Skip site navigation (1)Skip section navigation (2)
Date:      Mon, 20 Apr 1998 17:42:20 +0100
From:      Karl Pielorz <kpielorz@tdx.co.uk>
To:        Mike Smith <mike@smith.net.au>
Cc:        hardware@FreeBSD.ORG
Subject:   Re: best wdc0 flags ?
Message-ID:  <353B7AEC.D560BAD7@tdx.co.uk>
References:  <199804201626.JAA00670@dingo.cdrom.com>

next in thread | previous in thread | raw e-mail | index | archive | help
Mike Smith wrote:
> 
> > >> >  I tried those flags and noticed that it turned on 32-bit transfers for
> > >> >my wd0, resulting in a 20% increase in throughput. Out of curiosity, why
> > >> >aren't these flags included in GENERIC?
> > >>
> > >> Becuase they break operation of drives that don't support them.
> > >
> > >Do we have any examples of controllers that don't?
> >
> > I thought I did, but my oldest accessible drive (all 400MB of it from
> > 4 years ago) supports them.  The probe seems to handle any that don't.
> 
> OK.  Should we make it the default then?

Not a good idea... 32 bit transfers cause my nice shiny new Fireball 4.3Gb
SE's to barf (this is on a 440FX chipset 'embeded' controller).

A bit annoying - but probably expected from Quantum... <g>


Kp
--

To Unsubscribe: send mail to majordomo@FreeBSD.org
with "unsubscribe freebsd-hardware" in the body of the message



Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?353B7AEC.D560BAD7>