I LPM'ed
an AIX LPAR from Frame A to Frame B. The LPAR id before the LPM was 99
and after the LPM it's still 99. And the system id has changed, as
expected. Good.
Before migration.
root@lpar1 / # uname -L
99 lpar1
root@lpar1 / # lsattr -El sys0 -a systemid
systemid IBM,017268B60 Hardware system identifier False
After migration.
root@lpar1 / # uname -L
99 lpar1
root@lpar1 / # lsattr -El sys0 -a systemid
systemid IBM,0157F5B16 Hardware system identifier False
Great, that's exactly what I wanted.
Hang on a minute! What kind of sorcery is this?!
root@lpar1 / # errpt | grep sys
60AFC9E5
0405132517 I O
sys0
Partition ID changed since last boot.
root@lpar1 / # errpt -aN sys0
---------------------------------------------------------------------------
LABEL: PARTID_CHANGE
IDENTIFIER: 60AFC9E5
Date/Time: Wed Apr 5 13:25:53 EET 2017
Sequence Number: 81372
Machine Id: 000157F5B16
Node Id: lpar1
Class: O
Type: INFO
WPAR: Global
Resource Name: sys0
Description
Partition ID changed since last boot.
Whaddaya mean my partiton ID changed since last boot?! It hasn't! I know this for a fact! Look at the uname output above!!
Well, I'm 100% correct, the partition id HAS NOT CHANGED! But the system id has....and this is the cause of the "informational" message in the AIX error report.
AIX uses the output from 'uname -f' to detect if the system AND/OR partition id have changed since last boot.
So, in my case, the
partition id (99 dec/63 hex) did not change but (as you'd expect with
LPM) the system id (shown in hex below) has changed, hence the message "Partition ID changed since last boot".
Before LPM.
root@lpar1 / # uname -f
80000BA02DC00063
After LPM.
root@lpar1 / # uname -f
800016B466F00063
From the uname man page:
-F Displays a system identification string comprised of hexadecimal characters. This identification string is the same for all partitions on a particular system.
-f Similar to the F flag, except that the partition number is also used in the calculation of this string. The resulting identification string is unique for each partition on a particular system.
So, no problem here. Nothing to see, nothing to do. Move along!
Tags:
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