IBM N Series, Implementation Manual

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Chapter 5: Moving a Disk S helf to a Gateway 43
Requirement if the
N series storage
system root volume
is on the disk shelf
Only one root volume is permitted on a system. A root volume that was
configured for the N series storage system cannot be used on the gateway.
If the root volume for the N series storage system is on the disk shelf that you
plan to move to the gateway, the requirements are as follows.
Availability of data
while the shelf is
being moved While you are installing the disk shelf on the gateway, the data on the disk shelf
is not available until installation on the gateway is complete (assuming you are
preserving the data on the disk shelf). However, access to other storage
associated with the gateway is not interrupted. You do not need to shut down the
gateway to be able to install the disk shelf on it. You can
hot-add disk shelves on
the gateway (that is, add disk shelves without shutting the system down.)
If... Then...
You still need the root volume for the
N series storage system You must move the root volume to
another disk shelf that will remain
with the N series storage system
before you move the disk shelf.
You do not need the root volume for
the N series storage system Move the disk shelf to the gateway.
Data ONTAP prevents any conflict
with the root volume already
configured on the gateway; when you
move the disk shelf with the N series
storage system root volume to the
gateway, Data ONTAP flags the N
series storage system root volume as
a foreign object. Data ONTAP
renames the root volume from aggr0
to aggr0(1) and vol0 to vol0(1). Data
ONTAP also removes the “root” flag
from the disk set so that the gateway
cannot boot from the N series storage
system root volume.