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3. Ensure that the storage subsystem supports the storage enclosures that you are
trying to add or migrate.
4. In the drive enclosure migration situation, verify the controller firmware level
of both the source and target storage subsystems. Upgrade both source and
target storage subsystems to the same controller firmware if possible.
5. If the storage enclosure that is to be migrated is not the same type as the
existing storage enclosures (some or all), see "Intermixing storage enclosures"
on page 11 for intermix information.
6. If you are adding new enclosures with new drives, proceed with the steps in
"Adding new storage enclosures with new hard disk drives"; otherwise,
proceed to the steps in "Migrating storage enclosures with hard disk drives that
have defined logical drive configurations."
Adding new storage enclosures with new hard disk drives
To add new storage enclosures with new hard disk drives, complete the following
steps:
1. Set the enclosure ID of the additional storage enclosures with Fibre Channel
drive ports that have a mechanical enclosure ID switch.
Each enclosure in the storage subsystem configuration must have a unique
enclosure ID. In addition, the IDs of enclosures (including the storage
subsystem with internal drive bays) that are connected together in the same
redundant drive loop/channel pair must each have a unique rightmost digit.
For example, 01, 02, 03, 04 or 11, 12, 13, 14 are the correct IDs of the enclosures,
including the subsystems with internal drives that are connected together in a
drive loop/channel, whereas 01, 11, 21, 31 or 11, 11, 22, 33 are not the correct
IDs of the enclosures that are connected together in a drive loop/channel pair
(including the subsystems with internal drives) because the rightmost digits in
the enclosure IDs are not unique (01, 11, 21, 31) or the enclosure IDs are not
unique (11, 11, 22, 33).
The DCS3700 and EXP3800 storage enclosures have a display mechanism to
show the enclosure ID. The enclosure ID is automatically set by the controller
firmware. You can change the enclosure ID using the IBM DS Storage Manager
client.
For more information, see the documentation that comes with your storage
enclosure.
If the storage subsystem to which the storage enclosure attaches is a DCS3700
or DCS3860 storage subsystem with Gen2 controllers, the enclosure IDs of
additional storage enclosures must be unique to the storage subsystem. The
enclosure IDs are normally set to 00 at the factory.
2. Proceed to "Step 6: Cabling, turning on, and verifying storage enclosure
operation" on page 31. Do not perform Activities 3–5.
Migrating storage enclosures with hard disk drives that have
defined logical drive configurations
Before you begin, review the "Drive migration limitations" on page 7 section.
Drives with disk pools cannot be migrated from one subsystem to another. The
data in the disk pool must be backed up to a tape or to drives that are part of
traditional arrays. Then, the data is restored to newly created disk pools in another
storage subsystem.
To migrate storage enclosures with hard disk drives that have defined logical drive
configurations, complete the following steps.
Chapter 3. Adding or migrating storage enclosures
27
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