How to mirror the rootvg in AIX?

How to mirror the rootvg in AIX?

This procedure is to assume the rootvg having hdisk0 and we need to take a mirror to hdisk1. 

  1. Ground work:


lspv                                 --> find out the none disk on the server for the mirroring.

bootinfo -s hdisk1            --> check the size of the hdisk1 (It should be equal or bigger than hdisk0)



  1. Mirror the rootvg


extendvg rootvg hdisk1             --> Extend hdisk1 into the rootvg (force to extend if it throws error "extendvg -f rootvg hdisk1")

mirrovg -S rootvg hdisk1           --> To initiate the mirror in background which help us to access the rootvg volume group

lsvg rootvg|grep -i stale      --> To check status of the sync process. (Execute the cmd again and again until the stale PPs becomes zero

lsvg -l rootvg                             --> Check and confirm the number of PPs is double than number of LPs.

bosboot -ad /dev/hdisk1            --> To create the boot images on hdisk1

bootlist -m normal hdisk0 hdisk1  -->  To add the hdisk1 on the bootlist.

bootlist -m normal -o           --> To confirm both hdisk0 and hdisk1 is part of the boot sequence.




  1. Validation


lsvg -l rootvg                        --> Check and confirm the number of PPs is double than number of LPs.

lsvg rootvg|grep -i stale       --> To check the number of stale pp is Zero




  1. Roll back


unmirrorvg rootvg hdisk1    --> To unmirror the hdisk1 in the mirroring.

reducevg rootvg hdisk1       --> To get the hdisk1 out of the rootvg

chpv -c hdisk1                         --> To Clear the boot image on the hdisk1

bootlist -m normal hdisk0    --> To remove hdisk1 on the boot sequence which means add the hdisk0 alone on the boot sequence.

bootlist -m normal -o           --> To confirm only hdisk0 is part of the boot sequence.




  1. Downtime


NO downtime required for this mirror process.






There are no attachments for this article.
Related Articles RSS Feed
LVM: Extend an existing Volume Group by adding a new disk
Viewed 5076 times since Sat, Jun 2, 2018
AIX, Security, System Admin↑ Clearing password history
Viewed 1755 times since Fri, Apr 19, 2019
AIX, Security, System Admin↑ Fix user accounts
Viewed 4312 times since Fri, Apr 19, 2019
LVM: Unmirror/Mirror "rootvg" Volume Group
Viewed 2966 times since Mon, May 21, 2018
Aix: How to assign a specific PVID
Viewed 6180 times since Fri, Feb 1, 2019
How to start daemons at the system startup in AIX servers
Viewed 1882 times since Tue, Jun 18, 2019
HOWTO: Copy a filesystem on AIX
Viewed 1994 times since Mon, May 28, 2018
10 AIX Commands to Add to Your Toolbox
Viewed 3945 times since Sat, May 19, 2018
Monitor logfiles and command output on AIX using multitail.
Viewed 1934 times since Thu, Feb 21, 2019
AIX Migrating from SDDPCM to AIXPCM (the easy way)
Viewed 19130 times since Mon, Dec 31, 2018