Own filesystem for dump!

[Lopez1]

Hi,

I create an own filesystem for a system dump on Aix 4.3.
In order to work I have to modify the file /sbin/rc.boot.
Do you have an idea how?

Greetings
Lopez

 

[PSD]

Lopez,

You do not need to edit rc.boot to create a new filesystem for a system dump. Simply find out the estimated dump size i.e.

sysdumpdev -e

divide the output by 1000000 and multiply by 1024 to work out the size in megabytes.

Then create your filesystem i.e. /dump

Set this directory as you dump directory via:

sysdumpdev -d /dump

Check via :

sysdumpdev -l

Thats it. On a personal note I tend to set up non-mirrored dump devices and have one on each rootvg disk, i.e. /dev/dumpalv on hdisk0 and /dev/dumpblv on hdisk1.

Best of luck

PSD
IBM Certified Specialist - AIX V4.3 Systems Support
IBM Certified Specialist - AIX V4 HACMP

 

[Yegolev]

my method varies slightly: when I make the new fs in smit I set type to "sysdump" rather than "jfs" which is default.

After that I do "sysdumpdev -pP /dumpfs" (I think, hehe, please read man pages) and verify via "sysdumpdev -l".

Note that if you have something that consumes all your memory, that's how big your dump will be. Large systems can make large dumps.