IBM N Series, Implementation Manual

Page: 67 / 105

Chapter 5: Moving a Disk S helf to a Gateway 53
Optional configuration after moving the disk shelf
Turning on
automatic disk
assignment Automatic disk assignment is an optional feature that enables Data ONTAP to
look for and automatically assign any unassigned disks to same system and pool
as all other disks on the same loop.
On gateways, automatic disk assignment is available only for disks on the disk
shelves connected to it. Automatic disk assignment is not supported for assigning
array LUNs to gateways.
When to reenable automatic disk assignment: Automatic disk
assignment is enabled by default. However, when you move a disk shelf from an
N series storage system to a gateway, you must disable automatic disk
autoassignment if you want to preserve the data on the disk shelf. If you want the
automatic disk assignment functionality after the shelf is moved, you must
reenable it after you finish moving the disk shelf and then reassigning the disks
on the disk shelf to the gateways.
Reenabling automatic disk assignment: To turn automatic disk
assignment back on, complete the following step.
Completing setup
for Multipath
Storage If you are using Multipath Storage with an HA pair, you need to cable it and
finish configuring it after you move the disk shelf to the gateway. See Appendix
B, “
Setting up and Managing Multipath Storage ,” on page 65 for instructions if
you want to use Multipath Storage with a disk shelf on a gateway.
Attention
On the gateway, you must set the environment variable required for the gateway
for the first disk shelf in each loop before you connect the disk shelf to the
gateway.
Step Action
1 For Data ONTAP 8.0 7-Mode and 7.x releases, enter the following
command:
options disk.auto_assign off