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Qlogic hba driver: FC Port information format

Posted on 2010-09-09
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Last Modified: 2012-05-10
Hello, experts !

Could any one point to what is the format of the qla drive entry in the /proc/scsi directory:

FC Port Information:
scsi-qla1-port-0=50060160bce02a1c:  500601623ce02a1c:161f00:81;

I need to know what two last fields mean, please

>> 161f00:81

what is "161f00"
and what is "81"

Thanks a lot in advance !



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Question by:polundra
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Expert Comment

by:Duncan Meyers
ID: 33634442
161f00 is the FCID - it's assigned by the FC fabric (SAN switch in this case).

81 is probably the LUN number - but that's a guess.
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Expert Comment

by:Duncan Meyers
ID: 33634450
It looks like you're connected to a Symmetrix or DMX, so I'd be moderately confident in the guess that 81 is the LUN
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Author Comment

by:polundra
ID: 33634514
>> 161f00 is the FCID - it's assigned by the FC fabric (SAN switch in this case).

This could be it, do you have a reference to the format, please ?

>> 81 is probably the LUN number - but that's a guess.

I do not think so. there is not lun 81 presented from storage ...
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Duncan Meyers earned 1500 total points
ID: 33634976
it is made up of FC switch domain ID, area ID and switch port number and  it's assigned by the fabric name server when the node logs in. The domain and area IDs will vary from switch manufacturer to switch manufacturer.
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Expert Comment

by:Duncan Meyers
ID: 33634981
Is there a LUN number 129?
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Author Comment

by:polundra
ID: 33635006
there is no lun 129
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Author Comment

by:polundra
ID: 33635100
Ok, found it in the source code. 81 is loop id...

Thanks for your help, meyersd !


   2600       /* Print out the port Information */
   2601       t = 0;
   2602       fcport = NULL;
   2603       copy_info(&info, "\nFC Port Information:\n");
   2604       list_for_each_entry(fcport, &ha->fcports, list) {
   2605
   2606             copy_info(&info,
   2607                   "scsi-qla%ld-port-%d="
   2608                   "%02x%02x%02x%02x%02x%02x%02x%02x:"
   2609                   "%02x%02x%02x%02x%02x%02x%02x%02x:"
   2610                   "%02x%02x%02x:%x;\n",
   2611                   ha->instance, t,
   2612                   fcport->node_name[0], fcport->node_name[1],
   2613                   fcport->node_name[2], fcport->node_name[3],
   2614                   fcport->node_name[4], fcport->node_name[5],
   2615                   fcport->node_name[6], fcport->node_name[7],
   2616                   fcport->port_name[0], fcport->port_name[1],
   2617                   fcport->port_name[2], fcport->port_name[3],
   2618                   fcport->port_name[4], fcport->port_name[5],
   2619                   fcport->port_name[6], fcport->port_name[7],
   2620                   fcport->d_id.b.domain, fcport->d_id.b.area,
   2621                   fcport->d_id.b.al_pa, fcport->loop_id);
   2622
   2623             t++;
   2624       }
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Author Closing Comment

by:polundra
ID: 33635110
partially answered
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Expert Comment

by:Duncan Meyers
ID: 33635548
No worries. Glad I could help.
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