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The VT6421A is a single chip Serial ATA (SATA) host controller designed by VIA Technologies. It is a 128-pin QFP package. Description: The VT6421A is a single chip Serial ATA (SATA) host controller designed by VIA Technologies. It is a 128-pin QFP package. It supports up to four independent SATA ports and supports up to two independent IDE channels. It also supports RAID 0, 1, 0+1, JBOD and RAID 5. It has an integrated PCI-to-PCI bridge and supports up to four independent PCI buses. It also supports advanced power management features such as ACPI, S0/S1/S3/S4/S5 and PCI-E. Features: Supports up to four independent SATA ports Supports up to two independent IDE channels Supports RAID 0, 1, 0+1, JBOD and RAID 5 Integrated PCI-to-PCI bridge Supports up to four independent PCI buses Supports advanced power management features such as ACPI, S0/S1/S3/S4/S5 and PCI-E Supports ATA/ATAPI-6 and Serial ATA 2.6 Applications: The VT6421A is suitable for applications such as desktop PCs, workstations, servers, storage systems, and embedded systems. It is also suitable for applications such as RAID storage, NAS, SAN, and digital video recording. (For reference only)