Serial ATA - Page 2
- Desktop Storage Interfaces
- ATA Device Connectivity
Parallel ATA allows up to two devices to be connected to a single
port using a master / slave communication technique. Both devices are daisy-chained
together via one ribbon cable that is an unterminated multidrop bus.
The standard parallel ATA software and device driver access the
Serial ATA subsystem in exactly the same manner as parallel ATA and will function
correctly. For Serial ATA however, the software views the two devices as if
they were masters on two separate ports. The drive interface section of the
host adapter uses a new design that converts the normal operations of the software
into a serial data / control stream. The Serial ATA structure connects each
of the two drives with individual cables in a point-to-point fashion.