I double checked the 5.37 source code and the hard drive is not in the
smartctl -t short /dev/sda
smartctl -a /dev/sda -d ata >ST3500820AS.txt
smartctl -t short /dev/sdb
smartctl -a /dev/sdb -d ata >ST3500320AS.txt
The two drives supposed to be identical, but there is something wrong
with the firmware and that's why the model names are different.
Seagate Barracuda 7200.11 500GB 32MB SATAII Hard Drive