I decided to try the ap image preload feature ahead of a controller code upgrade. I attempted to use it on a M3mk1 with 4 APs in a test group. It failed. It also says (in the GUI) that to retry it, I need to reload the controller (WAT?). Here's what I see in the CLI now. Any idea what result code 255 means?
(aruba4) #show ap image-preload status all
AP Image Preload Parameters
---------------------------
Item Value
---- -----
Status Active
Mode Specific APs
Partition 1
Build 51619
Max Simultaneous Downloads 10
Start Time 2015-11-09 13:28:43
AP Groups Listed for Preload
----------------------------
AP Groups
---------
IT
AP Names Listed for Preload
---------------------------
AP Names
--------
xxxxxxx
AP Image Preload AP Status Summary
----------------------------------
AP Image Preload State Count
---------------------- -----
Preload failed 4
TOTAL 4
AP Image Preload AP Status
--------------------------
AP Name AP Group AP IP AP Type Preload State Start Time End Time Failure Count Failure Reason
------- -------- ----- ------- ------------- ---------- -------- ------------- --------------
xxxxxxx xx xxx.xx.xxx.xx 125 Preload failed 2015-11-09 13:48:37 2015-11-09 13:48:52 5 Flash image upgrade failed: Result code 255
xxxxxxx xx xxx.xx.xxx.xx 105 Preload failed 2015-11-09 13:48:38 2015-11-09 13:48:53 5 Flash image upgrade failed: Result code 255
xxxxxxx xx xxx.xx.xxx.xx 125 Preload failed 2015-11-09 13:48:38 2015-11-09 13:48:52 5 Flash image upgrade failed: Result code 255
xxxxxxx xx xxx.xx.xxx.xx 125 Preload failed 2015-11-09 13:48:37 2015-11-09 13:48:52 5 Flash image upgrade failed: Result code 255