Date: Fri, 17 Dec 1999 16:49:43 -0600 From: "Alejandro Ramirez" <ales@megared.net.mx> To: <freebsd-questions@FreeBSD.ORG>, "Dale Hagglund" <rdh@best.com> Subject: RE: when is it safe to use the 0xa0ffa0ff disk flags? Message-ID: <013401bf48e1$04754920$d2630a0a@megared.net.mx> References: <Pine.BSF.4.21.9912161648580.1526-100000@dogma.freebsd-uk.eu.org> <01ae01bf47e7$08293900$d2630a0a@megared.net.mx> <867lidxtoh.fsf_-_@ponoka.battleriver.com>
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Hi,
You will have to try them, if you dont succed, you can always boot with
"/kernel.old", and restore your old kernel.
BTW If your disks are Quantum Fireballs, and yous system its not to old, you
shouldnt have any problem.
Have Fun...
Ales
----- Original Message -----
From: Dale Hagglund <rdh@best.com>
To: <freebsd-questions@FreeBSD.ORG>
Sent: Friday, December 17, 1999 1:18 PM
Subject: when is it safe to use the 0xa0ffa0ff disk flags?
> "Alejandro Ramirez" <ales@megared.net.mx> writes:
>
> > Are you refering to the "0xa0ffa0ff" flags???, this flags are for
> > improve performance by enabling DMA use, enable the multi-sector I/O
> > and the 32BIT I/O modes to IDE Disks.
>
> How does one know if it's safe to apply those those particular flags
> to one's system? If they'll speed up disk activity, I'm all in favour
> of them, but I don't want to trash my disks by mistake.
>
> I'm using 3.2-RELEASE with a kernel built to support ipfw and the bpf
> stuff. My disks are Quantum Fireballs, a ST2.1A and KA9.1
> respectively.
>
> Dale.
>
>
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