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Date:      Fri, 20 Oct 2000 15:26:57 +0200
From:      "Jose M. Alcaide" <jose@we.lc.ehu.es>
To:        Greg Lehey <grog@lemis.com>
Cc:        freebsd-stable@FreeBSD.ORG
Subject:   vinum and ATA-66 (was: Via KT133 chipset and DMA diskaccess)
Message-ID:  <39F04821.BA400C50@we.lc.ehu.es>
References:  <E13lWjn-000LqP-00@post.mail.nl.demon.net> <39EC7AAA.642D480@we.lc.ehu.es> <20001017200216.D1250@sydney.worldwide.lemis.com>

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Greg Lehey wrote:
> >
> > The MB is a Gigabyte GA-7ZX. However, I had problems when the CD-ROM
> > was connected as primary slave: it was not detected, and the ATA probe
> > routine reported that the cable is not ATA66 compatible (but it
> > *is*).
> 
> No, ATA-66 can only connect one device.
> 

I read the ata(4) man page and indeed it says that mixing UDMA4 and
non-UDMA4 devices on the same ATA channel is not recommended. Obviously
I bumped into this problem.

BTW, I plan to purchase a Promise Ultra66 controller for connecting
four ATA-66 disks and configuring a RAID-5 device using Vinum (4.1.1-STABLE).
Greg, What do you think about this configuration? Should it perform well?
The machine has a Pentium Pro 180 CPU and the 440FX chipset. I want to
use it for setting up yet another FreeBSD mirror.

Cheers,
-- JMA
****** Jose M. Alcaide  //  jose@we.lc.ehu.es  //  jmas@FreeBSD.org ******
** "Beware of Programmers who carry screwdrivers" --  Leonard Brandwein **


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