Date: Sat, 21 Oct 2006 23:57:13 -0500 From: Josh Paetzel <josh@tcbug.org> To: freebsd-questions@freebsd.org Subject: Re: non-ATA66 cable? Message-ID: <200610212357.13244.josh@tcbug.org> In-Reply-To: <b34be8420610212146h7c24a849m6d888c2d2f4ac95e@mail.gmail.com> References: <726CFBB1-2BB1-42A5-8A8F-96B880D316A3@HiWAAY.net> <b34be8420610212146h7c24a849m6d888c2d2f4ac95e@mail.gmail.com>
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On Saturday 21 October 2006 23:46, Juha Saarinen wrote: > On 10/22/06, David Kelly <dkelly@hiwaay.net> wrote: > > Dell PowerEdge 400SC, 6.2-PRERELEASE (altho this is an old issue) > > > > dmesg says: > > > > acd0: DMA limited to UDMA33, controller found non-ATA66 cable > > acd0: DVDR <LITE-ON DVDRW SOHW-1633S/BS0K> at ata1-master UDMA33 > > cd0: 33.000MB/s transfers > > > > The controller is properly probed as, "atapci0: <Intel ICH5 > > UDMA100 controller>" > > > > This DVD isn't writing discs as fast as other brands on other > > machines and OS's (such as MacOS X). Lite-On has a newer firmware > > that I have not tried. But first was checking for any sort of > > errors or irregularities and came across this mismatch. > > > > Lite-On says "Supported transfer mode : PIO mode 4, DMA mode 2 > > and Ultra DMA mode 2", so is there something I should do to my > > FreeBSD to make this device happier? > > Try a different cable? It's not going to come up faster than UDMA33....and even if it did UDMA33 is far faster than a DVD burner. What sort of write performance are you getting? -- Thanks, Josh Paetzel
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