[    1.508549] mmc1: new DDR MMC card at address 0001
[    1.514264] mmcblk1: mmc1:0001 M8B16G 14.5 GiB
[    1.519407] mmcblk1boot0: mmc1:0001 M8B16G partition 1 4.00 MiB
[    1.525972] mmcblk1boot1: mmc1:0001 M8B16G partition 2 4.00 MiB
[    1.532617] sunxi-mmc 4022000.mmc: data error, sending stop command
[    1.539855] sunxi-mmc 4022000.mmc: data error, sending stop command
[    1.547569] sunxi-mmc 4022000.mmc: data error, sending stop command
[    1.554185] sunxi-mmc 4022000.mmc: data error, sending stop command
[    1.560769] sunxi-mmc 4022000.mmc: data error, sending stop command
[    1.630253] sunxi-mmc 4022000.mmc: data error, sending stop command
[    1.636542] blk_update_request: I/O error, dev mmcblk1, sector 0 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0
[    1.646702] Buffer I/O error on dev mmcblk1, logical block 0, async page read
[    1.654122] sunxi-mmc 4022000.mmc: data error, sending stop command
[    1.660646] sunxi-mmc 4022000.mmc: data error, sending stop command
[    1.667168] sunxi-mmc 4022000.mmc: data error, sending stop command
[    1.673690] sunxi-mmc 4022000.mmc: data error, sending stop command
[    1.680211] sunxi-mmc 4022000.mmc: data error, sending stop command
[    1.686734] sunxi-mmc 4022000.mmc: data error, sending stop command
[    1.693019] blk_update_request: I/O error, dev mmcblk1, sector 0 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0
[    1.703175] Buffer I/O error on dev mmcblk1, logical block 0, async page read
[    1.710305]  mmcblk1: unable to read partition table

# fdisk /dev/mmcblk1
[  429.934525] sunxi-mmc 4022000.mmc: data error, sending stop command
[  429.941105] sunxi-mmc 4022000.mmc: data error, sending stop command
[  429.947628] sunxi-mmc 4022000.mmc: data error, sending stop command
[  429.954153] sunxi-mmc 4022000.mmc: data error, sending stop command
[  429.960678] sunxi-mmc 4022000.mmc: data error, sending stop command
[  429.967203] sunxi-mmc 4022000.mmc: data error, sending stop command
[  429.973492] blk_update_request: I/O error, dev mmcblk1, sector 0 op 0x0:(READ) flags 0x80700 phys_seg 3 prio class 0
[  429.984263] sunxi-mmc 4022000.mmc: data error, sending stop command
[  429.990786] sunxi-mmc 4022000.mmc: data error, sending stop command
[  429.997308] sunxi-mmc 4022000.mmc: data error, sending stop command
[  430.003830] sunxi-mmc 4022000.mmc: data error, sending stop command
[  430.010351] sunxi-mmc 4022000.mmc: data error, sending stop command
[  430.016872] sunxi-mmc 4022000.mmc: data error, sending stop command
[  430.023157] blk_update_request: I/O error, dev mmcblk1, sector 0 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0
[  430.033314] Buffer I/O error on dev mmcblk1, logical block 0, async page read
fdisk: can't read from /dev/mmcblk1