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eSeries MXE 460 Host can't see IBM SAN DS4500 storage

Posted on 2010-11-22
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Last Modified: 2012-05-10
Hi Guys,

We have an IBM SAN DS4500 connected to two hosts IBM eSeries MXE460 (eight nodes) via Fiber Channel and two Brocade Switches. We believe that our SAN system is configured properly, we can create Arrays, LUNs and Zoning are online. But somehow when we present the storage to the VMWare host (ESXi 4), nothing is showing up in VSphere (after running multiple time "Rescan All" on all HBAs). Also, we believe that we provided the right WWN from the Brocade Switches, we retrieved the WWN when we created the Zone.

Now, I would like to know if someone can tell me how to check if the HBAs are communicating properly between the SAN, Brocade Switches AND the VMWare Hosts (MXE 460). I tried so many things, but don't know what to do now - if someone can give me some hints then this would be GREAT!

If you need further details, please let me know.

Please don't ask me to place a call with IBM, this would be the last resort.

Thanks!
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Question by:patgraves
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Author Comment

by:patgraves
ID: 34188729
.
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LVL 47

Accepted Solution

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dlethe earned 500 total points
ID: 34196439
First thing I would do is log into the switch and just for grins, make sure that the physical ports (on switch) that everything is plugged in are all in the same zone (not the WWNs, as this leaves room for human error).

There are some products that can help diagnose, but they aren't free.  Most convenient is santools.com's smartmon-ux which has a simple fcping command that is like the tcp/ip ping you run to see if you can get to an ip address.  The fcping works with a WWN.  

Maybe it is lun masking, which is built-into qlogic HBAs?   Have you verified that this is not the problem, and the HBA is not causing the issue?
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Author Closing Comment

by:patgraves
ID: 34231705
I [b]apologize[/b] for the late reply. I found the source of my problem, I'll give the points to dlethe as he is the only person that gave me some hints - Thanks.

The solution was to move to the ports we are licensed to use. In our case,our system is allowed to use from port 0 to 7. Once we move the Fibre Cables from Ports [8-11] to Ports [4-7] we are now able to see the SAN DS4500 storage on the VMWare Host. And just FYI, once it works port name is changed from "U-Port" to "F-Port".

This screenshot below is taken before the fix:
[code]
IBM_2005_16B:root> switchshow
switchName:     IBM_2005_16B
switchType:     34.0
switchState:    Online  
switchMode:     Native
switchRole:     Principal
switchDomain:   1
switchId:       fffc01
switchWwn:      n:o:t:g:i:v:e:n
zoning:         ON (cfgNewZone)
switchBeacon:   OFF

Area Port Media Speed State
==============================
  0   0   id    N2   Online    F-Port  21:n:o:t:g:i:v:e:n:x
  1   1   id    N2   Online    F-Port  21:n:o:t:g:i:v:e:n:y
  2   2   id    N4   In_Sync  
  3   3   id    N4   In_Sync  
  4   4   id    N4   No_Light  
  5   5   id    N4   No_Light  
  6   6   id    N4   No_Light  
  7   7   id    N4   No_Light  
  8   8   id    N4   No_Sync   (No POD License) Disabled
  9   9   id    N4   No_Light  (No POD License) Disabled
 10  10   id    N4   No_Light  (No POD License) Disabled
 11  11   id    N4   In_Sync   (No POD License) Disabled
 12  12   --    N4   No_Module (No POD License) Disabled
 13  13   --    N4   No_Module (No POD License) Disabled
 14  14   --    N4   No_Module (No POD License) Disabled
 15  15   --    N4   No_Module (No POD License) Disabled
[/code]
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Expert Comment

by:dlethe
ID: 34231780
That is why you log into the switch ...  it is amazing how much info you can get by asking the switch to dump state & configuration. :)

Boy, you would think they would have licensed it to # of ports, not nailed specific port numbers!
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