I never got dma timeouts running 2.2.19 before installing my promise ata66 card and CDRW. Now i get them whenever disk usage is up and what ends up happening is none of my drives running in dma mode. Is this some effect of enabling the UDMA features of the promise card ? If i compiled the kernel without these UDMA features on the promise card, would it fix the problem? I have 5 drives now, 3 are UDMA4 drives and 1 (secondary slave) is a cdrom using DMA. I can move this to the secondary channel of the promise card if that will help. Is there any way to predict if you're going to have trouble with DMA's? - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/