VT6421 eSATA+SATA+IDE VT6421CHIPSET PCI Host Controller VT6421 eSATA+SATA+IDE 1,VT6421CHIPSET PCI Host Controller2,2 internal ports, 1 external port(but the external port is sharedwith one of the internal port)3,Parallel ATA interface4, Provides two independent channels to connect up to two Serial ATA hard disk drives 5,Features independent 256-byte FIFOs per channel for host reads and writes 6, ...