Messages in this thread | | | Date | Tue, 20 Mar 2001 19:52:08 -0500 (EST) | From | Shawn Starr <> | Subject | Re: CDROM and harddisk fighting over DMA |
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Some CDROMS can do this, My old Acer 12x cdrom was fighting with DMA with my new Fujitsu drive, I disabled the cd-rom and no more DMA errors ;-)
You might also be able to fix this by rearranging the CD-ROM and drives: move the CD-ROM off the HD's IDE chain and put it separate (if its not already).
Shawn.
On Tue, 20 Mar 2001, Wouter Verhelst wrote:
> (I'm not subscribed to linux-kernel, so please CC any answers. TIA) > > Hello > > Since I bought my new harddisk (a Maxtor 40GB of about a half year old > now), I've had errors over my console like this: > > hda: timeout waiting for DMA > ide_dmaproc: chipset supported ide_dma_timeout func only: 14 > hda: irq timeout: status=0x58 { DriveReady SeekComplete DataRequest } > > hda is my harddisk. The CDROM was first connected to hdb, but I changed > that to hdc, trying to get rid of these errors. This did not resolve the > issue. > After playing around a bit, I found out that these errors occur when both > the CDROM and the harddisk are being accessed at the same time (well, > almost; it's not an SMP system ;-). I managed to fix it by disabling DMA > on the harddisk, using hdparm. Disabling DMA on the CDROM, by contrast, > did not resolve the issue. > > However, as this slows down my data throughput speed quite drastically, > I'd like to do this differently. > > I first posted this to comp.os.linux.setup, but did not get any useful > information. I believe it's not some misconfiguration from my side, so I > sent this here since this mailinglist is listed as relevant mailinglist > for the IDE subsystem; however, if this is the wrong place to ask, please > redirect. > > -- > wouter dot verhelst at advalvas in belgium > > Real men don't take backups. > They put their source on a public FTP-server and let the world mirror it. > -- Linus Torvalds > > - > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > Please read the FAQ at http://www.tux.org/lkml/ > >
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