E6430 and mSATA again

Hi,

Two months ago , planning to format my e6430 with the intention of moving to Windows 10 , I tried to install a mSATA slot WWAN . A Samsung 840 124GB .

In the boot options appeared the option to start from mSATA . I unplugged mSATA , and restarted everything with normal hdd .

Yesterday I cloned the contents of the system disk on mSATA and I did the same thing again but was NOT possible to display the disk mSATA among the boot options.

When I made the test two months ago I had an old BIOS . Yesterday I updated everything and even the bios has passed the latest version 16.

I know that this notebook  not officially supports mSATA but as I have done tests and it worked. I bought an mSATA and now I do not know what to do . Dell has removed support mSATA with one of the latest BIOS ? Some idea?