Had the same issue, brand new controller 7210, won't go farther than "Reading configuration from default.cfg".
Used the provided method, worked and it took about 15 min.
The only issue now, is that during the boot I'm getting "Installing ancillary FS [ FAIL : Ancillary files are not present]" and "show version" will give me a warning message, see below :
(Aruba7210) #show vers
Aruba Operating System Software.
ArubaOS (MODEL: Aruba7210), Version 6.2.0.0
Website: http://www.arubanetworks.com
Copyright (c) 2002-2012, Aruba Networks, Inc.
Compiled on 2012-11-28 at 22:40:44 PST (build 36322) by p4build
ROM: System Bootstrap, Version CPBoot 1.2.1.0 (build 39183)
Built: 2013-07-26 04:57:47
Built by: p4build@re_client_39183
Switch uptime is 5 minutes 26 seconds
Reboot Cause: User reboot.
Supervisor Card
Processor (XLP416 Rev B1 (Secure Boot) , 800 MHz) with 7382M bytes of memory.
32K bytes of non-volatile configuration memory.
7744M bytes of Supervisor Card system flash.
Ancillary files are not present
*********************************************************************
* WARNING: An additional image upgrade is required to complete the *
* installation of the AP and WebUI files. Please upgrade the boot *
* partition again and reload the controller. *
*********************************************************************
Any ideas how to fix this ?
#7210