I'm a storage engineer by trade and have mapped a RHEL 4 server, several LUNs. I've mapped each (HBA Initiator) 4 times to seperate fibre channel ports on a storage array.

Is there a RH command to see the device mapped 4 times to the target. I would expect to see something in the output that has the subsystems WWN, such as -

... 50060F9004563210
... 50060F9004563220
... 50060F9004563230
... 50060F9004563240

Thanks, really appreciate any assitance. If anyone ever needs any storage specific assistance, please do not hesitate to ask.

Do you have the multipath tools installed/started? Not sure if they're available for RHEL4, but look. Then run "multipath -ll".

Also see the /dev/disk/by-path/ directory

Alucard,

Sorry it's actually RHEL5 and we are using the native dev-mapper for MPIO

If you are using mdmpd take a look at /proc/mdstat That should have all the device information you are looking for.