Rorke Data Galaxy Aurora Series Configuration And System Integration Manual page 121

G A L A X Y ® A U R O U R A C O N F I G U R A T I O N A N D S Y S T E M I N T E G R A T I O N G U I D E
Going clockwise from the upper left, you have to have a RAID in order to
create a LUN. The user and Initiator are optional, however if there are any
defined, the user you are trying to communicate with must also be set up as a
user and given read only or read/write access to the LUN. Then the Target is
optional, however if one is assigned to the LUN, then it must be on the same
connection that the client is going to be connected to. The SFP on the array
being used must be working – with no more than one connected to a switch if
you are using a switch (unless you are doing some careful zoning on the
switch). For troubleshooting, if you have a switch, you may want to remove it,
otherwise either of the SFPs, cables, switch, or zoning could be the problem. If
you are using a switch, and it is zoned, make sure the array and the client are
in the same zone (I have had a tech support story once about a switch which
was rented by a customer, and although they didn't zone the switch, the
previous renter did, disabling the ports that were being used). Then on the
client, the cable or SFP could be a problem, and the HBA could have a
problem. There could be an OS problem (which is rare), or a problem with the
driver. Here's the troubleshooting technique: If you look carefully at the chart,
there is a straight chain, going from RAID to the Fibre Driver on the client. You
should troubleshoot from one end of the chain to the other, otherwise it is
confusing. Start by making sure there is a RAID, with a LUN on it. Next, look at
Users, and see if the user is showing up at all. If not, skip to the other end of
the chain, and start troubleshooting from that end. If the user is showing up
under users, then it is almost certainly a problem with an Initiator or target
setting – check to make sure either no targets exist, or that the target being
120 Section 4 Troubleshooting Guide