挂载SD卡中的文件系统出现如下错误：
[ 39.099740] sunxi-mmc 1c0f000.sdmmc: smc 0 p0 err, cmd 18, RD EBE !!
[ 39.106934] sunxi-mmc 1c0f000.sdmmc: data error, sending stop command
[ 39.116312] mmcblk0: timed out sending r/w cmd command, card status 0x900
[ 39.124000] mmcblk0: not retrying timeout
[ 39.128540] end_request: I/O error, dev mmcblk0, sector 4261904
[ 39.136027] EXT4-fs error (device mmcblk0p2): ext4_wait_block_bitmap:466: comm kworker/u2:1: Cannot read block bitmap - block_group = 18, block_bitmap = 524290
[ 39.154597] sunxi-mmc 1c0f000.sdmmc: smc 0 p0 err, cmd 25, WR DCE EBE !!
[ 39.162245] sunxi-mmc 1c0f000.sdmmc: data error, sending stop command
[ 39.170584] mmcblk0: timed out sending r/w cmd command, card status 0x900
[ 39.178334] mmcblk0: not retrying timeout
[ 39.182815] end_request: I/O error, dev mmcblk0, sector 67584
[ 39.189294] Buffer I/O error on device mmcblk0p2, logical block 0
[ 39.196057] lost page write due to I/O error on mmcblk0p2
[ 39.205823] sunxi-mmc 1c0f000.sdmmc: smc 0 p0 err, cmd 25, WR DCE !!
[ 39.213113] sunxi-mmc 1c0f000.sdmmc: data error, sending stop command
[ 39.221500] mmcblk0: timed out sending r/w cmd command, card status 0x900
[ 39.229237] mmcblk0: not retrying timeout
[ 39.233719] end_request: I/O error, dev mmcblk0, sector 5048320
[ 39.240376] Buffer I/O error on device mmcblk0p2, logical block 622592
[ 39.247674] EXT4-fs warning (device mmcblk0p2): ext4_end_bio:286: I/O error writing to inode 130097 (offset 0 size 4096 starting block 631041)
[ 45.068668] sunxi-mmc 1c0f000.sdmmc: smc 0 p0 err, cmd 25, WR DCE !!
[ 45.075830] sunxi-mmc 1c0f000.sdmmc: data error, sending stop command
[ 45.084256] mmcblk0: timed out sending r/w cmd command, card status 0x900
[ 45.091945] mmcblk0: not retrying timeout
[ 45.096425] end_request: I/O error, dev mmcblk0, sector 4524936
[ 45.103104] end_request: I/O error, dev mmcblk0, sector 4524944
[ 45.109758] end_request: I/O error, dev mmcblk0, sector 4524952
[ 45.116338] end_request: I/O error, dev mmcblk0, sector 4524960
[ 45.123118] end_request: I/O error, dev mmcblk0, sector 4524968
[ 45.131313] Aborting journal on device mmcblk0p2-8.
[ 45.136985] EXT4-fs error (device mmcblk0p2) in ext4_reserve_inode_write:4979: Journal has aborted
[ 45.147155] EXT4-fs (mmcblk0p2): previous I/O error to superblock detected
[ 45.155063] sunxi-mmc 1c0f000.sdmmc: smc 0 p0 err, cmd 25, WR DCE !!
[ 45.162288] sunxi-mmc 1c0f000.sdmmc: data error, sending stop command
[ 45.169618] mmcblk0: timed out sending r/w cmd command, card status 0x900
[ 45.177231] mmcblk0: not retrying timeout
[ 45.181773] end_request: I/O error, dev mmcblk0, sector 4524032
[ 45.188410] Buffer I/O error on device mmcblk0p2, logical block 557056
[ 45.195663] lost page write due to I/O error on mmcblk0p2
[ 45.202031] JBD2: Error -5 detected when updating journal superblock for mmcblk0p2-8.
[ 45.211380] sunxi-mmc 1c0f000.sdmmc: smc 0 p0 err, cmd 25, WR DCE EBE !!
[ 45.219025] sunxi-mmc 1c0f000.sdmmc: data error, sending stop command
[ 45.226292] mmcblk0: timed out sending r/w cmd command, card status 0x900
[ 45.233927] mmcblk0: not retrying timeout
[ 45.238454] end_request: I/O error, dev mmcblk0, sector 67584
[ 45.244845] Buffer I/O error on device mmcblk0p2, logical block 0
[ 45.251675] lost page write due to I/O error on mmcblk0p2
[ 45.257835] EXT4-fs error (device mmcblk0p2) in ext4_dirty_inode:5098: Journal has aborted
[ 45.267129] EXT4-fs (mmcblk0p2): previous I/O error to superblock detected
[ 45.277304] sunxi-mmc 1c0f000.sdmmc: smc 0 p0 err, cmd 25, WR DCE EBE !!
[ 45.284960] sunxi-mmc 1c0f000.sdmmc: data error, sending stop command
[ 45.292297] mmcblk0: timed out sending r/w cmd command, card status 0x900
[ 45.299902] mmcblk0: not retrying timeout
[ 45.304385] end_request: I/O error, dev mmcblk0, sector 67584
[ 45.310831] Buffer I/O error on device mmcblk0p2, logical block 0
[ 45.317594] lost page write due to I/O error on mmcblk0p2
不知道是哪里的问题，希望大家指点一下？？？？非常感谢