[android-developers] problem regarding umount mmcblk0p14 on android jellybean

Hi All,

I have upgraded my mobile from Android Gingerbread to Android  jelly bean and facing the below problem.

$mount

/dev/block/mmcblk0p14 /data/mnt/modemfs1 ext4 ro,nosuid,nodev,relatime,user_xattr,barrier=1,data=ordered 0 0

umount /data/mnt/modemfs1   -> Gingerbread : I am able to umount and mount the mmcblk0p14

                  -> Jellybean     : I am not able to umount the mmcblk0p14(abd shell getting hanged when executing ). When I did ctrl + C mmcblk0p14 

                         entry not availble under the $mount. When I try to repair this file system using e2fsck showing the below  error: 

                         Device or resource busy while trying to open /dev/block/mmcblk0p14 

                                                                         Filesystem mounted or opened exclusively by another program?

Please any one help me to solve this problem or which android service/daemon is using mmcblk0p14.

Any help appreciated .

Thanks in Advance 

Ash

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