ODA: Not Able To Reimage back to 12.1.2.5 After upgrade to 12.1.2.6 with Hang On "Loading usb-storage driver" (Doc ID 2149335.1)

Last updated on JUNE 22, 2016

Applies to:

Oracle Database Appliance Software - Version 12.1.2.5 to 12.1.2.6 [Release 12.1]
Information in this document applies to any platform.

Symptoms

Upgraded X5-2 from 12.1.2.5 to 12.1.2.6. Then after testing attempt to re-image the box back to 12.1.2.5

During attempts to re-image the ODA on the original 12.1.2.5 the second node did complete the re-image to 12.1.2.5
However the first node re-image failed after several attempts.
During reimage of ODA from 12.1.2.6 to 12.1.2.5 the process stops at

   "Loading usb-storage driver"

This screen hangs during the OS boot process - no further progress is possible

Changes

 New installation upgraded from 12.1.2.5 to 12.1.2.6.
After testing on 12.1.2.6 an attempt to re-image to the lower 12.1.2.5 failed with a hang.

Cause

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