AIX : ksh: alt_disk_install: not found error

I have encounter this error multiple times. Reason behind the error is missing bos.alt_disk_install.rte fileset. In below steps we will see how to resolve the problem
Task 1 :I have ran the below command to remove the old_rootvg and got the error “ksh: alt_disk_install: not found”

$ alt_disk_install -X old_rootvg
ksh: alt_disk_install: not found

Task 2: Verify if bos.alt_disk_install.rte fileset is missing . In below example, fileset is not installed

$lslpp -l bos.alt_disk_install.rte
lslpp: 0504-132 Fileset bos.alt_disk_install.rte not installed

Task 3 : Check all filesets are present for all Technology Level correctly.

$ instfix -i | grep ML
All filesets for 6100-00_AIX_ML were found.
All filesets for 6100-01_AIX_ML were found.
All filesets for 6100-02_AIX_ML were found.
All filesets for 6100-03_AIX_ML were found.
All filesets for 6100-04_AIX_ML were found.
All filesets for 6100-05_AIX_ML were found.
All filesets for 6100-06_AIX_ML were found.

Task 4 :Install the bos.alt_disk_install.rte with corresponds to the current Technology Level

smitty nim -> Install and Update Software -> Install Software -> select the LPP source - > select the package " bos.alt_disk_install.rte 6.1.6.15 " -> Enter - > Enter

Task 5: Verify  bos.alt_disk_install.rte fileset got install successfully.

$ lslpp -l bos.alt_disk_install.rte
Fileset Level State Description
----------------------------------------------------------------------------
Path: /usr/lib/objrepos
bos.alt_disk_install.rte 6.1.6.15 APPLIED Alternate Disk Installation
Runtime

Path: /etc/objrepos
bos.alt_disk_install.rte 6.1.6.15 APPLIED Alternate Disk Installation
Runtime

Hurry !!!!!!!!!!!!! Now run the most useful comand alt_disk_install successfully . Hurry !!!!!!!!!!!!!

 * Source Article from : Internet