[ 4.573364] mmc_queue_do_make_request process file-storage (pid 218), read to sector 0, sectors 8
[ 5.276947] mmcblk0: error -110 transferring data, sector 0, nr 8, card status 0x0
[ 5.278961] mmcblk0: error -110 sending stop command, response 0x0, card status 0x0
[ 5.286712] end_request: I/O error, dev mmcblk0, sector 0
[ 5.292053] Buffer I/O error on device mmcblk0, logical block 0
[ 5.298614] mmc_queue_do_make_request process file-storage (pid 218), read to sector 0, sectors 8
[ 6.006286] mmcblk0: error -110 transferring data, sector 0, nr 8, card status 0x0
[ 6.008300] mmcblk0: error -110 sending stop command, response 0x0, card status 0x0

[ 8.926147] mmcblk0: error -110 transferring data, sector 31047552, nr 8, card status 0x0
[ 8.928802] mmcblk0: error -110 sending stop command, response 0x0, card status 0x0
[ 8.936553] end_request: I/O error, dev mmcblk0, sector 31047552
[ 8.942504] Buffer I/O error on device mmcblk0, logical block 3880944
[ 9.648834] mmcblk0: error -110 transferring data, sector 31047552, nr 8, card status 0x0
[ 9.651550] mmcblk0: error -110 sending stop command, response 0x0, card status 0x0
[ 9.659179] end_request: I/O error, dev mmcblk0, sector 31047552
[ 9.665161] Buffer I/O error on device mmcblk0, logical block 3880944

# cat /dev/mmcblk0
cat: read error: Input/output error

dd if=/dev/zero of=/dev/mmcblk0
dd: writing '/dev/mmcblk0': Input/output error
1+0 records in
0+0 records out
0 bytes (0B) copied, 0.728272 seconds, 0B/s