SYSTEM DUMP

1, AIX 4.2.1 and greater supports system dump to paging space.
2, AIX 4.3.3 and greater supports system dump to mirrored paging space.
3, Primary dump device must be in the rootvg
4, Secondary dump device can be outside rootvg unless it is a paging device.

sysdumpdev -l        Lists current dump destination.
sysdumpdev -e        Estimates dumpsize of the current system in bytes.
sysdumpdev -L        Displays information about the previous dump.

sysdumpstart -p      Starts a dump and writes to the primary dump device.
sysdumpstart -s      Starts a dump and writes to the secondary dump device.

(MCA machine can also dump if key is in service position and the reset
 button is pressed)

sysdumpdev -p (dump device) -P        Sets the default dump device, permanently

Analyse dump file :-
echo "stat\n status\n t -m" | crash /var/adm/ras/vmcore.0

snap -gfkD -o /dev/rmt0     Copy dump to tape to send to IBM support, uses tar.