>>> On Thu, Nov 8, 2007 at 10:26 PM, in message <[EMAIL PROTECTED]>, Jim Bohnsack <[EMAIL PROTECTED]> wrote: -snip- > Nevertheless, Performance Toolkit reports Dasd response > time in the 1 ms range vs. the 30 ms. time I was used to in the spinning > Dasd days
Oh, the DASD still spins, just a lot faster, and more of it. The response time improvements are largely due to huge amounts of cache at various places along the data path. (Going from 3,600RPM to 15,000RPM disks didn't hurt either, but that's still mechanical movement which is glacial compared getting a cache hit.) Mark Post
