ANDU paused due to Autoboot the image failed. File system not recognized (-29)

An ANDU operation pauses with a message similar to:

cluster_CLI::> cluster image show-update-progress 
                                              Estimated         Elapsed
Update Phase         Status                   Duration        Duration
-------------------- ----------------- --------------- ---------------
Pre-update checks    completed                00:10:00        00:00:35
Data ONTAP updates   paused-on-error          01:23:00        00:37:18
 
Details:
 
Node name            Status            Status Description
-------------------- ----------------- --------------------------------------
node-01         waiting
node-02         failed            Error: Node "node-02" is not in
                                       "waiting for giveback" state.
                                       Action: Use the "storage failover
                                       show" to verify that node
                                       "node-02" is in one of the
                                       following states: "waiting for
                                       giveback" or "connected".
4 entries were displayed.
 
Status: Paused - An error occurred in "Data ONTAP updates" phase. The update cannot continue until the error has been 
                 resolved. Resolve all issues, then use the "cluster image resume-update" command to resume the update

From the SP logs of the affected node, a failure to boot the new default image is seen:

Boot Loader version 4.3
Copyright (C) 2000-2003 Broadcom Corporation.
Portions Copyright (C) 2002-2014 NetApp, Inc. All Rights Reserved.
CPU Type: Intel(R) Xeon(R) CPU           C3528  @ 1.73GHz
Starting AUTOBOOT press Ctrl-C to abort...
File system not recognized (errcode=-29)
Trying to boot from alternative path:fat://boot0/X86_64/kernel/primary.krn
Autoboot the image failed. File system not recognized (-29)

The node will be at the LOADER> prompt when logged in through the SP.