SATA vs SCSI ...

[Don Lewis]

On 26 Jun, David Magda wrote:
> 
> On Jun 26, 2005, at 22:34, Marc G. Fournier wrote:
> 
>> In fact, looking at the SATA 2.x specs, each chanell there is rated at 
>> 300MB/s, which, again, if I could 'max out evenly', could seriously 
>> blow away the SCSI bus itself ...
>>
>> *If* I'm reading this right ... ?
> 
> Bus speed does not equal drive speed. And while yes, SATA is now 
> approaching SCSI in bus speed, it doesn't mean that SCSI isn't standing 
> still. A 640 MB/s bus was standardized in 2003 (though SATA is planned 
> to go to 600MB/s in 2007):
> 
> 	http://en.wikipedia.org/wiki/SCSI#Ultra-640

There's also Serial Attached SCSI (SAS), which shares uses the same
connector and cable as SATA, and has the same data transfer rate.  Dunno
if we support any SAS HBAs yet.  There are a few drives available, but
they seem to be pricey.  Dunno if FreeBSD supports any SAS HBAs ...