Hi all, I have a custom board based on a i.MX6 SoC and it has a Sandisk eMMC (SDIN5D1-2G). When booting a vanilla kernel, I get lots of I/O errors. Before investigating, I would like to know if this is a known issue. Here is the full dmesg : [ 1.346762] mmcblk1: mmc1:0001 SEM02G 1.82 GiB [ 1.350142] mmcblk1boot0: mmc1:0001 SEM02G partition 1 1.00 MiB [ 1.354901] mmcblk1boot1: mmc1:0001 SEM02G partition 2 1.00 MiB [ 1.359643] mmcblk1rpmb: mmc1:0001 SEM02G partition 3 128 KiB [ 1.366291] mmcblk1: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0xb00 [ 1.374409] mmcblk1: retrying using single block read [ 1.378810] mmcblk1: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0x0 [ 1.386762] end_request: I/O error, dev mmcblk1, sector 0 [ 1.413406] mmcblk1: error -84 transferring data, sector 1, nr 7, cmd response 0x900, card status 0x0 [ 1.421363] end_request: I/O error, dev mmcblk1, sector 1 [ 1.425771] mmcblk1: error -84 transferring data, sector 2, nr 6, cmd response 0x900, card status 0x0 [ 1.425778] end_request: I/O error, dev mmcblk1, sector 2 [ 1.426069] mmcblk1: error -84 transferring data, sector 3, nr 5, cmd response 0x900, card status 0x0 [ 1.426076] end_request: I/O error, dev mmcblk1, sector 3 [ 1.426366] mmcblk1: error -84 transferring data, sector 4, nr 4, cmd response 0x900, card status 0x0 [ 1.426373] end_request: I/O error, dev mmcblk1, sector 4 [ 1.426663] mmcblk1: error -84 transferring data, sector 5, nr 3, cmd response 0x900, card status 0x0 [ 1.426670] end_request: I/O error, dev mmcblk1, sector 5 [ 1.426958] mmcblk1: error -84 transferring data, sector 6, nr 2, cmd response 0x900, card status 0x0 [ 1.426965] end_request: I/O error, dev mmcblk1, sector 6 [ 1.427253] mmcblk1: error -84 transferring data, sector 7, nr 1, cmd response 0x900, card status 0x0 [ 1.427260] end_request: I/O error, dev mmcblk1, sector 7 [ 1.427267] Buffer I/O error on device mmcblk1, logical block 0 [ 1.520695] mmcblk1: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0xb00 [ 1.557473] mmcblk1: retrying using single block read [ 1.566322] mmcblk1: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0x0 [ 1.604661] end_request: I/O error, dev mmcblk1, sector 0 [ 1.609037] mmcblk1: error -84 transferring data, sector 1, nr 7, cmd response 0x900, card status 0x0 [ 1.616988] end_request: I/O error, dev mmcblk1, sector 1 [ 1.621380] mmcblk1: error -84 transferring data, sector 2, nr 6, cmd response 0x900, card status 0x0 [ 1.629571] mmcblk1: error -84 transferring data, sector 3, nr 5, cmd response 0x900, card status 0x0 [ 1.637799] mmcblk1: error -84 transferring data, sector 4, nr 4, cmd response 0x900, card status 0x0 [ 1.646033] mmcblk1: error -84 transferring data, sector 5, nr 3, cmd response 0x900, card status 0x0 [ 1.654268] mmcblk1: error -84 transferring data, sector 6, nr 2, cmd response 0x900, card status 0x0 [ 1.662515] mmcblk1: error -84 transferring data, sector 7, nr 1, cmd response 0x900, card status 0x0 [ 1.670461] Buffer I/O error on device mmcblk1, logical block 0 [ 1.675099] mmcblk1: unable to read partition table [ 1.682365] mmcblk1boot1: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0xb00 [ 1.691986] mmcblk1boot1: retrying using single block read [ 1.696442] mmcblk1boot1: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0x0 [ 1.705449] mmcblk1boot1: error -84 transferring data, sector 1, nr 7, cmd response 0x900, card status 0x0 [ 1.714322] mmcblk1boot1: error -84 transferring data, sector 2, nr 6, cmd response 0x900, card status 0x0 [ 1.723424] mmcblk1boot1: error -84 transferring data, sector 3, nr 5, cmd response 0x900, card status 0x0 [ 1.732507] mmcblk1boot1: error -84 transferring data, sector 4, nr 4, cmd response 0x900, card status 0x0 [ 1.741569] mmcblk1boot1: error -84 transferring data, sector 5, nr 3, cmd response 0x900, card status 0x0 [ 1.750762] mmcblk1boot1: error -84 transferring data, sector 6, nr 2, cmd response 0x900, card status 0x0 [ 1.759745] mmcblk1boot1: error -84 transferring data, sector 7, nr 1, cmd response 0x900, card status 0x0 [ 1.768105] Buffer I/O error on device mmcblk1boot1, logical block 0 [ 1.774224] mmcblk1boot1: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0xb00 [ 1.783320] mmcblk1boot1: retrying using single block read [ 1.787776] mmcblk1boot1: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0x0 [ 1.796600] mmcblk1boot1: error -84 transferring data, sector 1, nr 7, cmd response 0x900, card status 0x0 [ 1.806249] mmcblk1boot1: error -84 transferring data, sector 2, nr 6, cmd response 0x900, card status 0x0 [ 1.815130] mmcblk1boot1: error -84 transferring data, sector 3, nr 5, cmd response 0x900, card status 0x0 [ 1.824109] mmcblk1boot1: error -84 transferring data, sector 4, nr 4, cmd response 0x900, card status 0x0 [ 1.832785] mmcblk1boot1: error -84 transferring data, sector 5, nr 3, cmd response 0x900, card status 0x0 [ 1.842041] mmcblk1boot1: error -84 transferring data, sector 6, nr 2, cmd response 0x900, card status 0x0 [ 1.850854] mmcblk1boot1: error -84 transferring data, sector 7, nr 1, cmd response 0x900, card status 0x0 [ 1.859403] Buffer I/O error on device mmcblk1boot1, logical block 0 [ 1.864681] mmcblk1boot1: unable to read partition table [ 1.869905] mmcblk1boot0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0xb00 [ 1.878753] mmcblk1boot0: retrying using single block read [ 1.883798] mmcblk1boot0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0x0 [ 1.892674] mmcblk1boot0: error -84 transferring data, sector 1, nr 7, cmd response 0x900, card status 0x0 [ 1.902740] mmcblk1boot0: error -84 transferring data, sector 2, nr 6, cmd response 0x900, card status 0x0 [ 1.911604] mmcblk1boot0: error -84 transferring data, sector 3, nr 5, cmd response 0x900, card status 0x0 [ 1.920287] mmcblk1boot0: error -84 transferring data, sector 4, nr 4, cmd response 0x900, card status 0x0 [ 1.928900] mmcblk1boot0: error -84 transferring data, sector 5, nr 3, cmd response 0x900, card status 0x0 [ 1.939773] mmcblk1boot0: error -84 transferring data, sector 6, nr 2, cmd response 0x900, card status 0x0 [ 1.948437] mmcblk1boot0: error -84 transferring data, sector 7, nr 1, cmd response 0x900, card status 0x0 [ 1.956917] Buffer I/O error on device mmcblk1boot0, logical block 0 [ 1.962548] mmcblk1boot0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0xb00 [ 1.971325] mmcblk1boot0: retrying using single block read [ 1.975828] mmcblk1boot0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0x0 [ 1.984565] mmcblk1boot0: error -84 transferring data, sector 1, nr 7, cmd response 0x900, card status 0x0 [ 1.993267] mmcblk1boot0: error -84 transferring data, sector 2, nr 6, cmd response 0x900, card status 0x0 [ 2.001976] mmcblk1boot0: error -84 transferring data, sector 3, nr 5, cmd response 0x900, card status 0x0 [ 2.010703] mmcblk1boot0: error -84 transferring data, sector 4, nr 4, cmd response 0x900, card status 0x0 [ 2.019406] mmcblk1boot0: error -84 transferring data, sector 5, nr 3, cmd response 0x900, card status 0x0 [ 2.028127] mmcblk1boot0: error -84 transferring data, sector 6, nr 2, cmd response 0x900, card status 0x0 [ 2.036844] mmcblk1boot0: error -84 transferring data, sector 7, nr 1, cmd response 0x900, card status 0x0 [ 2.045304] Buffer I/O error on device mmcblk1boot0, logical block 0 [ 2.050460] mmcblk1boot0: unable to read partition table Thanks, JM -- To unsubscribe from this list: send the line "unsubscribe linux-mmc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
