BQ E4.5 (OTA-9.1): microSD card can't be unmounted/formatted - mediascanner keeps it busy and no feedback to user

[Matthias Apitz]

I have inserted an used 8 GByte SD card which is recognised by the E4.5 and
mounted (even if the SD GUI app says it can not mount or format it):

phablet@ubuntu-phablet:~$ mount | fgrep vfat
/dev/mmcblk1p1 on /media/phablet/7895-9F4B type vfat (rw,nosuid,nodev,relatime,uid=32011,gid=32011,fmask=0022,dmask=0022,codepage=cp437,iocharset=iso8859-1,shortname=mixed,showexec,utf8,flush,errors=remount-ro,uhelper=udisks2)

also all the old content is visible fine:

phablet@ubuntu-phablet:~$ find /media/phablet/7895-9F4B | wc -l
114352
phablet@ubuntu-phablet:~$ du -sh /media/phablet/7895-9F4B
3.7G /media/phablet/7895-9F4B
phablet@ubuntu-phablet:~$ df -kh /media/phablet/7895-9F4B
Filesystem Size Used Avail Use% Mounted on
/dev/mmcblk1p1 5.1G 3.7G 1.4G 73% /media/phablet/7895-9F4B

phablet@ubuntu-phablet:~$ ls -l /media/phablet/7895-9F4B
total 352
drwxr-xr-x 4 phablet phablet 32768 Jan 1 2012 diario2011
drwxr-xr-x 4 phablet phablet 32768 Jan 2 2013 diario2012
drwxr-xr-x 3 phablet phablet 32768 Nov 27 2011 dic
drwxr-xr-x 2 phablet phablet 32768 Apr 3 15:16 Documents
drwxr-xr-x 2 phablet phablet 32768 Apr 3 15:16 Downloads
drwxr-xr-x 2 phablet phablet 32768 Jul 15 2012 Habana2011
drwxr-xr-x 2 phablet phablet 32768 Jul 19 2012 Habana2011.1024
drwxr-xr-x 3 phablet phablet 32768 Jan 1 2000 Maps
drwxr-xr-x 2 phablet phablet 32768 Apr 3 15:16 Music
drwxr-xr-x 2 phablet phablet 32768 Apr 3 15:16 Pictures
drwxr-xr-x 2 phablet phablet 32768 Apr 3 15:16 Videos

I can not unmount it because it is busy and the GUI let not unmount or format it either.

[Jean-Baptiste Lallement (jibel)]

From ubuntu-phone:

Hi,

I digged into this, esp. into why the mounted microSD was busy; there is
a process running with the name 'mediascan' and as the SD contained some
100.000 files (map tiles of OpsenStreetMap), this would run hours, I think:

phablet@ubuntu-phablet:~$ sudo lsof 2>/dev/null | fgrep /media/phablet/
mediascan 2077 phablet 13r DIR 179,97 32768 4906 /media/phablet/7895-9F4B/Maps/OSM/18/139590
gdbus 2077 2091 phablet 13r DIR 179,97 32768 4906 /media/phablet/7895-9F4B/Maps/OSM/18/139590
gmain 2077 2323 phablet 13r DIR 179,97 32768 4906 /media/phablet/7895-9F4B/Maps/OSM/18/139590

when you kill this, it comes up again, but when you fire
up the 'umount' right away after the kill, you are lucky:

phablet@ubuntu-phablet:~$ sudo lsof 2>/dev/null | fgrep /media/phablet/
mediascan 7302 phablet 9r DIR 179,97 32768 4900 /media/phablet/7895-9F4B/Maps/OSM/18/139584
gdbus 7302 7304 phablet 9r DIR 179,97 32768 4900 /media/phablet/7895-9F4B/Maps/OSM/18/139584
phablet@ubuntu-phablet:~$ sudo kill -9 7302
phablet@ubuntu-phablet:~$ sudo umount /media/phablet/7895-9F4B

phablet@ubuntu-phablet:~$ mount | fgrep vfat
phablet@ubuntu-phablet:~$

Now I could reformat the card with the SD card app:

SD Card Management --> Format (2 times, 1st error)

it gets mounted and has some initial dirs created by the
SD Card app:

phablet@ubuntu-phablet:~$ mount | fgrep vfat
/dev/mmcblk1 on /media/phablet/882E-8C17 type vfat (rw,nosuid,nodev,relatime,uid=32011,gid=32011,fmask=0022,dmask=0022,codepage=cp437,iocharset=iso8859-1,shortname=mixed,showexec,utf8,flush,errors=remount-ro,uhelper=udisks2)

phablet@ubuntu-phablet:~$ ls -l /media/phablet/882E-8C17
total 20
drwxr-xr-x 2 phablet phablet 4096 Apr 4 10:40 Documents
drwxr-xr-x 2 phablet phablet 4096 Apr 4 10:40 Downloads
drwxr-xr-x 2 phablet phablet 4096 Apr 4 10:40 Music
drwxr-xr-x 2 phablet phablet 4096 Apr 4 10:40 Pictures
drwxr-xr-x 2 phablet phablet 4096 Apr 4 10:40 Videos

SD Card Management --> Unmount works too:

phablet@ubuntu-phablet:~$ mount | fgrep vfat
phablet@ubuntu-phablet:~$

re-inserting the microSD now gives no errors and the card is
mounted:

$ mount | fgrep vfat
/dev/mmcblk1 on /media/phablet/882E-8C17 type vfat (rw,nosuid,nodev,relatime,uid=32011,gid=32011,fmask=0022,dmask=0022,codepage=cp437,iocharset=iso8859-1,shortname=mixed,showexec,utf8,flush,errors=remount-ro,uhelper=udisks2)

phablet@ubuntu-phablet:~$ find /media/phablet/882E-8C17
/media/phablet/882E-8C17
/media/phablet/882E-8C17/Documents
/media/phablet/882E-8C17/Downloads
/media/phablet/882E-8C17/Music
/media/phablet/882E-8C17/Pictures
/media/phablet/882E-8C17/Videos
phablet@ubuntu-phablet:~$ df -kh /media/phablet/882E-8C17
Filesystem Size Used Avail Use% Mounted on
/dev/mmcblk1 7.5G 24K 7.5G 1% /media/phablet/882E-8C17

Last question remains: What does the 'mediascan' exactly und what
will it do when I restore the 100.000 files again? Is there a way
to trimm 'mediascan' that it should ignore some dirs?

Thanks

 matthias

[Matthias Apitz (gubu)]

the answer for the remaining question is: mediascanner does not descent into directories containing a file .nomedia

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.