https://bugzilla.kernel.org/show_bug.cgi?id=17551 --- Comment #7 from starlight@xxxxxxxxxxx 2010-08-31 09:32:44 --- Left out one bit of hardware, and remembering it lead to an idea. A SuperMicro SAS-113TQ SAS/SATA backplane ( http://www.supermicro.com/manuals/other/BPN-SAS-113TQ.pdf ) is also in the mix and could be a possible cause of random hotplug events. Distinctly recall puzzling over two tiny ribbon cables that run between the controller card and the backplane. Turned out that the extra connections allow the controller and backplane to communicate via the obscure "SGPIO" protocol ( http://en.wikipedia.org/wiki/SGPIO ). Seems to be for flashing LEDs but who knows? Maybe the backplane can trigger hotplug events. Another detail is that it's always the last drive in each of the two SAS IPASS cable groups that drops: either physical slot 3 or physical slot 7 (where the ranges are 0-3 and 4-7). A suspicious coincidence. -- 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
