The 491840-001 is a backplane board designed for the HP ProLiant ML370 G6 and DL370 G6 server models. It serves as the interface connecting the drive bays (up to 6 LFF drives) to the rest of the server system, often including the RAID controller.
Highly recommend for any data center expansion project.
A workhorse for our production environment.
Price to performance ratio is unbeatable right now.