On Saturday, August 31, 2002, at 08:54 PM, dougkramer wrote: > --- In logic-users@y..., Murray McDowall <murraymc@m...> wrote: >> -- PCI bus (32 bit wide @ 33 MHz)is 132 MByte/second >> -- Firewire is 400 Mbit per second nominally but will not deliver >> anything >> close to this to a firewire hard-drive -- typically tops out at 30 >> MByte >> per second. > > Why do firewire hard drives top out at 30 MByte/sec? > What gives with firewire being so slow? > > -Doug in all fairness, 30MB/sec is 240Mb/sec. That number doesn't look as bad as the former equivalent. However, I have seen drives spec'ed and tested at 40MB/sec, almost reaching top FW bandwidth performance. The problem with FW drives is that they are all IDE with a FW bridge/controller. This is were you lose throughput. It is this area that will be worked on to make FW drives competitive to other standards. -otto ------------------------------------------------------------------------ ------------------- Otto Gygax - Audio, Computer, Networking Engineering / Percussion otto@... / Philomath, Oregon