Re: SAS v SATA interface performance

[Mark Lord <liml@rtr.ca>]

Oh, more fiction:

> Because SATA uses point-to-point connectivity, the scaling
> available with SAS controllers is not possible with SATA
> controllers. SATA drives must be connected on a one-to-one
> basis with the SATA connectors on the controller – i.e, a fourport
> SATA controller can connect up to four drives, an eight-port
> SATA controller can connect up to eight drives, etc. This means
> that the number of drives needed must be known prior to
> purchasing a SATA controller, or additional hardware costs will
> be incurred.

Ignoring port multipliers (hubs) again there.

A SATA hub can connect up to 31 drives to a single SATA port,
or up to 248 drives per 8-port PCI(X/e) controller card.

I don't know if anyone currently sells a 31-port multiplier, though.

Cheers