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>
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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
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