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Storage firmware migration
The following notes describe information about controller firmware migration that
you must consider before you upgrade a storage subsystem:
v You can migrate the drives and storage enclosures in a storage subsystem to a
v To perform a migration from an original storage subsystem controller with
Note: For more information, see the "Drive migration limitations" on page 7
section.
Alternative procedure to upgrade a storage subsystem
controller enclosure
There is an alternative method to upgrade a storage subsystem controller
enclosure. To bring the new storage subsystem controller into an optimal state, you
must obtain a minimum of two new drives and a storage expansion enclosure (if
the storage subsystem controller did not have any available drive slots). Then you
must migrate the drives and drive expansion enclosure from the original storage
subsystem to the new storage subsystem.
To upgrade the storage subsystem controller by using this alternative method,
complete the following steps:
1. Plan the upgrade. For more information, refer to step 1 on page 46.
42
IBM System Storage DCS Series with Gen2 controllers Hard Disk Drive and Storage Enclosure Installation and Migration
Guide
Follow the instructions in the Premium Features Activation instructions that
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new controller only if the firmware in the controllers of the storage subsystem
and the new controller have the same major release version.
firmware version 7.xx or later to a new storage subsystem controller with
firmware version 7.xx or later , the controller firmware version in the original
controller must be the same as or earlier than the controller firmware version in
the new controller. As an exception, if either the original or the new DS3500 or
DCS3700 with Gen2 Controllers has controller firmware version 7.8x.xx.xx or
later installed, the original and the new DS3500 or DCS3700 with Gen2
Controllers must be upgraded to the same version as that of the 7.8x.xx.xx or
later controller firmware, before the head-swap. Two extra new drives might
need to be purchased to bring up the new storage subsystem for controller
firmware upgrading. Otherwise, the controller firmware in the new controller is
placed in the Controller Lock Down state.
Complete the following steps, if the 7.xx or later firmware version in the new
storage subsystem is earlier than the 7.xx or later firmware version in the
original controller:
1. Purchase two additional hard disk drives.
2. Build a configuration with the new hard disk drives and the new DS3500 or
DCS3700 with Gen2 Controllers subsystem enclosure. You might also need to
add a drive expansion enclosure if there are not any available drive slots in
the new DS3500 or DCS3700 with Gen2 Controllers storage subsystem
enclosure.
3. Use the storage enclosure or drive migration procedures that are listed in this
document to add existing enclosures or hard disk drives to the new storage
subsystem configuration.
4. After successful migration, remove the storage enclosure with which you
started the new storage subsystem, if necessary.
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