[Android Software Development] Caldair:
Here is my terminal emulator output for mount.

Before:

u0_a39@android:/ $ mount
rootfs / rootfs ro,relatime 0 0
tmpfs /dev tmpfs rw,nosuid,relatime,mode=755 0 0
devpts /dev/pts devpts rw,relatime,mode=600 0 0
none /dev/cpuctl cgroup rw,relatime,cpu 0 0
proc /proc proc rw,relatime 0 0
sysfs /sys sysfs rw,relatime 0 0
/sys/kernel/debug /sys/kernel/debug debugfs rw,relatime 0 0
tmpfs /storage tmpfs rw,relatime,mode=050,gid=1028 0 0
tmpfs /storage/emulated tmpfs rw,nosuid,nodev,relatime,mode=050,gid=1028 0 0
/dev/block/vold/179:25 /storage/sdcard1 vfat rw,dirsync,nosuid,nodev,noexec,relatime,uid=1000,gid=1015,fmask=0702,dmask=0702,allow_utime=0020,codepage=cp437,iocharset=iso8859-1,shortname=mixed,utf8,errors=remount-ro 0 0
none /acct cgroup rw,relatime,cpuacct 0 0
tmpfs /mnt/secure tmpfs rw,relatime,mode=700 0 0
tmpfs /mnt/asec tmpfs rw,relatime,mode=755,gid=1000 0 0
/dev/block/dm-0 /mnt/asec/ccc71.pmw.pro-1 ext4 ro,dirsync,nosuid,nodev,noatime,barrier=1 0 0
tmpfs /mnt/obb tmpfs rw,relatime,mode=755,gid=1000 0 0
/dev/block/platform/omap/omap_hsmmc.1/by-name/FACTORYFS /system ext4 ro,relatime,barrier=0,data=ordered,noauto_da_alloc 0 0
/dev/block/platform/omap/omap_hsmmc.1/by-name/EFS /efs ext4 rw,nosuid,nodev,relatime,barrier=0,data=ordered,noauto_da_alloc 0 0
/dev/block/platform/omap/omap_hsmmc.1/by-name/DATAFS /data ext4 rw,nosuid,nodev,noatime,barrier=1,journal_async_commit,data=writeback,noauto_da_alloc,discard 0 0
/dev/block/platform/omap/omap_hsmmc.1/by-name/CACHE /cache ext4 rw,nosuid,nodev,noatime,barrier=1,journal_async_commit,data=ordered,noauto_da_alloc,discard 0 0
/dev/fuse /mnt/shell/emulated fuse rw,nosuid,nodev,relatime,user_id=1023,group_id=1023,default_permissions,allow_other 0 0
/dev/fuse /storage/emulated/0 fuse rw,nosuid,nodev,relatime,user_id=1023,group_id=1023,default_permissions,allow_other 0 0
/dev/fuse /storage/emulated/0/Android/obb fuse rw,nosuid,nodev,relatime,user_id=1023,group_id=1023,default_permissions,allow_other 0 0
/dev/fuse /storage/emulated/legacy fuse rw,nosuid,nodev,relatime,user_id=1023,group_id=1023,default_permissions,allow_other 0 0
/dev/fuse /storage/emulated/legacy/Android/obb fuse rw,nosuid,nodev,relatime,user_id=1023,group_id=1023,default_permissions,allow_other 0 0
u0_a39@android:/ $

After FM successfully mounts /data/media at /storage/sdcard1/INTERNAL:

u0_a39@android:/ $ mount
rootfs / rootfs ro,relatime 0 0
tmpfs /dev tmpfs rw,nosuid,relatime,mode=755 0 0
devpts /dev/pts devpts rw,relatime,mode=600 0 0
none /dev/cpuctl cgroup rw,relatime,cpu 0 0
proc /proc proc rw,relatime 0 0
sysfs /sys sysfs rw,relatime 0 0
/sys/kernel/debug /sys/kernel/debug debugfs rw,relatime 0 0
tmpfs /storage tmpfs rw,relatime,mode=050,gid=1028 0 0
tmpfs /storage/emulated tmpfs rw,nosuid,nodev,relatime,mode=050,gid=1028 0 0
none /acct cgroup rw,relatime,cpuacct 0 0
tmpfs /mnt/secure tmpfs rw,relatime,mode=700 0 0
tmpfs /mnt/asec tmpfs rw,relatime,mode=755,gid=1000 0 0
/dev/block/dm-0 /mnt/asec/ccc71.pmw.pro-1 ext4 ro,dirsync,nosuid,nodev,noatime,barrier=1 0 0
tmpfs /mnt/obb tmpfs rw,relatime,mode=755,gid=1000 0 0
/dev/block/platform/omap/omap_hsmmc.1/by-name/FACTORYFS /system ext4 ro,relatime,barrier=0,data=ordered,noauto_da_alloc 0 0
/dev/block/platform/omap/omap_hsmmc.1/by-name/EFS /efs ext4 rw,nosuid,nodev,relatime,barrier=0,data=ordered,noauto_da_alloc 0 0
/dev/block/platform/omap/omap_hsmmc.1/by-name/DATAFS /data ext4 rw,nosuid,nodev,noatime,barrier=1,journal_async_commit,data=writeback,noauto_da_alloc,discard 0 0
/dev/block/platform/omap/omap_hsmmc.1/by-name/CACHE /cache ext4 rw,nosuid,nodev,noatime,barrier=1,journal_async_commit,data=ordered,noauto_da_alloc,discard 0 0
/dev/fuse /mnt/shell/emulated fuse rw,nosuid,nodev,relatime,user_id=1023,group_id=1023,default_permissions,allow_other 0 0
/dev/fuse /storage/emulated/0 fuse rw,nosuid,nodev,relatime,user_id=1023,group_id=1023,default_permissions,allow_other 0 0
/dev/fuse /storage/emulated/0/Android/obb fuse rw,nosuid,nodev,relatime,user_id=1023,group_id=1023,default_permissions,allow_other 0 0
/dev/fuse /storage/emulated/legacy fuse rw,nosuid,nodev,relatime,user_id=1023,group_id=1023,default_permissions,allow_other 0 0
/dev/fuse /storage/emulated/legacy/Android/obb fuse rw,nosuid,nodev,relatime,user_id=1023,group_id=1023,default_permissions,allow_other 0 0
/dev/block/vold/179:25 /storage/sdcard1 vfat rw,relatime,uid=1000,gid=1015,fmask=0000,dmask=0000,allow_utime=0022,codepage=cp437,iocharset=iso8859-1,shortname=mixed,errors=remount-ro 0 0
/dev/block/vold/179:25 /data/media vfat rw,relatime,uid=1000,gid=1015,fmask=0000,dmask=0000,allow_utime=0022,codepage=cp437,iocharset=iso8859-1,shortname=mixed,errors=remount-ro 0 0
u0_a39@android:/ $

I was wrong in what I said before about the error, which to me seems minimal anyway. The error does state that the permission problem is with the external storage, but the missing permission does appear on /data/media itself.

Interesting too is if I run FolderMount again after it finishes at boot time and gives the error, i can unmount and remount right away and it is successful in every way this time, every time. Maybe FM needs to wait a little longer at boot? I don't know much about file system stuff, but wish I could help more.

Thanks again for this great app! ( I'm on v1.5 now:good:)