mmcblk0: error -110 sending status comand
mmcblk0: error -110 sending read/write command, response 0x0, card status 0x0
mmcblk0: error -110 transferring data, sector 64, nr 1, card status 0x0
mmcblk0: error -110 requesting status
func is mmc_sd_num_wr_blocks, file is drivers/mmc/card/block.c[187] <<<-----
end_request: I/O error, dev mmcblk0, sector 64
Buffer I/O error on device mmcblk0p1, logical block 1
lost page write due to I/O error on mmcblk0p1
板子上SD卡只能插入一次，拔出SD卡后 df 查看不发生变化，但是文件不能访问，再次插入SD卡会报错
root@ti81xx:~# df -h
Filesystem Size Used Available Use% Mounted on
ubi0:rootfs 430.0M 55.7M 374.2M 13% /
devtmpfs 225.2M 172.0K 225.0M 0% /dev
none 225.3M 0 225.3M 0% /dev/shm
tmpfs 16.0M 60.0K 15.9M 0% /var/volatile
tmpfs 16.0M 0 16.0M 0% /media/ram
/dev/sda 916.9G 67.0G 803.3G 8% /zigsun
/dev/mmcblk0p2 7.3G 3.7G 3.3G 53% /media/mmcblk0p2
/dev/mmcblk0p1 69.5M 45.3M 24.2M 65% /media/mmcblk0p1
