Upgrading from 7.2.4 or earlier versions
Upgrading directly from 7.2.4 or earlier versions to 7.2.9 is not supported. Neither is upgrading directly from 7.0.11 or earlier to 7.2.9.
To upgrade:
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Check the recommended upgrade path using the Upgrade Path Tool.
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If upgrading from the GUI, upgrade to each firmware version in the upgrade path using the direct upgrade option. See limitations on GUI firmware upgrade does not follow the recommended upgrade path in previous versions
In the event the system hangs due to following an unsupported upgrade path to version 7.2.9, boot up the backup partition from the BIOS, and follow the instructions above to upgrade again.