On Friday, September 09, 2011 12:54:51 AM Paras pradhan wrote:

Hi,

I have a host which is connected to SAN via single Fibre channel HBA (qlogic). I have several LUNS assigned to this (sdc, sdd). I added another single port HBA to this host. I can now see two world wide names.

Now the confusion is which world wide name does sdc and sdd is/was using.

scsi_id -g -u -s /block/sdc only gives wwid but I need the wwn for sdc and sdd.

I'm not sure I understand what you're looking for but info on the local fc port through which a device is seen can be found in: /sys/class/fc_host/hostX/ where X is the scsi host number (which can be seen in lsscsi output for example.

If you want info on a remote port have a look in: /sys/class/fc_remote_ports/rport-XXXXXX/

Mapping scsi dev to rport-XXXXXX can be done via: /sys/class/fc_transport/targetSCSI-ID/port_name

(or you could just build lsscsi >=0.19 and use the -t option).

/Peter

Thanks Paras.