"and it achieves this by juggling the process between two seperate cache buffers, i believe"

See figures... 3A Normal I/O.....file management

3B Streaming I/O dual cache... staged processing....one cache holds while the other is processing.

3C Advanced streaming dual cache... task switching between the caches while processing....while concurrently reading or writing to memory.

All depends on what type of data I/O is needed.....Normal....streaming....or advanced streaming.

doni