Date: Fri, 1 Oct 2004 20:31:23 +0930 From: Tristan <tris@infoeng.flinders.edu.au> To: freebsd-current@freebsd.org Subject: Re: ad0: TIMEOUT - WRITE_DMA retrying (2 retries left) LBA=xxx Message-ID: <20041001203123.65b94c6f@rhino> In-Reply-To: <415CAF59.5070107@FreeBSD.org> References: <20041001093515.5cd51b2d@rhino> <20041001005227.GA28811@electra.cse.Buffalo.EDU> <20041001102816.5b14b79f@rhino> <415CAF59.5070107@FreeBSD.org>
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On Thu, 30 Sep 2004 19:14:01 -0600 Scott Long <scottl@FreeBSD.org> wrote: > Tristan wrote: > > On Thu, 30 Sep 2004 20:52:27 -0400 > > Ken Smith <kensmith@cse.Buffalo.EDU> wrote: > > > >>On Fri, Oct 01, 2004 at 09:35:15AM +0930, Tristan wrote: > >> > >> > >>>FreeBSD 6.0-CURRENT with GENERIC kernel built 27th Sep. > >>>On a SunBlade 100 I see these messages regularly when > >>>dma is enabled. The messages go away when I either use > >>>atacontrol to set the mode to PIO4 or set hw.ata.ata_dma to 0 > >>>I do get data corruption on the disk if left in DMA mode. > >> > >>Just FYI my primary test machine is a SunBlade 100, it seems to > >>be doing OK with a kernel built from this morning's source. I've > >>been doing most of my builds from an NFS server though, I'll do > >>a check with a full buildworld which will use the local drive more. > >> > >> > >>>ad0: 14594MB <ST315310A/3.28> [29651/16/63] at ata2-master UDMA66 > >>>acd0: CDRW <LTN486S/YSU1> at ata2-slave PIO4 > >>>ata3-master: DMA limited to UDMA33, non-ATA66 cable or device > >>>ad1: 39266MB <IBM-DTLA-305040/TW4OA60A> [79780/16/63] at ata3-master UDMA33 > >>>Mounted root from ufs:/dev/ad0a. > >> > >>Is the data corruption spread across both drives, or just ad1? That > >>message about the cable or device being limited could be a clue. > > > > > > nope, its only on ad0. ad1 seems to be fine, however it is hardly used. > > What happens if you remove the CDROM from the ad0 chain? > > Scott I still get the errors with the CDROM removed. Perhaps the cable needs replacing? thats what these symptoms say to me. tris
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