Unable to upgrade Cyberoam to 16.05.3

Question

Hi, 
 I have a Cyberoam CR15iNG that is running SFOS 16.01.1 I'm trying to upgrade the firmware to HW-SFOS_16.05.3_MR-3.SF110-183, but it has not been possible. I'm trying to upload the new firmware to a slot currently occupied by SFOS 15.01.0 MR-3, which is not active. When I upload manually (via Google Chrome browser), the process seems to take place reaching 100%, but at the end, I get logged out of the device and when I log back in, the firmware has not been uploaded. If I click the download button in the "Latest Available Firmware" section, the download stops at 90-something percent. I've tried with version HW-SFOS_16.01.3_MR-2.SF110-265 too and similar things happen. 
 I've looked in the log and I see the warnings "Signature disk Usage reached 100% exceeding the threshold of 90%". I'm guessing that perhaps this is why the firmware upload is failing? 
 The output from the console is: 
 console> system diagnostics show disk Partition Utilization(%) =============================== configuration 21% content 84% Does anyone have any ideas? Thanks in advacnce.

lferrara · Accepted Answer

Hyder, 
 Officially CR15iNG is not an eligible device to run XG. 
 https://community.sophos.com/kb/en-us/122869 
 Try to format the XG using MR3 and import the configuration. 
 Regards

Hyder Khalil · Answer

Thanks Luk, 
 I rolled back to v15 and was able to upgrade from there. 
 Many thanks, 
 Hyder

Aditya Patel · Answer

HI, 
 The Minimum Requirement for XG is 25iNG and above, If the device is upgraded on 15iNG it is unsupported for some Hardware versions. 
 Provide me the Hardware version of your model Command Console > system dia sh ver 
 Only AM_02 and AM_03 are eligible but I would not advise otherwise.