Date: Sat, 26 Aug 2000 12:03:20 -0600 From: "Jamie Hermans" <freebsd@hermans.ab.ca> To: "'Doug White'" <dwhite@resnet.uoregon.edu> Cc: <hackers@FreeBSD.ORG> Subject: RE: Auto DMA vs. Manual DMA Settings... FBSD 3.51 Message-ID: <000801c00f87$ebb84ea0$641ba8c0@hermans.ab.ca> In-Reply-To: <Pine.BSF.4.21.0008252154450.24063-100000@resnet.uoregon.edu>
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Hi Doug... Actually, it is a proper UDMA66 cable (so agrees the Promise UDMA66 controller I was playing with a while back). But ... I'm not looking for UDMA66 speeds, like I mentioned - the motherboard only supports UDMA33 anyways. With a tip from another reply, I found this on Maxtor's website: (although my ASUS board is much newer than Oct 98, it's a start) Overview: Some older Ultra DMA 33 motherboards with older BIOS' (revision date 10/28/98 and older) have exhibited compatibility issues with Ultra DMA/66/100 drives. The symptom manifests itself as a system hangs at boot, and performance problems. On some motherboards the system does not properly check the UDMA setting returned by the drive. The end result is that the motherboard attempts to set itself up in an unsupported mode. These issues arise because of a bug in the system's BIOS, NOT a problem with the Maxtor hard drive. Some System's will also have performance problems due to the controller chipset. To eliminate this problem, Maxtor has developed the UDMAUPDT.EXE ... Jamie -----Original Message----- From: owner-freebsd-hackers@FreeBSD.ORG [mailto:owner-freebsd-hackers@FreeBSD.ORG]On Behalf Of Doug White Sent: Friday, August 25, 2000 10:57 pm To: Jamie Hermans Cc: hackers@FreeBSD.ORG Subject: Re: Auto DMA vs. Manual DMA Settings... FBSD 3.51 It may be that: a) your cable is damaged; b) your system is too noisy; c) your disks proclaim UDMA capability but can't actually deliver it. I'd suggest upgrading to a proper DMA66 cable and see if that helps. Doug White | FreeBSD: The Power to Serve dwhite@resnet.uoregon.edu | www.FreeBSD.org To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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