How to find WWN for RAW device mapped LUN?

[usao]

I presented a set of 4 LUNs from Clariion to 2 ESXi servers.

On each of these servers, I have a CentOS VM running.

I presented all 4 luns to both CentOS VM's using Raw Device Mapping.

Im using a application which provides it's own clustering software, and as such, I need to identify which of the 4 luns are which on each of the hosts.

Ideally, I would like to create a mapping between /dev/sdb and it's WWN, and between /dev/sdc and it's WWN etc...

That way, I can make sure that each of the 4 luns on both VM's are setup in the correct order for the application to reference them.

So, on a CentOS VM, how can I obtain the WWN of a Raw Device Mapped from ESXi host?

Thanks,

Ron

[sparrowangelste]

The way RAW mappings work, the vm wouldnt be aware that its connected to a san.

it should view the lun as a locally presented disk.

if you want it to be aware of the wwn, it might have ot be connected through the vm itself.

A raw device mapping is effectively a symbolic link from a VMFS to a raw LUN. This makes LUNs appear as files in a VMFS volume. The mapping file — not the rawLUN — is referenced in the virtual machine configuration. The mapping file contains a reference to the raw LUN.

http://www.vmware.com/pdf/esx25_rawdevicemapping.pdf

this link might help

http://pubs.vmware.com/vi35/wwhelp/wwhimpl/common/html/wwhelp.htm?context=fibre_san_config&file=esx_san_cfg_manage.8.19.html