HD died?

Most likely. However, 'cause I'm not familiar with that Intel technology -- better get another opinion. Hope you have restorable or clonable backup image[s] on some external device[s].

We can not know if it appears or does not appear in the bios. Does it ?

You have 2 drives showing in the bios, a Corsair SSD and a 1 TB Samsung hard drive. How many drives should be showing up ?

If it worked yesterday and doesn`t work today you`ll have to check it on another machine to know for sure it`s dead.

Does the Samsung 931 GB hard drive show up in disk management ?

Post a shot.

My second hard drive no longer appears in the windows.

Do you mean it on "My Computer"?

And when I'm starting the windows appears this:
Disk Offline.

Try looking at Computer Management > Disk Management, you should see that HDD Disk #, right click on its Disk #, choose Online.