my Nokia N900 low memory to app install and 32 GB only shows 3.7Gb error how to solve this. i use recovery-tools test disk app then nothing happened. please help me and mail me to boogiie@yahoo.com. thanks colleguies

First of all: You might want to remove your email address to not get spammed all over the place.

May be your data partition's file system has been corrupted.
Please open the X-Terminal command and run a couple of commands. Please try to copy and paste the command to avoid typing errors, also try to copy and paste the output for best possible support.
Do you have rootsh or some other application installed to gain the rights of 'root'-user?

Please run these commands:

$ root


BusyBox v1.10.2 (Debian 3:1.10.2.legal-1osso30+0m5) built-in shell (ash)
Enter 'help' for a list of built-in commands.

Nokia-N900:~# df
Filesystem 1k-blocks Used Available Use% Mounted on
rootfs 233344 229064 0 100% /
ubi0:rootfs 233344 229064 0 100% /
tmpfs 1024 68 956 7% /tmp
tmpfs 256 80 176 31% /var/run
none 10240 84 10156 1% /dev
tmpfs 65536 4 65532 0% /dev/shm
/opt/pymaemo/usr/lib/python2.5
233344 229064 0 100% /usr/lib/python2.5
/opt/pymaemo/usr/share/pyshared
233344 229064 0 100% /usr/share/pyshared
/opt/pymaemo/usr/lib/pyshared
233344 229064 0 100% /usr/lib/pyshared
/opt/pymaemo/usr/share/python-support
233344 229064 0 100% /usr/share/python-support
/opt/pymaemo/usr/lib/python-support
233344 229064 0 100% /usr/lib/python-support
/dev/mmcblk0p1 3873364 24 3873340 0% /home/user/MyDocs
/dev/mmcblk1p1 3872760 3475080 397680 90% /media/mmc1
Nokia-N900:~# mount
rootfs on / type rootfs (rw)
ubi0:rootfs on / type ubifs (rw,bulk_read,no_chk_data_crc)
proc on /proc type proc (rw)
sysfs on /sys type sysfs (rw)
tmpfs on /tmp type tmpfs (rw,noatime,size=1024k)
tmpfs on /var/run type tmpfs (rw,nosuid,noatime,size=256k,mode=755)
none on /dev type tmpfs (rw,noatime,size=10240k,mode=755)
devpts on /dev/pts type devpts (rw,gid=5,mode=620)
tmpfs on /dev/shm type tmpfs (rw,nosuid,nodev,noatime,size=65536k)
nodev on /sys/kernel/debug type debugfs (0)
/opt/pymaemo/usr/lib/python2.5 on /usr/lib/python2.5 type bind (bind)
/opt/pymaemo/usr/share/pyshared on /usr/share/pyshared type bind (bind)
/opt/pymaemo/usr/lib/pyshared on /usr/lib/pyshared type bind (bind)
/opt/pymaemo/usr/share/python-support on /usr/share/python-support type bind (bind)
/opt/pymaemo/usr/lib/python-support on /usr/lib/python-support type bind (bind)
/dev/mmcblk0p1 on /home/user/MyDocs type vfat (rw,noauto,nodev,noexec,nosuid,noatime,nodiratime, utf8,uid=29999,shortname=mixed,dmask=000,fmask=013 3,rodir)
/dev/mmcblk1p1 on /media/mmc1 type vfat (rw,noauto,nodev,noexec,nosuid,noatime,nodiratime, utf8,uid=29999,shortname=mixed,dmask=000,fmask=013 3,rodir)
Nokia-N900:~# mount
rootfs on / type rootfs (rw)
ubi0:rootfs on / type ubifs (rw,bulk_read,no_chk_data_crc)
proc on /proc type proc (rw)
sysfs on /sys type sysfs (rw)
tmpfs on /tmp type tmpfs (rw,noatime,size=1024k)
tmpfs on /var/run type tmpfs (rw,nosuid,noatime,size=256k,mode=755)
none on /dev type tmpfs (rw,noatime,size=10240k,mode=755)
devpts on /dev/pts type devpts (rw,gid=5,mode=620)
tmpfs on /dev/shm type tmpfs (rw,nosuid,nodev,noatime,size=65536k)
nodev on /sys/kernel/debug type debugfs (0)
/opt/pymaemo/usr/lib/python2.5 on /usr/lib/python2.5 type bind (bind)
/opt/pymaemo/usr/share/pyshared on /usr/share/pyshared type bind (bind)
/opt/pymaemo/usr/lib/pyshared on /usr/lib/pyshared type bind (bind)
/opt/pymaemo/usr/share/python-support on /usr/share/python-support type bind (bind)
/opt/pymaemo/usr/lib/python-support on /usr/lib/python-support type bind (bind)
/dev/mmcblk0p1 on /home/user/MyDocs type vfat (rw,noauto,nodev,noexec,nosuid,noatime,nodiratime, utf8,uid=29999,shortname=mixed,dmask=000,fmask=013 3,rodir)
/dev/mmcblk1p1 on /media/mmc1 type vfat (rw,noauto,nodev,noexec,nosuid,noatime,nodiratime, utf8,uid=29999,shortname=mixed,dmask=000,fmask=013 3,rodir)
Nokia-N900:~# du -kx /home/opt/ | sort -n | tail -n20
du: /home/opt/: No such file or directory
Nokia-N900:~# du -kx /home/user/ | sort -n | tail -n20
56 /home/user/.intellisyncd
56 /home/user/.mozilla
56 /home/user/.mozilla/rtcom
76 /home/user/.local/share/tracker/data
80 /home/user/.local/share/tracker
96 /home/user/.modest
96 /home/user/.modest/cache
100 /home/user/.calendar
160 /home/user/.osso-abook
160 /home/user/.osso-abook/db
172 /home/user/.gstreamer-0.10
208 /home/user/.bookmarks/thumbnails
216 /home/user/.bookmarks
664 /home/user/.cache
664 /home/user/.cache/tracker
2264 /home/user/.backgrounds
7612 /home/user/.local/share/sounds
7692 /home/user/.local
7692 /home/user/.local/share
11664 /home/user
Nokia-N900:~#
Nokia-N900:~#

x-terminal shows avoid results

Looks weird. You may want to educate us about the last steps you did to get to that state.

These are the things i could single out until now:
1. Missing optfs: Basically your file systems seem to be alright, but /dev/mmcblk0p2 is missing completely. This causes the problems of no space to install applications.
2. Your MyDocs partition is only 3.7GB and empty, no files on it.

You better remember what you did lately to try to undo things. And you should try to describe what you hope to setup back to working condition.

Please post the output of The first commands are to check for the health of the internal sd-card. The latter comands are to check for hidden files behind the Mydocs mount point that fill up the rootfs for no obvious reason.
Testdisk is a fine tool to recover files from lost partitions. Best used on unmounted partitions, did you use it while the MyDocs partition was unmounted???

Again, it looks like your MyDocs partition in use is a freshly formatted one.

I have problems with my device too, ""Memory card format unsupported"" . Your code it s ok? for me dont work but you wrote sfdisk -l /dev/mmcblk0 it s oK? mmcblk0 ? I cannot flashing emmc only rootfs I can flashing.

May be the issues of your N900 may be better discussed in a separate thread to get full attention. There are no answer and feedback here anywhere to be found.

Back to your questions: So what is the output of the command There are only small 'L', no decimal 'one', in the command.

remove all apps
install backupmenu
run a live gparted
reseize or not partitions(home must divide to 1024)
format home(ext3 or 4) and MyDocs & sd(if you have problems with it)
reflash firmware
and this is it

Why is that? I have certainly resized my partitions but did not care about rounding to MB. Instead, I tried to round to cylinders to shut up sfdisk. But I can confirm that totally random sizes worked just fine.

how many partitions do you have? how many programs installed? i like the rounding thing , it's sounds better , and neither i have encountered problems with sfdisk because of size(corrupted /home because fapman is another story = 4 coruptions with ext3 an none yet with ext4 , let's hope it stays like this)

sfdisk whinges when partitions do not end on cylinder boundaries, that's all. I have two working devices ATM, both having three partitions. One is stock, the other with 4GB ext4 /home.

But let's stop derailing this thread, shall we? We are waiting for OP's feedback.