Date: Fri, 18 May 2007 11:40:06 -0400 From: John Nielsen <lists@jnielsen.net> To: freebsd-stable@freebsd.org Cc: Tom Evans <tevans.uk@googlemail.com>, "Brian A. Seklecki" <bseklecki@collaborativefusion.com> Subject: Re: Native SATA vs. PATA-emulation - difference? Message-ID: <200705181140.06360.lists@jnielsen.net> In-Reply-To: <1179502492.41472.226.camel@soundwave.pgh.priv.collaborativefusion.com> References: <20070518090435.GB17241@hugo10.ka.punkt.de> <1179501936.1234.3.camel@zoot.mintel.co.uk> <1179502492.41472.226.camel@soundwave.pgh.priv.collaborativefusion.com>
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On Friday 18 May 2007 11:34:52 am Brian A. Seklecki wrote: > On Fri, 2007-05-18 at 16:25 +0100, Tom Evans wrote: > > On Fri, 2007-05-18 at 10:57 -0400, Brian A. Seklecki wrote: > > > On Fri, 2007-05-18 at 11:04 +0200, Patrick M. Hausen wrote: > > > > to UDMA33. I figure, they can safely be ignored? > > > > > > Only if there isn't some massive performance degradation. > > > ports/benchmarks/bonie++ can tell you that. > > > > > > As for the boot loader and your gmirror volumes; it's hard to say. > > > It's possible that there is some "absolute" or "non-relative" data in > > > there related to the device and the bus. > > > > > > Also: Maybe the geometry of the devices changes between modes? > > > > > > Send us the comparable dmesg(8) in both modes? > > > > > > ~BAS > > > > On my Intel ICH7 based laptop, switching from SATA/PATA emulation to > > SATA native mode changes the device of my HD from ad0 to ad4. > > > > YMMV > > right which I never understood absolute device number. you can choose > to do that in obsd/nbsd, but fbsd seems to psuedo magically do it. > reminds me Solaris. ~BAS If you don't want this behavior then remove "options ATA_STATIC_ID" from your kernel config. JN
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