Re: Detection of SATA drives on 5.2.1-RELEASE-p8

From: Søren Schmidt (sos_at_DeepCore.dk)
Date: 06/29/04

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    Date: Tue, 29 Jun 2004 16:57:30 +0200
To: "Fred N. Souza" <fred@freebsdbrasil.com.br>

    Fred N. Souza wrote:
    > Hello,
    >
    > We have a box running 5.2.1-RELEASE-p8 on a SATA disk. However, at
    > boot FreeBSD recognizes it as UDMA100, and I've been told the correct
    > should be something like UDMA150, but I don't know if that's true.
    >
    > Anyway, is there a way for me to tell whether it's running at 150 or
    > 100? The weird part is that apart from the name and addressing data,
    > FreeBSD recognizes the SATA disk just like the IDE we have on the very
    > same box. Attached is the dmesg for that box, note how both ad0 and
    > ad2 are shown as UDMA100..

    You need to go -current to get the reported interface corrected.

    Anyhow, the SATA interface always runs at 150MB/s. However if your disk
    is not a native SATA disk but one with a PATA->SATA dongle on it, the
    speed between the dongle and the disk wil be whats reported and
    limitting your transferrates... 

    -- 
-Søren
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