The Migration Upgrade option is missing when trying to perform an AIX upgrade.
Check the version of each copy of the boot logical volume (hd5). If any copy has the target AIX version or higher, this will cause the migration option to be unavailable.
<pre><code># lslv -l hd5
hd5:N/A
PV COPIES IN BAND DISTRIBUTION
hdisk0 001:000:000 100% 001:000:000:000:000
hdisk1 001:000:000 100% 001:000:000:000:000
# /usr/lpp/bosinst/blvset -d /dev/hdisk0 -g level
5.2
# /usr/lpp/bosinst/blvset -d /dev/hdisk1 -g level
5.3</code></pre>
To update the boot logical volume:
<pre><code># bosboot -ad /dev/hdisk0
bosboot: Boot image is 25214 512 byte blocks.</code></pre>