc/rc.config.d/savecrash
SAVECRASH=1
SAVECRASH_DIR=/data/crash
2) /sbin/init.d/savecrash
typeset -r DEFAULT_SAVECRASH_DIR=/data/crash
.. and you should be set. Your other option is "remount" the logical volume that's mounted on /data to /var/adm/crash instead, that way you don't need to mess with the changes in the above file. To do that (lets say /data is on /dev/vg01/lvol2)..
# cd /
# umount /data
==> Can only do this is no one is accessing the dir.
# mkdir /var/adm/crash
==> Create the dir if not already exist.
# mount /dev/vg01/lvol2 /var/adm/crash
==> Previous files/dirs in /data would still appear in /var/adm/crash.
To make this mount point permanent edit /etc/fstab file.