Re: DMA limited to UDMA33

From: Simon L. Nielsen (none@simon--FreeBSD.org.lh.bsd-dk.dk)
Date: Tue 31 Aug 2004 - 14:24:07 CEST

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Date: Tue, 31 Aug 2004 14:24:07 +0200
From: "Simon L. Nielsen" <none@simon--FreeBSD.org.lh.bsd-dk.dk>
To: bsd-dk@bsd-dk.dk
Subject: Re: DMA limited to UDMA33

On 2004.08.31 14:10:29 +0200, Morten Winther wrote:

> Har fået en lille sej maskine med 2 SATA diske. Dog er jeg ikke glad for
> dette:
>
> ad4: DMA limited to UDMA33, non-ATA66 cable or device
> ad4: 156334MB <Maxtor 6Y160M0> [317632/16/63] at ata2-master UDMA33
> ad6: DMA limited to UDMA33, non-ATA66 cable or device
> ad6: 156334MB <Maxtor 6Y160M0> [317632/16/63] at ata3-master UDMA33
>
> Hvordan skal jeg tolke det?
>
> Hvordan tester jeg mine diske for at se hvor meget de kan trække?
>
> Jeg bruger FreeBSD 4.10-RELEASE-p2.

AFAIR kan det vaere pga. FreeBSD 4.X's ata driver ikke fuldt
understoetter SATA. Proev evt. at boote paa en 5.X (nok helst
5.3BETA2) CD og se om den ikke detecter dem korrekt uden fejl. Saa
kan du i hvert fald faa et hint om det er FreeBSD eller hardware.

Du kan lave en simpel disk benchmark med diskinfo -t ad4.

-- Simon L. Nielsen FreeBSD Documentation Team

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