Date: Wed, 19 Jun 2002 06:25:52 -0700 (PDT) From: Jamie Bowden <ragnar@sysabend.org> To: Matthias Andree <matthias.andree@gmx.de> Cc: freebsd-stable@freebsd.org, Soeren Schmidt <sos@freebsd.dk> Subject: Re: ATA Atapi 4.6 Release Message-ID: <Pine.BSF.4.10.10206190615450.69260-100000@moo.sysabend.org> In-Reply-To: <m3n0tsr4lb.fsf@merlin.emma.line.org>
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On Tue, 18 Jun 2002, Matthias Andree wrote:
:Which leaves you with the recommendation:
:
:When running FreeBSD 4.6, put these lines in your /boot/loader.conf:
Use /boot/loader.conf.local instead, according to the docs, which works
fine.
:hw.ata.wc="0"
:hw.ata.tags="0"
:hw.ata.ata_dma="1"
:hw.ata.atapi_dma="1"
:There are a couple of drives that do support tagged queueing, more than
:FreeBSD will even try TQ on. I have heard of no reports of broken TQ on
:any other drive than the original IBM DJNA, and that I could not verify
:myself.
I tried this on my laptop (Dell Latitude C810) running -stable just for
kicks. It works fine, but things get slooooooooow. I have since commented
the lines out, and everything is back to its zippy normal.
Just out of curiousity, does the new ATA driver support removable devices
in the Latitude media bay? That would be neato. The ATACONTROL(8)
manpage would seem to suggest it, but it's not clear.
BTW:
This is from ATA(4):
To see the devices' current access modes, use the command line:
sysctl hw.atamodes
which results in the modes of the devices being displayed as a string
like this:
hw.atamodes: dma,pio,---,pio,dma,---,dma,---, (--- = no device)
And from the command line:
9:20am ghast /home/jamie %runas sysctl hw.atamodes
sysctl: unknown oid 'hw.atamodes'
So something isn't right here.
Jamie Bowden
--
"It was half way to Rivendell when the drugs began to take hold"
Hunter S Tolkien "Fear and Loathing in Barad Dur"
Iain Bowen <alaric@alaric.org.uk>
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