Error after installing ArchLinux

Question

Arch Linux

I install archlinux according to the official wiki ( https://wiki.archlinux.org/index.php/Beginners'_Guide ).
There are 2 disks in the system (sda - 160Gb, sdb - 500Gb), I select the MBR partition scheme, on sda I create 3 primary partitions - sda1 (50Gb), sda2 (50Gb), sda3 (40Gb).
I format sda1, sda2 in ext4, I leave sda3 under swap commands:

# mkswap /dev/sda3
# swapon /dev/sda3

After executing all the commands from the wiki, I do the reboot command.
As a result, the system boots up with the following errors:

As far as I understand, there are some problems with swap.

Answer 1

Obviously, you have Syslinux, and you did not touch the default config /boot/syslinux/sylinux.cfg, and in it, by default, the root section refers to /dev/sda3. Hence the problems.