Server changing device paths...

[Coolmar]

Hi,

I have a vpar setup on one of our npars. It boots off a SAN disk. We are reconfiguring a couple of the fibre channel cables tonight and that means that the disk paths will change. It will be easy enough to find where the root disk is to boot. Once I have booted I am expecting that I will just have to vgimport the mapfile once I have booted up in order to see the volume groups and files. Am I correct or is there something I might be missing?

[Pete Randall · Accepted solution]

Sally,

It wasn't with VPars, but I did have a similar situation once and, as I recall, I was able to find everything using vgscan.


Pete

[Chan 007]

Sal,

I had an upgrade few months back. I took map file. Then when I rebooted the SAN box,

I needed those map files to save me..!!!

Also same problem once again when I had added more SAN switches to the network.

Keep map files in /root

Chan

[Coolmar]

Can I vgexport to a mapfile when the volume groups are active? Like, can I do the vgexport at any time? Do I have to create a new map file for each volume group...ie (vg00.map, vg01.map, etc)?

Then I assume when the system is rebooted, I will just have to import each map file. Hopefully the vgscan mentioned above will work first though.

[Deoncia Grayson_1]

yes you can use vgexport while the volume group is still active, just do it in preview mode otherwise it won't work:

Ex:

vgexport -m /tmp/vg????.map -s -p vgname

it will complain that the volume group is still active but otherwise it will create the map file.

[Pete Randall]

Sure, use vgexport with the -p (preview) option. It won't actually export but will create the maps.


Pete

[Coolmar]

Thanks!