https://bugzilla.kernel.org/show_bug.cgi?id=17551 --- Comment #9 from starlight@xxxxxxxxxxx 2010-09-05 06:40:44 --- Possibly have figured this out. Since the problem often has occurred when the logging application becomes idle, it seems possible that power management in the drives is a cause. The Seagate Momentus ST9500420AS drives are known for parking their heads aggressively (and driving laptop users nuts). For some reason 'hdparm' does not work with LSI attached drives under CentOS 5.5, but it does work under Fedora 12. Have a F12 OS image available on the server and used it to run 'hdparm -B 255 /dev/sdX' on all of the drives, then rebooted back to CentOS after verifying that the value sticks. Time will tell if disabling APM on the drives works around the issue. If this is the cause, it implies that possibly the LSI firmware is mistaking APM event notifications from the drives as hot-plug events. Seems to me that would be a bug. However it's strange that this only happens after an extended period of time, so it may be a more complex variation of that basic theory. Perhaps the drives have a quirk where they drop into the spin-down power state only after a certain amount of uptime. -- Configure bugmail: https://bugzilla.kernel.org/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are watching the assignee of the bug. -- To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
