IBM N Series, Руководство по внедрению

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Chapter 5: Moving a Disk S helf to a Gateway 45
Requirements if you
want to preserve
data on the disk
shelf
If you want to preserve the data on a disk shelf for use with the gateway, the
requirements are as follows:
◆
Ensure that the combined total of aggregates and volumes on the disk shelf
and on array LUNs does not exceed the limits.
◆
Turn off Data ONTAP automatic assignment of disks before you move the
shelf to the gateway (see “ Turning off automatic disk assignment ” on
page 49). If desired, you can turn automatic assignment of disks back on
after setup of the disk shelf on the gateway is complete.
Note
With Data ONTAP automatic disk assignment (the default behavior), Data
ONTAP automatically looks for any unassigned disks on a predetermined
schedule and assigns them to the same system and pool as all other disks on
the same loop.
◆
Resolve any duplicated names of aggregates and volumes on the disk shelf
you are moving and the gateway.
All aggregate names and volume names on the same system must be unique.
If you want to preserve the data on the disk shelf, you need to determine
whether any aggregate and volume names are the same on the two systems
before you move the disk shelf to the gateway. If there are duplicates, you
need to rename the duplicated names on the disk shelf you are moving.
Attention
Data on the disk shelf being moved remains intact through the ownership
transition if you have followed the steps described in this section about
preserving data on the disk shelf.
Requirement to
change disk
ownership The disks on the disk shelves you are moving have already have been assigned to
an N series storage system. A gateway cannot use disks that an N series storage
system owns. Therefore, you must remove N series storage system ownership of
the disks and assign them to a gateway before you move disk shelf from an N
series storage system to a gateway. See “
Reassigning ownership of N series
storage system disks to a gateway ” on page 50.