Date: Mon, 05 Jun 2000 20:12:11 -0400 From: unix@usww.com To: freebsd-questions@FreeBSD.org Subject: ATA 66 UDMA MODE 4 w/Amptron 3748LMRT Message-ID: <393C41DB.6084DE8D@usww.com>
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The Amptron 3748 is capable of UDMA4 but I noticed that the man ata only
support 33. dmesg output also show atapci0: <SiS 5591 ATA33
controller>... The bio shows mode 4. I have built several of these
systems with Maxtor 20 gig and FreeBSD 4.0, assuming that it would use
mode 4. To my suprise it does not. Is there a patch/fix/update that
anyone knows of. Or will 4.1 allow mode 4.
# man ata
...snip...
AMD 756 Ultra DMA 66 (UDMA4), 66 MB/sec
HighPoint HPT366 Ultra DMA 66 (UDMA4), 66 MB/sec
Promise Ultra-33 Ultra DMA 33 (UDMA2), 33 MB/sec
Promise Ultra-66 Ultra DMA 66 (UDMA4), 66 MB/sec
>>>> SiS 5591 Ultra DMA 33 (UDMA2), 33 MB/sec <<<
VIA 82C586 Ultra DMA 33 (UDMA2), 33 MB/sec
VIA 82C686 Ultra DMA 66 (UDMA4), 66 MB/sec
...snip...
Ben Bentsen
USWW Systems
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