[AIX] How to make 'alt disk' using alt_disk_install

Let me introduce to you about making alt disk for system backup and test server system or new server instead of mksysb.

1. Prepare available disk(hdisk2)

root@test: / # lspv
hdisk0          00ce30ffea377c7b                    rootvg          active
hdisk1          00ce30ff5eac4b0a                    rootvg          active
hdisk2          none                                       none
 
1.1 Making pvid using chpv command

root@test: / # chdev -l hdisk2 -a pv=yes
hdisk2 changed

root@test: / # lspv
hdisk0          00ce30ffea377c7b                    rootvg          active
hdisk1          00ce30ff5eac4b0a                    rootvg          active
hdisk2          00ce30fffea34bc7c                    none

2. 'alt disk' is reference of 'image.data' file smilar with mksysb backup.
So you should modify 'image.data' file when you use it to mirrored rootvg.
It just can use only changing LP, PP and copy contents to 1 of image.data file and using below command.

root@test: / # alt_disk_install -CBO hdisk2 -i image.data_name

The option of alt_disk_install we usually used are listed below.
 
- C : clone
 
- B : Not to change bootlist
  
- O : altinst_rootvg ODM cleaning for using another system

       Cleaning ODM contents  with option O
      - hostname, N/W information,  other device information




Inform)

When you try to use 'alt disk' for other system, you should to input option 'O'.
But remove the option when you use it for same system for system backup.

3. You can see an alt disk after complete upper task.

root@test: / # lspv
hdisk0          00ce30ffea377c7b                    rootvg          active
hdisk1          00ce30ff5eac4b0a                    rootvg          active
hdisk2          00ce30fffea34bc7c                   altint_rootvg

4.Remove the alt disk from system. Type the below command. (Not to use exportvg command)

#alt_disk_install -X altinst_rootvg

If you don't use upper command when moving another system, The system's ODM could be complicated

Sometimes you need to change 'bootlist' because it can be changed to altinst_rootvg

5. You can use a below command not mirrored vg but extended vg.

#smitty alt_clone을 이용하거나
 
Or changing image.data likes number 2 and type below command
 
#alt_disk_install -CBO -i /image.data hdisk2