How To Mirror VG and Root VG
How To Mirror VG and Root VG
There are steps involved through which administrator can mirror a VG and RootVg.
Steps tp mirror a VG:
Step 1: Extend the VG.
# extendvg <vgname> <pvname>
Step 2: mirror the VG.
# mirrorvg <vgname> <pvname>
Step 3: synchronize the VG.
# syncvg <vgname>
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Steps to mirror RootVg:
There are steps by which admin can mirror a root vg:
Step 1: extend rootvg to a new pv:
# extendvg rootvg <pvname>
For eg:
# extendvg rootvg hdisk6
Step 2: mirror rootvg
# mirrorvg –m rootvg hdisk6
Step 3: make it bootable:
# bosboot –ad /dev/hdisk6
Step 4: define boot order:
# bootlist –m normal hdisk4 hdisk6
Step 5: synchronize rootvg:
# syncvg rootvg
Reboot OS to disable quorum checking on rootvg (By default disabled, when rootvg is mirrored but reboot is required).
Why rootvg is mirrored?
The main reason to mirror rootvg is to protect OS from disk failure.
Happy Learning !
VG Commands
Although we have already discussed the use of VG Commands in detail in previous posts on LVM, this post will give a brief review about the various VG commands we have learned so far.
# mkvg
Command is used to create a new VG.
# extendvg
Command is used to add PVs to VG.
# reducevg
Command is used to remove PV from VG.
# chvg
Command is used to change VG.
# lsvg
Command is used to list all the VG in the system.
# importvg
Command is used to add/install a VG.
# exportvg
Command is used remove the VG from the system. we will discuss about the significance of exportvg command in detail in posts to come.
# reorgvg
Command is used to reorganize the VG.
# syncvg
Command is used to synchronize a VG.
# varyonvg
Command is used to make VG available to the system for use.
# varyoffvg
Command is used to make VG unavailable to the system.
# mirrorvg
Command is used to mirror all LV within a VG.
source: https://abcofaix.wordpress.com/tag/mirrorvg/
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