AIX 5L Problem Determination - IBM Redbooks

► The remote host must be operational and on the network. This condition can
be tested by issuing the ping command.
► The remote host must have an NFS exported directory defined such that the
local host has read and write permissions as well as root access to the dump
file on the remote host.
► The remote host cannot be the same as the local host.
To change a primary dump device permanently, use the sysdumpdev command
as follows:
# sysdumpdev -P -p /dev/hd3
primary /dev/hd3
secondary /dev/sysdumpnull
copy directory /var/adm/ras
forced copy flag TRUE
always allow dump FALSE
dump compression OFF
This will remain the permanent dump device until it is changed again with the
sysdumpdev command.
To change the secondary device permanently, use the sysdumpdev command as
follows:
# sysdumpdev -P -s /dev/rmt0
primary /dev/hd3
secondary /dev/rmt0
copy directory /var/adm/ras
forced copy flag TRUE
always allow dump FALSE
dump compression OFF
To temporarily change the primary device to another device, use the sysdumpdev
command as follows:
# sysdumpdev -p /dev/rmt0
primary /dev/rmt0
secondary /dev/sysdumpnull
copy directory /var/adm/ras
forced copy flag TRUE
always allow dump FALSE
dump compression OFF
This will temporarily change the primary dump device to /dev/rmt0 until the next
system reboot.
Chapter 5. System dumps 67