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On Thu, May 10, 2001 at 08:30:52PM +0930, Brett Lymn wrote:

> According to Chris Jones:
> >
> >Is it normal to expect write performance to be that much worse than
> >read performance?  Why would I have one disk that writes as fast as it
> >reads?
> >
>=20
> Same amount of cache memory on the disks?  Are the mode pages the same
> on both disks?  One managed to negotiate sync or something like that?

I have two identical Seagate Barracudas, only one of which writes
fast.  So they've got to have the same cache.  And I checked that they
were using the same speed, tagged queueing, etc.  So maybe the mode
pages are the only thing left.

If I weren't in the middle of a home remodel, I might write a utility
to play with mode pages -- it would be good for NetBSD to have.

Chris

--=20
---------------------------------------------------- chris@cjones.org
Chris Jones                                          Mad scientist at large
  www.netbsd.org www.postgresql.org www.schemers.org www.python.org

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