<carlosreimer(at)terra(dot)com(dot)br> writes:
> I would like to know if my supposition is right.
> Considering an environment with only one hard disk attached to a server, an
> initial loading of the database probably is much faster using an IDE/ATA
> interface with write-back on than using an SCSI interface. Thats because of
> the SCSI command interface overhead.
I *seriously* doubt that.
If you see a difference in practice it's likely got more to do with the
SCSI drive not lying about write-complete ...
regards, tom lane