On 12/03/2009 09:19 AM, Tejun Heo wrote: > On 12/03/2009 02:45 AM, Alex Vandiver wrote: >> At Tue Dec 01 20:43:42 -0500 2009, Tejun Heo wrote: >>> Can you please try this one? >> >> Good and bad dmesg output attached. > > That's interesting. The link state seems to oscillates for quite long > time. Can you please try the followings? > > 1. Change sata_deb_timing_hotplug to sata_deb_timing_long in > ata_piix.c::piidx_sidpr_hardreset() and see whether it solves the > problem? > > 2. Switch the controller into ahci mode in BIOS if possible and see > whether the problem goes away. > > 3. Try kernel parameter "libata.force=nohrst" and see whether it makes > any difference. One more thing to try. 4. You can tell libata to reset the port by running the following command. echo "- - -" > /sys/class/scsi_host/hostN/scan N would be 0 or 1 on your configuration. Can you please run the above command repeatedly and see whether it triggers a reset failure? If so, the above will be far more convenient way to test than rebooting repeatedly. Thanks. -- tejun -- 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
