>>>>> "Daniel" == Daniel Carosone writes:

 Daniel> The main reason is that there's only one outstanding
 Daniel> operation to the disk at once.

 >> This isn't true, most modern IDE hard drive have the tagged
 >> queueing ability.

 Daniel> I chose my words carefully.

 Daniel> There is only one outstanding command - even if the drive
 Daniel> happens to support tagged queuing, we don't use it, as I
 Daniel> went on to say in the same email.

  Yes, you are right. It was unclear to me, which context your
  statement applies to.

Oleg