Hannes, list, reading your kernel path there http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=63583cca745f440167bf27877182dc13e19d4bcf I wonder if this is expected that a write io on a write protected device is returned to the queue ? I would have guessed it qualified as TARGET_ERROR, hence not retryable (and not causing path invalidation). In the following log the sense code is clearly seen as Sense Key : Data Protect [current] Add. Sense: Write protected The log is grabbed from a el6 kernel rev. 131 which include the mentioned patch (since rev. 110 iirc). Care to confirm something is fishy there ? Regards, cvaroqui ==== Jan 6 02:54:20 wheeler multipathd: 360000970000292602571533030384444: remaining active paths: 0 Jan 6 02:54:20 wheeler multipathd: 360000970000292602571533030384444: Entering recovery mode: max_retries=5 Jan 6 02:54:23 wheeler multipathd: 360000970000292602571533030384444: sdbq - tur checker reports path is up Jan 6 02:54:23 wheeler multipathd: 68:64: reinstated Jan 6 02:54:23 wheeler multipathd: 360000970000292602571533030384444: queue_if_no_path enabled Jan 6 02:54:23 wheeler multipathd: 360000970000292602571533030384444: Recovered to normal mode Jan 6 02:54:23 wheeler multipathd: 360000970000292602571533030384444: remaining active paths: 1 Jan 6 02:54:23 wheeler kernel: sd 2:0:0:15: [sdbq] Unhandled sense code Jan 6 02:54:23 wheeler kernel: sd 2:0:0:15: [sdbq] Result: hostbyte=invalid driverbyte=DRIVER_SENSE Jan 6 02:54:23 wheeler kernel: sd 2:0:0:15: [sdbq] Sense Key : Data Protect [current] Jan 6 02:54:23 wheeler kernel: sd 2:0:0:15: [sdbq] Add. Sense: Write protected Jan 6 02:54:23 wheeler kernel: sd 2:0:0:15: [sdbq] CDB: Write(10): 2a 00 00 00 00 d0 00 00 10 00 Jan 6 02:54:23 wheeler kernel: end_request: I/O error, dev sdbq, sector 208 Jan 6 02:54:23 wheeler kernel: device-mapper: multipath: Failing path 68:64. Jan 6 02:54:24 wheeler multipathd: 360000970000292602571533030384444: sdq - tur checker reports path is up Jan 6 02:54:24 wheeler multipathd: 65:0: reinstated Jan 6 02:54:24 wheeler multipathd: 360000970000292602571533030384444: remaining active paths: 2 Jan 6 02:54:24 wheeler multipathd: 360000970000292602571533030384444: sdaq - tur checker reports path is up Jan 6 02:54:24 wheeler multipathd: 66:160: reinstated Jan 6 02:54:24 wheeler multipathd: 360000970000292602571533030384444: remaining active paths: 3 Jan 6 02:54:24 wheeler multipathd: 360000970000292602571533030384444: sdcq - tur checker reports path is up Jan 6 02:54:24 wheeler multipathd: 69:224: reinstated Jan 6 02:54:24 wheeler multipathd: 360000970000292602571533030384444: remaining active paths: 4 Jan 6 02:54:24 wheeler multipathd: 68:64: mark as failed Jan 6 02:54:24 wheeler multipathd: 360000970000292602571533030384444: remaining active paths: 3 Jan 6 02:54:24 wheeler kernel: sd 1:0:0:15: [sdq] Unhandled sense code Jan 6 02:54:24 wheeler kernel: sd 1:0:0:15: [sdq] Result: hostbyte=invalid driverbyte=DRIVER_SENSE Jan 6 02:54:24 wheeler kernel: sd 1:0:0:15: [sdq] Sense Key : Data Protect [current] Jan 6 02:54:24 wheeler kernel: sd 1:0:0:15: [sdq] Add. Sense: Write protected Jan 6 02:54:24 wheeler kernel: sd 1:0:0:15: [sdq] CDB: Write(10): 2a 00 00 00 00 d0 00 00 10 00 Jan 6 02:54:24 wheeler kernel: end_request: I/O error, dev sdq, sector 208 Jan 6 02:54:24 wheeler kernel: device-mapper: multipath: Failing path 65:0. Jan 6 02:54:24 wheeler kernel: sd 2:0:1:15: [sdcq] Unhandled sense code Jan 6 02:54:24 wheeler kernel: sd 2:0:1:15: [sdcq] Result: hostbyte=invalid driverbyte=DRIVER_SENSE Jan 6 02:54:24 wheeler kernel: sd 2:0:1:15: [sdcq] Sense Key : Data Protect [current] Jan 6 02:54:24 wheeler kernel: sd 2:0:1:15: [sdcq] Add. Sense: Write protected Jan 6 02:54:24 wheeler kernel: sd 2:0:1:15: [sdcq] CDB: Write(10): 2a 00 00 00 00 d0 00 00 10 00 Jan 6 02:54:24 wheeler kernel: end_request: I/O error, dev sdcq, sector 208 Jan 6 02:54:24 wheeler kernel: device-mapper: multipath: Failing path 69:224. Jan 6 02:54:24 wheeler kernel: sd 1:0:1:15: [sdaq] Unhandled sense code Jan 6 02:54:24 wheeler kernel: sd 1:0:1:15: [sdaq] Result: hostbyte=invalid driverbyte=DRIVER_SENSE Jan 6 02:54:24 wheeler kernel: sd 1:0:1:15: [sdaq] Sense Key : Data Protect [current] Jan 6 02:54:24 wheeler kernel: sd 1:0:1:15: [sdaq] Add. Sense: Write protected Jan 6 02:54:24 wheeler kernel: sd 1:0:1:15: [sdaq] CDB: Write(10): 2a 00 00 00 00 d0 00 00 10 00 Jan 6 02:54:24 wheeler kernel: end_request: I/O error, dev sdaq, sector 208 Jan 6 02:54:24 wheeler kernel: device-mapper: multipath: Failing path 66:160. Jan 6 02:54:25 wheeler multipathd: 65:0: mark as failed Jan 6 02:54:25 wheeler multipathd: 360000970000292602571533030384444: remaining active paths: 2 Jan 6 02:54:25 wheeler multipathd: 66:160: mark as failed Jan 6 02:54:25 wheeler multipathd: 360000970000292602571533030384444: remaining active paths: 1 Jan 6 02:54:25 wheeler multipathd: 69:224: mark as failed Jan 6 02:54:25 wheeler multipathd: 360000970000292602571533030384444: Entering recovery mode: max_retries=5 Jan 6 02:54:25 wheeler multipathd: 360000970000292602571533030384444: remaining active paths: 0 -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel
