Hi Gurus,

I have a server running RHEL5.6, having 2 HBA Cards and these are reaching through two individual FC switchs to SAN. Simply to say is SAN shared Luns to my server through 2 individual switches, and multipathing (device Mapper multipath) is configured

Here my query is if I issues command sfdisk –l its listning 20 Luns, so how to find which LUN coming through which FC switch.

Example
multipath -ll output
mpath24 (360060480000190103925) dm-38 EMC,SYMMETRIX
[size=30G][features=0][hwhandler=0][rw]
\_ round-robin 0 [prio=0][active]
\_ 2:0:0:40 sdbh 67:176 [active][undef]
\_ 0:0:0:40 sdy 65:128 [active][undef]
how to find sdbh path is coming from which switch.

if my query doesn't make sense please dont mind...

Any suggestions are appreciated

Thanks
JNREDDY

What type of switch? Log into it via serial port, if needed. The IP address for your switch is a good thing to document after you configure it.

All the LUNs you've configured multipathing for are coming through both switches. That's why you needed DM Multipath.

I think what you're really asking is how to "match" a device name / major / minor number with a switch.

One approach is to issue the following command:
Scroll through the output and find the WWN for each of your HBAs. (You'll want port_name for each.) Log in to your fibre switches and - from there - reconcile the HBA WWN with connections to the switch port.

1 members found this post helpful.

HI Anomie,


Thank you Anomie for your suggestions your command did the job thank you.


Thanks
JNREDDY