AIX LPAR: Mirror and Unmirror rootvg

1. Extend Volume Group

{root_lpar5} / # lspv
hdisk0          00fdc1c94bc59dc2                    rootvg          active
hdisk1          00fdc1c958b70cc0                    None
hdisk2          00fdc1c95f7acf4a                    None
hdisk3          00fdc1c95f7acf93                    None
hdisk4          00fdc1c95f7acfdb                    None
hdisk5          00fdc1c963e5420f                    None
hdisk6          00fdc1c963e54259                    None
hdisk7          00fdc1c95f8023c4                    None
{root_lpar5} / # extendvg rootvg hdisk1
{root_lpar5} / # lspv
hdisk0          00fdc1c94bc59dc2                    rootvg          active
hdisk1          00fdc1c958b70cc0                    rootvg          active
hdisk2          00fdc1c95f7acf4a                    None
hdisk3          00fdc1c95f7acf93                    None
hdisk4          00fdc1c95f7acfdb                    None
hdisk5          00fdc1c963e5420f                    None
hdisk6          00fdc1c963e54259                    None
hdisk7          00fdc1c95f8023c4                    None

2. mirror with hdisk1

{root_lpar5} / # mirrorvg rootvg hdisk1
0516-1804 chvg: The quorum change takes effect immediately.

0516-1126 mirrorvg: rootvg successfully mirrored, user should perform
        bosboot of system to initialize boot records.  Then, user must modify
        bootlist to include:  hdisk0 hdisk1.
{root_lpar5} / #

3. Setting boot block to hdisk1

{root_lpar5} / # bosboot -ad /dev/hdisk1
bosboot: Boot image is 39638 512 byte blocks.

4. Setting boot list
{root_lpar5} / # bootlist -m normal hdisk0 hdisk1

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To Unmirror rootvg

1. Remove mirror
{root_lpar5} / # unmirrorvg rootvg
0516-1246 rmlvcopy: If hd5 is the boot logical volume, please run 'chpv -c '
        as root user to clear the boot record and avoid a potential boot
        off an old boot image that may reside on the disk from which this
        logical volume is moved/removed.
0516-1804 chvg: The quorum change takes effect immediately.
0516-1144 unmirrorvg: rootvg successfully unmirrored, user should perform
        bosboot of system to reinitialize boot records.  Then, user must modify
        bootlist to just include:  hdisk0.
 
2. clear boot record
{root_lpar5} / # chpv -c hdisk1

3. Remove from volume group
{root_lpar5} / # reducevg rootvg hdisk1
{root_lpar5} / # lspv
hdisk0          00fdc1c94bc59dc2                    rootvg          active
hdisk1          00fdc1c958b70cc0                    None
hdisk2          00fdc1c95f7acf4a                    doshvg          active
hdisk3          00fdc1c95f7acf93                    doshvg          active
hdisk4          00fdc1c95f7acfdb                    doshvg          active
hdisk5          00fdc1c963e5420f                    None
hdisk6          00fdc1c963e54259                    None
hdisk7          00fdc1c95f8023c4                    None