topic Re: LUN Mapping in Operating System - Linux

LUN Mapping

Notts_sys2 — Fri, 25 Sep 2009 10:25:44 GMT

Dear All,

We have SUSE Enterprise Server 10 running OES. We have some LUNs presented to the server from an EVA. We can see the appropriate device names on the server (ex: /dev/sda) but due to lack of documentation at the time of creation of these LUNs, we are unable to map them to the LUNs on the EVA. Using Yast, the udi number shows the EVA Controller serial number so we are not able to map which devices on the server maps to what LUNs on the EVA. So was wondering if there was any way on the server to display the WWN numbers of these devices/LUNs so we could map it to appropriate LUNs on the EVA or any other technique to do the same.

Re: LUN Mapping

Rob Leadbeater — Fri, 25 Sep 2009 10:48:56 GMT

Hi,

Try looking in the output of "dmesg". That should hopefully give you enough information to go on...

If you have the HP HBA drivers installed then you should have the command "lssd" which might give some more information...

Cheers,

Rob

Re: LUN Mapping

Michael Leu — Fri, 25 Sep 2009 11:49:47 GMT

You can try
scsi_id -g -p 0x83 -s /block/sda
which should give you the World Wide LUN Name.

Re: LUN Mapping

Ivan Ferreira — Fri, 25 Sep 2009 14:02:58 GMT

The scsi_id -g -s /block/sda is the way to go. You can map then the information with the WWN you can get from the VDISK in the general tab using command view.

Re: LUN Mapping

Notts_sys2 — Fri, 25 Sep 2009 14:11:08 GMT

Thanks, i used the scsi_id option and it solved my issue.