Matthew Dillon dillon at
Sat Nov 20 10:46:14 PST 2004

:Sascha Wildner wrote:
:> Hello,
:> what's the state of SATA support in DFly? For my SATA disk I get:
:> ad4: DMA limited to UDMA33, non-ATA66 cable or device
:> ad4: 190782MB <WDC WD2000JD-55HBB0> [387621/16/63] at ata2-master UDMA33
:This may not strictly be a SATA problem. I've been having that error message this 
:week with a 30gb PATA drive, though it only started after a BIOS upgrade to my mobo 
:which added SATA features. This problem also causes a read error "resetting device" 
:message to show up during normal disk activity, and a far less frequent reset because 
:of a write error.

    You can ignore the cable warning for the SATA drivers, it's because right
    now the ATA driver is not making the distinction and probing a bit that
    is not relevant to SATA.  The speed is also not relevant, you will get
    the full speed out of it.

    Re: your occassional read and write errors.  I tracked Jonathon
    McKitrick's remaining problems to his clock going crazy and so I am also
    going to ask you to monitor your clock too.

    So, run that ATA Patch #6 I posted yesterday, and also run the clock
    munging detector patch 'Patch to detect 8254 timer munging in BIOS
    calls...'.   I would like to commit the ATA and the timer stuff tomorrow
    (hopefully I can run down Andreas's 1-hour-off report today).

					Matthew Dillon 
					<dillon at xxxxxxxxxxxxx>

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