Technical data

The display in Example 4-1 shows that both Fibre Channel host bus
adapters are set for fabric topology as the current topology, the default.
When operating in a fabric, if the current topology is
FABRIC, it does not
matter if the next topology is Unavail, or that the NVRAM is not formatted
(Nvram read failed).
You may view the Nvram read failed message as an error, and may not
like the fact that the next topology is Unavail.
To correct the Nvram read failed situation and set the next topology to
fabric, usethe wwidmgr -set adapter command as shown in Example 4-2.
This command initializes the NVRAM and sets the mode of all Fibre
Channel host bus adapters to fabric.
Example 4-2: Correcting NVRAM Read Failed Message and Setting Fibre
Channel Adapters to Run on Fabric
P00>>> wwidmgr -set adapter -item 9999 -topo fabric
Reformatting nvram
Reformatting nvram
P00>>> init
______________________ Note _______________________
The qualifier in the previous command is -topo and not
-topology. You will get an error if you use -topology.
The item 9999 qualifier sets all Fibre Channel adapters. To set
a single Fibre Channel adapter, use the item qualifier with that
Fibre Channel adapter’s item number (see Example 4-1).
If, for some reason, the current topology is LOOP, you have to change the
topology to FABRIC to operate in a fabric. You will never see the Nvram
read failed message if the current topology is LOOP. The NVRAM has to
have been formatted to change the current mode to LOOP.
Consider the case where the Fibre Channel host bus adapter current
topology is LOOP as follows:
P00>>> wwidmgr -show adapter
item adapter WWN Cur. Topo Next Topo
[ 0] pga0.0.0.2.0 1000-0000-c922-4aac LOOP LOOP
[ 1] pgb0.0.0.4.0 1000-0000-c924-4b7b LOOP LOOP
[9999] All of the above.
4-4 Preparing the MSA1000 for TruCluster Server Use