Kevin Brown <[EMAIL PROTECTED]> writes:
> In the case of pure random reads, you'll end up having to wait an
> average of half of a rotation before beginning the read.

You're assuming the conclusion.  The above is true if the disk is handed
one request at a time by a kernel that doesn't have any low-level timing
information.  If there are multiple random requests on the same track,
the drive has an opportunity to do better than that --- if it's got all
the requests in hand.

                        regards, tom lane

---------------------------(end of broadcast)---------------------------
TIP 5: Have you checked our extensive FAQ?


Reply via email to