LVM - adding alternate paths to disks

[Ravinder Singh Gill]

Hi,

I have just created a volume group with logical volumes and filesystems for it. Can someone remind me how to add in alternate paths for the disks I have allocated to that volume group?

[James R. Ferguson · Accepted solution]

Hi:

Simply 'vgextend' using the alternate path:

# vgextend /dev/vgNN /dev/dsk/cXtYdZ

Regards!

...JRF...

[Luk Vandenbussche]

With the vgextend command

vgextend /dev/vgxx /dev/dsk/cxtydz

You can check the status with

vgdisplay -v vgxx

At the end you see alternate link

[Aneesh Mohan]

Hello Ravinder,

Please do vgextend vgname /dev/dsk/cxtxdx (alrenative paths)

example

IF /dev/dsk/c1t2d0 is the alrenative path for primary path /dev/dsk/c1t0d0 and already u have created VG using the primary disk ,then do the below cmd.

vgextend vg00 /dev/dsk/c1t2d0

[Torsten.]

The system can also help you to find the alternate pathes:

vgscan -p -v

This is preview mode. Watch the results.
Then vgextend the pathes to the VG.
Think about the order!

[Ravinder Singh Gill]

Thanks, the first 2 suggestions solved it but I didn't get the chance to close it.

Thanks for your help.

[Luk Vandenbussche]

PS : Points are always appreciated when you close a case ;-)

[Avinash Agarkar]

Hi Ravinder,

After adding the alternate path please check with vgdisplay weather both the disk are their or not if both the disks are their please try to check with reducing the primary path with

vgreduce vgname and disk path

A message with come switching over to alternate path.

If it successfull then it's good

then again extend the path
with vgextend.

This is for your precaution.

Thanks,
Avinash