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2011-04-20
, 13:23
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Posts: 268 |
Thanked: 1,053 times |
Joined on May 2010
@ The Netherlands
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#2
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I've been running my device with MyDocs on a uSD card for a few months now. How to do it:
-Make sure the original MyDocs partition won't be mounted at boot by either removing the partition or marking it as being a non-FAT partition by executing:
*26 is a currently unused partition type
-Add below the line containing "-f /usr/lib/genfstab.awk > $tmp_fstab" in /etc/event.d/rcS-late:
-Add above the line containing "# We can safely continue booting now." in the same file
-Make the last lines of /usr/sbin/osso-usb-mass-storage-enable.sh look like this:
-And do the same for the last lines of /usr/sbin/osso-usb-mass-storage-disable.sh
That should do the trick 
Change mmcblk1p1 in the pieces of code to the device name of the FAT partition you want to use as your new MyDocs.
Credits: http://talk.maemo.org/showthread.php...359#post425359
Last edited by iDont; 2011-04-25 at 18:02.
-Make sure the original MyDocs partition won't be mounted at boot by either removing the partition or marking it as being a non-FAT partition by executing:
Code:
sfdisk -c /dev/mmcblk0 26
-Add below the line containing "-f /usr/lib/genfstab.awk > $tmp_fstab" in /etc/event.d/rcS-late:
Code:
echo "/dev/mmcblk1p1 /home/user/MyDocs vfat $fat_opts 0 0" >> $tmp_fstab
Code:
/bin/mount /home/user/MyDocs
Code:
if [ $# = 1 ]; then
DEV=/dev/mmcblk1p1
STR=`cat $LUN0`
if [ "x$STR" = "x" ]; then
# echo $1 > $LUN0
echo $DEV > $LUN0
else
echo $1 > $LUN1
fi
fi
exit 0
Code:
mount /home/user/MyDocs exit 0
Change mmcblk1p1 in the pieces of code to the device name of the FAT partition you want to use as your new MyDocs.
Credits: http://talk.maemo.org/showthread.php...359#post425359
Last edited by iDont; 2011-04-25 at 18:02.
| The Following 4 Users Say Thank You to iDont For This Useful Post: | ||
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2011-04-25
, 14:47
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Posts: 21 |
Thanked: 7 times |
Joined on Jul 2010
@ Ipswich, England
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#3
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Oh sod! I think I killed it.
I don't know what went wrong there, but now my N900 just keeps showing the white "NOKIA" screen, going blank and then repeating itself.
Plugging a USB cable in while it's completely off shows it attaching to the USB port, then almost immediately disconnecting. And repeating itself.
I fear a re-flash is going to be needed :-(
I don't know what went wrong there, but now my N900 just keeps showing the white "NOKIA" screen, going blank and then repeating itself.
Plugging a USB cable in while it's completely off shows it attaching to the USB port, then almost immediately disconnecting. And repeating itself.
I fear a re-flash is going to be needed :-(
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2011-04-25
, 18:02
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Posts: 268 |
Thanked: 1,053 times |
Joined on May 2010
@ The Netherlands
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#4
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Originally Posted by beermad
This can happen when Maemo can't mount /home. I've been thinking what could've gone wrong, and it seems that I've made a very unfortunate error in my post.
I don't know what went wrong there, but now my N900 just keeps showing the white "NOKIA" screen, going blank and then repeating itself.
Nokia has made Maemo in such a way that it recreates fstab every time it gets booted. The first partition that identifies itself as FAT is used as MyDocs and the first one to identify itself as a Linux native partition is used as /home.
By executing sfdisk -c /dev/mmcblk0 1 83 MyDocs won't get mounted as it identifies itself as not being FAT anymore, but rather as a Linux native partition.
Now Maemo tries to mount it as /home as mmcblk0p1 gets checked earlier than mmcblk0p2. Of course, the content of /home isn't on mmcblk0p1, causing Maemo to get into a reboot loop.
I didn't notice the error as I've partitioned my eMMC differently and changed rcS-late to recreate fstab in a static way.
Originally Posted by beermad
I'm afraid a reflash is required. Flashing only the rootfs should be enough to get your device working again (you won't lose any contact/personal data). Applications will need to be reinstalled probably though.
I fear a re-flash is going to be needed :-(
I've edited my post above to set mmcblk0p1 to a different partition type than 83 to make sure this won't happen to someone else.
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2011-04-25
, 18:09
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Posts: 21 |
Thanked: 7 times |
Joined on Jul 2010
@ Ipswich, England
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#5
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A re-flash was indeed needed. Messy and not fun, but at least I'm (I think) back where I started.
I think I'll wimp out on trying this again and see if I can find another way of achieving what I need (I don't doubt iDont's correction, but cowardice has taken over)...
[edit] Thinking about it, I've got an idea how this could be achieved in a way that shouldn't involve any risk. I'll report back when I've had time to test it out (might take a couple of days, as I've got some website commissions to work on).
Last edited by beermad; 2011-04-26 at 09:15.
I think I'll wimp out on trying this again and see if I can find another way of achieving what I need (I don't doubt iDont's correction, but cowardice has taken over)...
[edit] Thinking about it, I've got an idea how this could be achieved in a way that shouldn't involve any risk. I'll report back when I've had time to test it out (might take a couple of days, as I've got some website commissions to work on).
Last edited by beermad; 2011-04-26 at 09:15.
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2011-04-26
, 15:53
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Posts: 21 |
Thanked: 7 times |
Joined on Jul 2010
@ Ipswich, England
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#6
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OK, here's a way to achieve this. Admittedly a bit of a cludge, but it has the advantage of failing non-fatally.
One limitation is that it won't work if any processes open any files on either the SD card or MyDocs before it's run, as that will prevent the filesystem from being unmounted. As an upstart script it's probably not great, but it's working for me...
If it fails, it tries to restore the system to as close as possible to its original state (eg, re-mounting the original MyDocs partition).
If you've got processes that need to wait for the new MyDocs partition to be ready (for example my MySQL server, whose data files are on MyDocs) this script emits MYDOCS_REPLACED when it's successfully done its job, so you can change the upstart file's "start on" stanza to:
Upstart script replaceMyDocs
One limitation is that it won't work if any processes open any files on either the SD card or MyDocs before it's run, as that will prevent the filesystem from being unmounted. As an upstart script it's probably not great, but it's working for me...
If it fails, it tries to restore the system to as close as possible to its original state (eg, re-mounting the original MyDocs partition).
If you've got processes that need to wait for the new MyDocs partition to be ready (for example my MySQL server, whose data files are on MyDocs) this script emits MYDOCS_REPLACED when it's successfully done its job, so you can change the upstart file's "start on" stanza to:
Code:
start on MYDOCS_REPLACED
Code:
description "unmounts normal MyDocs filesystem and replaces it with the SD card"
# Runs afer rcS-late has mounted everything
start on MOUNTS_OK
console none
script
# Alter the next six lines if necessary for your system
MYDOCS_DEVICE=/dev/mmcblk0p1
SD_DEVICE=/dev/mmcblk1p1
MYDOCS_MOUNTPOINT=/home/user/MyDocs
MYDOCS_FILESYSTEM=vfat
SD_MOUNTPOINT=/media/mmc1
SD_FILESYSTEM=vfat
# Check that MyDocs hasn't already been replaced
if [ ! -z "`mount | grep $MYDOCS_MOUNTPOINT | grep $SD_DEVICE`" ]
then
# Already mounted.
normal exit 0
fi
# It can take a few seconds for MyDocs to actually mount after rsS-late
# has finished, so we'll watch for it
i=0
while [ -z "`mount | grep $MYDOCS_MOUNTPOINT`" -o -z "`mount | grep $SD_MOUNTPOINT`" ]
do
i=$(($i+1))
if [ $i -eq 120 ]
then
# If it hasn't mounted within two minutes, something's gone
# horribly wrong, so we may as well give up
normal exit 0
fi
sleep 1
done
# Get mount options from the fstab file
OPTS=`grep $MYDOCS_MOUNTPOINT /etc/fstab | awk ' { print $4 } '`
# Unmount the SD card
umount $SD_MOUNTPOINT
# Check it unmouted OK
if [ $? -eq 0 ]
then
# Unmount the MyDocs filesystem
umount $MYDOCS_MOUNTPOINT
# Check it unmounted OK
if [ $? -eq 0 ]
then
# Mount the SD on MyDocs
mount $SD_DEVICE -t $SD_FILESYSTEM -o "$OPTS" $MYDOCS_MOUNTPOINT
if [ $? -ne 0 ]
then
# Failed to mount the SD so fall back to original
mount $MYDOCS_DEVICE -t $MYDOCS_FILESYSTEM -o "$OPTS" $MYDOCS_MOUNTPOINT
else
initctl emit MYDOCS_REPLACED
fi
fi
fi
end script
normal exit 0
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2011-05-06
, 15:47
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Posts: 21 |
Thanked: 7 times |
Joined on Jul 2010
@ Ipswich, England
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#7
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Updated version of upstart script. This allows use of proper Linux filesystems.
Code:
description "unmounts normal MyDocs filesystem and replaces it with the SD card"
# Runs afer rcS-late has mounted everything
start on MOUNTS_OK
console none
script
MYDOCS_DEVICE=/dev/mmcblk0p1
SD_DEVICE=/dev/mmcblk1p1
MYDOCS_MOUNTPOINT=/home/user/MyDocs
MYDOCS_FILESYSTEM=vfat
SD_MOUNTPOINT=/media/mmc1
SD_FILESYSTEM=ext3
# Check that MyDocs hasn't already been replaced
if [ ! -z "`mount | grep $MYDOCS_MOUNTPOINT | grep $SD_DEVICE`" ]
then
# Already mounted.
normal exit 0
fi
# It can take a few seconds for MyDocs to actually mount after rsS-late
# has finished, so we'll watch for it
i=0
if [ $SD_FILESYSTEM == "vfat" ]
then
# The SD will auto-mount if if's vfat, but won't otherwise. So if it's vfat
# we want to wait until it's been mounted so we don't interrupt
while [ "`mount | grep $SD_MOUNTPOINT`" ]
do
i=$(($i+1))
if [ $i -eq 120 ]
then
# If it hasn't mounted within two minutes, something's gone
# horribly wrong, so we may as well give up
normal exit 0
fi
sleep 1
done
fi
i=0
while [ -z "`mount | grep $MYDOCS_MOUNTPOINT`" ]
do
i=$(($i+1))
if [ $i -eq 120 ]
then
# If it hasn't mounted within two minutes, something's gone
# horribly wrong, so we may as well give up
normal exit 0
fi
sleep 1
done
if [ $SD_FILESYSTEM == "vfat" ]
then
# Get mount options from the fstab file
OPTS=`grep $MYDOCS_MOUNTPOINT /etc/fstab | awk ' { print $4 } '`
else
# We don't want the mount options from fstab, as some are invalid for
# other filesystems.
OPTS="noauto,nodev,nosuid,noatime,nodiratime"
fi
if [ $SD_FILESYSTEM == "vfat" ]
then
# Unmount the SD card
umount $SD_MOUNTPOINT
# Check it unmouted OK
if [ $? -ne 0 ]
then
exit
fi
fi
# Unmount the MyDocs filesystem
umount $MYDOCS_MOUNTPOINT
# Check it unmounted OK
if [ $? -eq 0 ]
then
# Mount the SD on MyDocs
mount $SD_DEVICE -t $SD_FILESYSTEM -o "$OPTS" $MYDOCS_MOUNTPOINT
if [ $? -ne 0 ]
then
# Failed to mount the SD so fall back to original
mount $MYDOCS_DEVICE -t $MYDOCS_FILESYSTEM -o "$OPTS" $MYDOCS_MOUNTPOINT
else
initctl emit MYDOCS_REPLACED
fi
fi
end script
normal exit 0
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2014-06-11
, 12:41
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Posts: 58 |
Thanked: 134 times |
Joined on Dec 2012
@ Vilnius, Lithuania
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#8
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Any idea how to handle USB Mass Storage mode in elegant way?
Right now I just hack around /usr/sbin/osso-usb-mass-storage-enable.sh and /usr/sbin/osso-usb-mass-storage-disable.sh with umount and mount. My fstab is static
A bit different than in post #2, I believe ke-recv changed since then. Without "umount /home/user/MyDocs", my sdcard which is in /dev/mmcblk0p1 (because of SLOT_NUM exchange in /lib/udev/mmc_id) gets mounted on PC and stays mounted on N900 side.
I guess this is something to do with internal and external card name, but can't find where and who is passing what ;]
Last edited by iceskateclog; 2014-06-11 at 12:48.
Right now I just hack around /usr/sbin/osso-usb-mass-storage-enable.sh and /usr/sbin/osso-usb-mass-storage-disable.sh with umount and mount. My fstab is static
Code:
if [ $# = 1 ]; then
umount /home/user/MyDocs
STR=`cat $LUN0`
if [ "x$STR" = "x" ]; then
echo $1 > $LUN0
else
echo $1 > $LUN1
fi
fi
exit 0
Code:
mount /home/user/MyDocs exit 0
I guess this is something to do with internal and external card name, but can't find where and who is passing what ;]
Last edited by iceskateclog; 2014-06-11 at 12:48.
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2014-06-11
, 16:33
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Posts: 2,102 |
Thanked: 1,937 times |
Joined on Sep 2008
@ Berlin, Germany
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#9
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Never tried it, never needed to, but:
Did you try to simply symlink the external card to MyDocs folder?
Did you try to simply symlink the external card to MyDocs folder?
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2014-06-12
, 07:53
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Posts: 58 |
Thanked: 134 times |
Joined on Dec 2012
@ Vilnius, Lithuania
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#10
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The "problem" is that my eMMC throws I/O errors and I use SDCARD as /home and MyDocs replacement.
/home automatically works correctly with SLOT_NUM /lib/udev/mmc_id trick as /dev/mmcblk0p2, but MyDocs /dev/mmcblk0p1 still gets detected as SDCARD during USB Mass Storage mode. Hence doesn't autounmount from N900
/home automatically works correctly with SLOT_NUM /lib/udev/mmc_id trick as /dev/mmcblk0p2, but MyDocs /dev/mmcblk0p1 still gets detected as SDCARD during USB Mass Storage mode. Hence doesn't autounmount from N900
I seem to have a problem with the MyDocs filesystem, so I'd like to use an SD card instead.
I know I could play around with mountpoints with an upstart script, but it would be infinitely better to somehow persuade the startup to assign and mount it in the first place.