> I'm dedicated to continue working on the problem, I just need to advice from the linux community. I've tried different I/O schedulers such as noop and anticipatory and I'm studying the ide-dma code but still lost to where this is happening. drivers/ide is pretty much obsolete - so what you are seeing is doubly odd. Most stuff now is using the newer drivers/ata code which can support SATA, NCQ etc unlike the old codebase. One thing to check would be whether using the drivers/ata code shows the same problem. Alan -- To unsubscribe from this list: send the line "unsubscribe linux-ide" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html