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Old August 24th, 2007
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ross.mather Offline
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Join Date: January 2007
Location: Nomadic in the UK
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Re: only 1 path of multi-path fibre SAN visible

This problem will - in all probablility - be the same for all vpaths, so investigating one should be enough.

For each fcs we need to do this:

lscfg -l fcs0 -vps | grep Network
Which will show you something like:
Network Address.............10000000BCA31432

This is the WWN of the fibre card - actually this fulfills the same function as a MAC Address for an Ethernet Card.

Check also:
lsattr -El fscsi0 | grep attach
Which (hopefully) will show:
attach switch How this adapter is CONNECTED False

This means that the Fibre card is correctly connected to the switch.

Picking the example above do:
lscfg -l hdisk21 -vps

The following fields are important
Machine Type and Model......2107900
Serial Number...............2135438000
Device Specific.(Z1)........0101

The LUN id is the last three digits of the Serial Number and the 4 digits of the Z1 field. You can use this info to verify via the GUI for the shark if the LUN is indeed allocated to the two relevant Fibre Cards. You can also check the configs in the switchs via the GUI to see that the two WWNS are allocated to the same zone as the Fibre Cards for the Shark - you may need to dig out the manuals to do those.
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Ross Mather, IBM AIX IT Specialist.
That said anything I say here is my own opinion and not anything that you can ever hold against IBM.
Ohhh and don't forget that I make mistakes too....
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