Date: Thu, 25 Oct 2001 08:16:47 -0400 From: Jim Freeze <jfreeze@freebsdportal.com> To: Erik Trulsson <ertr1013@student.uu.se> Cc: questions@freebsd.org Subject: Re: UDMA66 - One cable, two modes? Message-ID: <20011025081647.A14542@freebsdportal.com> In-Reply-To: <20011025121913.A5846@student.uu.se>; from ertr1013@student.uu.se on Thu, Oct 25, 2001 at 12:19:13PM %2B0200 References: <20011025115305.E240-100000@howie.ncptiddische.net> <20011025121913.A5846@student.uu.se>
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On Thu, Oct 25, 2001 at 12:19:13PM +0200, Erik Trulsson wrote: > On Thu, Oct 25, 2001 at 12:00:43PM +0200, Nils Holland wrote: > > > > Oct 24 15:56:31 howie /kernel: ad0: 12416MB <WDC AC313000R> [25228/16/63] at ata0-master UDMA66 > > Oct 24 15:56:31 howie /kernel: ata0-slave: DMA limited to UDMA33, non-ATA66 compliant cable > > Oct 24 15:56:31 howie /kernel: ad1: 8063MB <FUJITSU MPE3084AE> [16383/16/63] at ata0-slave UDMA33 > > Oct 24 15:56:31 howie /kernel: acd0: CDROM <ATAPI CDROM> at ata1-master using PIO4 > > Oct 24 15:56:31 howie /kernel: acd1: CD-R <CR-4801TE> at ata1-slave using PIO3 > > > If you want to use UDMA66 you are not allowed more than one drive per > cable. It is the fact that you have two drives connected to the same cable > which makes the cable not UDMA-66 compliant. This is not FreeBSD specific > but rather an effect of how ATA works. If you want to run both drives at > UDMA-66 speeds you will have to get an extra controller. > Hmmm.. I have heard this before, but my system and cable seems to support two: ad0: 29311MB <Maxtor 5T030H3> [59554/16/63] at ata0-master UDMA100 ad1: 9787MB <WDC WD102AA> [19885/16/63] at ata0-slave UDMA66 -- Jim Freeze No comment at this time. www.freeze.org To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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