IBM N Series, Implementation Manual

Page: 83 / 105

Appendix B: S etting up and Managing Multipath S torage 69
Setup overview—Multipath Storage on an HA pair
The following table summarizes the high-level tasks necessary to use Multipath
Storage with a gateway with disk shelves. Perform the tasks in the order shown in
the table.
Step Action Location of detailed information
Prerequisites to setting up Multipath Storage
1 Install your HA pair and ensure that it is fully operational
before performing any activities to set up Multipath
Storage.
Note
When testing your basic HA pair, be sure that failover and
giveback is successful.
Data ONTAP High Availability
Configuration Guide or Data
ONTAP Active/Active
Configuration Guide
2 If the gateways in the HA pair are not already running
Data ONTAP 7.3 or higher, you must upgrade your
software. Data ONTAP Upgrade Guide
Gateway specific Multipath Storage setup requirement
3 On each node, configure the
fc-non-array-adapter-
list
environment variable for the first disk shelf on a new
loop to the gateway.
When you configure the
fc-non-array-adapter-list
environment variable, you explicitly enter the gateway
initiator port used for every path to the first disk shelf on
the loop. If you do not perform this step, the gateways in
the HA pair panic.
Attention
You must configure the
fc-non-array-adapter-list
environment variable before you connect the first disk
shelf on a new loop to the gateway. This step is not
necessary for N series storage systems.
“ Configuring the gateway
environment variable for
Multipath Storage
” on page 71
General instructions for completing Multipath Storage setup (these instructions pertain to gateways
and N series storage systems)