Ex4100 - OS5 - Full test - System Diagnostics - Test in Process never ends (8 hours)

Hello,
WD My Cloud Ex4100.
I launched OS5 / Settings Utilities / Full test.
Now, the System Diagnostics - Test in Process bar seems to be stuck at around 90% after 8 hours.
The WD My Cloud Ex4100 seems inactive / CPU is 0%
My Ex4100 is new, there is no data in the server.
But I don’t want to use it without making this test first.
Please advise.
Thank you.

More details hereunder:
I just bought WD My Cloud Ex4100 56 to (4x14to).
Did full update: OS5, firmware
Everything working fine.
I launched Settings Utilities / Full test.
“System Diagnostics” - Test in Process seems to be stuck at around 90% after 8 hours.
The WD My Cloud Ex4100 seems inactive / CPU is 0%
I rebooted
Launched again Settings Utilities / Full test.
And again “System Diagnostics” - Test in Process seems to be stuck at around 90% after 8 hours. The WD My Cloud Ex4100 seems inactive / CPU is 0%.

Hi,

Please refer to the following KBA: https://support-en.wd.com/app/answers/detail/a_id/27431