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root@cylon:/home# fdisk -l /dev/mmcblk0

 

Disk /dev/mmcblk0: 1990 MB, 1990197248 bytes

5 heads, 4 sectors/track, 194355 cylinders, total 3887104 sectors

Units = sectors of 1 * 512 = 512 bytes

Sector size (logical/physical): 512 bytes / 512 bytes

I/O size (minimum/optimal): 512 bytes / 512 bytes

Disk identifier: 0x00000000

 

        Device Boot      Start         End      Blocks   Id  System

/dev/mmcblk0p1             131     3887103     1943486+   6  FAT16

 

root@cylon:/home# mount -t vfat /dev/mmcblk0 /mnt

mount: wrong fs type, bad option, bad superblock on /dev/mmcblk0,

       missing codepage or helper program, or other error

       In some cases useful info is found in syslog - try

       dmesg | tail  or so

 

root@cylon:/home# dmesg | tail

[87246.330165] end_request: I/O error, dev mmcblk0, sector 3

[87246.330205] EXT4-fs (mmcblk0): unable to read superblock

[87246.358098] FAT-fs (mmcblk0): bogus number of reserved sectors

[87246.358111] FAT-fs (mmcblk0): Can't find a valid FAT filesystem

[87371.713581] FAT-fs (mmcblk0): bogus number of reserved sectors

[87371.713589] FAT-fs (mmcblk0): Can't find a valid FAT filesystem

[87570.575849] mmcblk0: error -110 transferring data, sector 3887096, nr 8, cmd response 0x900, card status 0xb00

[87570.575871] mmcblk0: retrying using single block read

[87594.173030] FAT-fs (mmcblk0): bogus number of reserved sectors

[87594.173052] FAT-fs (mmcblk0): Can't find a valid FAT filesystem