Date: Thu, 04 Apr 2002 19:38:59 -0500 From: "Jud " <jud@operamail.com> To: <culverk@alpha.yumyumyum.org>, <dnelson@allantgroup.com> Cc: <george@galis.org>, <Kevin_Stevens@pursued-with.net>, <nl3481@wi.rr.com>, <questions@FreeBSD.ORG> Subject: Re: EIDE drive performance improvements Message-ID: <20020405003859.29392.qmail@operamail.com>
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----- Original Message -----
From: Kenneth Culver <culverk@alpha.yumyumyum.org>
Date: Thu, 4 Apr 2002 18:39:12 -0500 (EST)
To: Dan Nelson <dnelson@allantgroup.com>
Subject: Re: EIDE drive performance improvements
> > You should be able to, depending on how the controller presents itself
> > to the system. The asr driver looks like a scsi disk to the system, and
> > can accept 255 tagged commands. I haven't seen my array go above 60,
> > but it does work.
> >
> > --
> Yeah, but we're talking about an ATA array here, I'm not sure that it
> would work the same.
Some RAID controllers for ATA/IDE drives look like a
single SCSI device to the system. I don't think that's
true of my Promise onboard chip (a software rather than a
hardware controller), because I have no SCSI support in
the kernel but the array works fine.
Don't think I need much more tuning anyhow - my last "make
world" took a shade under 20 minutes. :)
Jud
--
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