Seagate Barracuda 7200.9 500GB (ST3500841A)

The main feature of this drive is that the manufacturer deliberately slowed down its read/write heads, obviously to make the drive quieter at work. Otherwise, it is a standard representative of the Barracuda 7200.9 series with an 8MB cache buffer.

Seagate Barracuda 7200.9 500GB (ST3500841AS)

The school of barracudas ends in the Barracuda 7200.9 model with a SATA interface and a small cache buffer. Considering the abundance of models we have to deal with, you can follow this link to compare their specs easily.