The H5-25473-00 is a controller board for the LSI SAS 2008 storage controller. It contains a SAS 2.0 PCI Express host adapter chip, two external x4 Mini SAS ports, two internal x4 Mini SAS connectors, one ROMB port, and one EEPROM. The controller board is designed to support SATA and SAS 6Gb/s hard disk and solid-state drives. It is used in applications where large data sets and superior performance are required. The board is compatible with RAID levels 0, 1, 10 and 5.