[maemo-users] Missing space on MMC2

From: Torsten Hoefler maemo-users at unixer.de
Date: Fri Jun 6 10:42:25 EEST 2008
I'm missing about xxxMB os space on the internal MMC card.

df says 936.6 MiB used. 
Nokia-N810-51-3:~# df -h
Filesystem                Size      Used Available Use% Mounted on
/dev/mtdblock4            2.0M      2.0M         0 100% /mnt/initfs
none                    512.0k    100.0k    412.0k  20% /mnt/initfs/tmp
/dev/mtdblock4          251.5M    203.9M     47.6M  81% /
none                    512.0k    100.0k    412.0k  20% /tmp
none                      1.0M     20.0k   1004.0k   2% /dev
tmpfs                     1.0M         0      1.0M   0% /dev/shm
/dev/mmcblk0p1            1.9G    936.6M    979.7M  49% /media/mmc2
/dev/mmcblk1p1            3.8G      1.0G      2.8G  27% /media/mmc1

but there are no files as du says:
Nokia-N810-51-3:/media# du -sm /media/mmc2
202     /media/mmc2

Where are the missing 734.6 MiB? I am suspecting the Map application,
because I moved /media/mmc2/map to /media/mmc1/ in order to doanlowd
more maps. I guess, the US-East map was never freed on mmc2 :-/.

I was trying to unmount mmc2 (to fscheck or reformat) but it seems to be
busy ... lsof shows no open files. Same thing after a reboot:
Nokia-N810-51-3:/media# umount mmc2
umount: cannot umount /media/mmc2: Device or resource busy
Nokia-N810-51-3:/media# lsof|grep mmc2

How can I unmount the internal card? Or does anybody know the problem/a
solution. I don't like thie vfat FS anyway and would like to replace it
with ext3. But is the internal vfat better for SD memory (I hope it's
the SD-friendly version with a scatteres superblock?)? 

Thanks and Best,

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