Andriy Gapon <a...@freebsd.org> wrote: > Today something unusual happened on one of my machines: > kernel: (ada0:ahcich0:0:0:0): lost device > kernel: (aprobe1:ahcich0:0:15:0): NOP. ACB: 00 00 00 00 00 00 00 00 00 00 00 > 00 > kernel: (aprobe1:ahcich0:0:15:0): CAM status: Command timeout > kernel: (aprobe1:ahcich0:0:15:0): Error 5, Retries exhausted > kernel: (aprobe1:ahcich0:0:15:0): NOP. ACB: 00 00 00 00 00 00 00 00 00 00 00 > 00 > kernel: (aprobe1:ahcich0:0:15:0): CAM status: Command timeout > kernel: (aprobe1:ahcich0:0:15:0): Error 5, Retries exhausted > kernel: cam_periph_alloc: attempt to re-allocate valid device ada0 rejected > flags 0x18 refcount 1 > kernel: adaasync: Unable to attach to new device due to status 0x6
I believe I saw something similar when trying to forcefully end the cam lockups reported in: http://lists.freebsd.org/pipermail/freebsd-current/2012-October/037413.html Detaching the disc drive caused /dev/cd0 to disappear as expected, but reinserting the drive didn't bring cd0 back. > It looks like the disk disappeared from the bus and then re-appeared on the > bus, > but not to the OS. > > One of the partitions that the disk hosted was a swap partition and it seems > to > be the cause of some of the following consequences. > > The consequences: [...] > * geom_event thread started consuming 100% of CPU in g_wither_washer() This sounds familiar as well: http://www.freebsd.org/cgi/query-pr.cgi?pr=171865 Fabian
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