On Tue, 16 Jul 2002, Andy Sy wrote: .. > Errr... are you saying that it is a complete lie? If not and SCSI is > indeed a shared bus model, how is it able to aggregate bandwidth from > multiple devices where ATA cannot?
SCSI is a PACKET BUS. SCSI commands are packets, so it can INTERLEAVE requests to different drives, since drives are a lot slower than controllers. It's like comparing the Sun UPA interconnect with, say, PCI. On the UPA bus, multiple I/O adapters can be talking to each other, they get packetized. With PCI or ISA, a single I/O adapter can "bus-master" the entire PCI bus and everyone else has to shut up. This is the reason why there's an interaction (in both Linux and Windows) between NVIDIA video cards and Aureal sound cards (like mine). The Aureal card bus-masters the PCI bus for too long (outside PCI spec) which causes hard hangs. --- Orlando Andico <[EMAIL PROTECTED]> Mosaic Communications, Inc. _ Philippine Linux Users Group. Web site and archives at http://plug.linux.org.ph To leave: send "unsubscribe" in the body to [EMAIL PROTECTED] To subscribe to the Linux Newbies' List: send "subscribe" in the body to [EMAIL PROTECTED]
