Re: disk arms (was RE: Tips for user ASP)

I was under the impression that there is some benefit from asynchronous
writes with mirrored sets. Which ever set is free gets the first write, the
other follows when it can. More queues to handle the requests.

At 01:18 PM 7/1/02 -0600, you wrote:
>On Mon, 1 Jul 2002, R. Bruce Hoffman, Jr. wrote:
>
> > > > Reads are about the same... the real performance boost on mirroring
> > comes
> > > > from writes.
> > >
> > > I believe this is incorrect.  On a mirrored set the write command must be
> > > completed twice, whereas a single read operation on either side of the
> > > mirrored pair will fulfill a read request.  Thus reads should be faster
> > > and writes much slower.
> >
>
>James Rich