Hello, i have a question about Jay’s video Arch Linux: Full Installation Guide - A complete tutorial/walkthrough in one video!. In section 3c: Setting up the disk (UEFI with Encryption), when he creates the partitions, he creates 3 partitions: the first one for boot, the third one for root and home, but i do not know what is the second one.
The second partition (/dev/sda2 in his example) will be used for /boot, which has to be outside the encrypted LVM so that your OS can boot to prompt you for the LVM password. You can see this later in the video at around 58:30).
It was a bit tricky, because we created several partitions through the process, and the one wasn’t used until later. It may seem strange, but it’s the way to go from my experience.