Date: Tue, 12 Mar 2002 18:12:36 +0000 From: ian j hart <ianjhart@ntlworld.com> To: Jan Srzednicki <winfried@student.uci.agh.edu.pl> Cc: stable@FreeBSD.ORG Subject: Re: ATA suggestion Message-ID: <3C8E4514.3FEDDE96@ntlworld.com> References: <Pine.GSO.4.44.0203121515350.20291-100000@student.uci.agh.edu.pl>
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Jan Srzednicki wrote: > > Hello, > > Recently I had some problems with my ATA drive; I was using the CMD 649 > chipset on auxilary controller card and my system halted several times > with errors on resetting the first drive (which was running in UDMA 100 > mode). I took a different controler (CMD 649 compatible, different > vendor), but that didn't work. I'm suspecting that the drive doesn't like > the UDMA 100 mode (although it says it does ;). It worked fine on 33 for > more than one year. > > The point is that I miss some option to downgrade the ATA mode - like I > want to set UDMA 66 for that drive, not UDMA 100 (maybe it would help), > but I couldn't find any option to do so. Is it hard to make some sysctl > setting which would force given mode (assuming the drive supports it of > course)? Some time ago I had a similar problem with a drive that was > detected as 66 on 40-wire cable (it was a slave drive; the master was an > ATAPI CDROM working in UDMA 33 mode, hw.ata.atapi_dma turned on). The > drive failed to work in DMA at all, and it dropped to PIO mode. I think > the solutian would be just forcing the 33 mode.. but.. > IIRC I've answered this once or twice before. Most hard disk vendors have a (DOS) tool you can use to set the UDMA level. -- ian j hart To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-stable" in the body of the message
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