On Tue, 2008-09-23 at 00:27 +0530, partha chowdhury wrote: > On Mon, 2008-09-22 at 11:43 +0300, Pasi Kärkkäinen wrote: > > I'm seeing this same problem on IBM HS21-8853 blades. > > > > It _seems_ like a bug in IRQ routing in BIOS/motherboard.. ACPI issue? > > > > With IBM blades I'm able to fix the problem by generating the initrd image > > with "--without-usb" switch.. this delays the USB module initialization/loading, > > somehow fixing the problem.. giving different IRQ to USB controller. > > > > -- Pasi > > _______________________________________________ > > i just tried your fix and it solved the problem. now the usb drive does > not disappear any more. Thank you well I spoke too soon .Now the error message i am getting : Sep 23 00:37:46 station2 kernel: [<c044e6fa>] __report_bad_irq +0x2b/0x69 Sep 23 00:37:46 station2 kernel: [<c044e8e7>] note_interrupt +0x1af/0x1e8 Sep 23 00:37:46 station2 kernel: [<c057afb4>] usb_hcd_irq+0x23/0x50 Sep 23 00:37:46 station2 kernel: [<c044df27>] handle_IRQ_event +0x23/0x49 Sep 23 00:37:46 station2 kernel: [<c044dfe8>] __do_IRQ+0x9b/0xd6 Sep 23 00:37:46 station2 kernel: [<c04073f4>] do_IRQ+0x93/0xae Sep 23 00:37:46 station2 kernel: [<c040592e>] common_interrupt +0x1a/0x20 Sep 23 00:37:46 station2 kernel: [<c0403b98>] default_idle+0x0/0x59 Sep 23 00:37:46 station2 kernel: [<c0403bc9>] default_idle+0x31/0x59 Sep 23 00:37:46 station2 kernel: [<c0403c90>] cpu_idle+0x9f/0xb9 Sep 23 00:37:46 station2 kernel: [<c06ed9ee>] start_kernel+0x379/0x380 Sep 23 00:37:46 station2 kernel: ======================= Sep 23 00:37:46 station2 kernel: handlers: Sep 23 00:37:46 station2 kernel: [<c057af91>] (usb_hcd_irq+0x0/0x50) Sep 23 00:37:46 station2 kernel: Disabling IRQ #58 and the same thing happens i.e i am unable to remount the usb drive. can someone tell me if its a centos/rhel bug and if it is how and where i should file a bug report ?