3 of 24

Revision 4.2

July 29, 2005

Confidential

VSC7177

Data Sheet

Application Example

The VSC7177 allows two Serial ATA hosts to access one Serial ATA drive. Figure 1 shows a common application

where redundant I/O controllers in disk arrays have multiplexed access to single-port Serial ATA disk drives.

Figure 1. Serial ATA Backplane Application

"Tailgate" Board

Backplane

VSC7177

I/O Controller A

I/O Controller B

Serial ATA Drive

(1 of n)