WIP: ATA to CAM integration
mav at mavhome.dp.ua
Fri Jun 5 16:58:33 UTC 2009
Matthew Dillon wrote:
> It's unclear to me what this means. Can we use NCQ to queue multiple
> commands to multiple ports behind a single port multiplier in parallel
> or can't we? It's very confusing.
As I have said, without controller FIS Based Switching capability it is
impossible. FBS defines separate memory areas for controller, to track
there state of each drive behind PM. Without it, only one drive can be
active at a time, as controller will not be able to track when each
drive is able to receive next command..
More information about the freebsd-arch