Bootloop - Problem with the backup of the /data folder

[Sgisixx]

Hi there,

I have tried for two weeks to secure the /data folder of my phone and then to fix the Bootloop, but now i stucked and i dont know how to go on. I hope there are a few of you geniuses could help me further.

Infromations about my phone:
Samsung Galaxy S2
GT-I9100
Android version 2.3.3
GINGERBREAD BOKE1
T-Mobile Austria
Mobile phone has never been rooted

I know, the Android version of my mobile phone is extremely old, but I could never update the version because kies didnt authorized it.

Problem Description:
My phone switched off due to empty batteries. I it turned it on again after a short recharge, have entered the pin and then it suddenly turns off again .. Since I had a Bootlopp and it rebooted at the T-Mobile logo. I really want the phone numbers, calendar entries etc. ..

Previous try:

I have rooted my phone thanks to the thread "howto-android-data-save-and-boot-hanger-fix-samsung-galaxy-s2".

First striking points:
The reboot came now at the Samsung logo.
With the CWM Recovery v5.0.2.3 I tried a backup. But at data i get the message:

Mounting / data failed

Even when I click "mount / data" on "mounts and storage" , i get the message

Cant mount / data

So .. Found finally a way how to mount data and with the help of ADB and these commands:

adb devices 
adb root 
adb shell 
# Mount / dev / block / mmcblk0p10 / data 
After that / data mounted. Made backup and even the backup of / data was successfully executed ..

I checked first the Data folder to assure myself, that the contacts are in it and notice, that there's something wrong with it.. The Data folder is called data.j4fs.tar and not data.ext4.tar ..

I have found nothing in google on the subject, and also do not know why my data folder is named so ..

Have also tried to copy the contacts manually with these commands:

adb pull com.android.providers.calendar / databases / calendar.db 
adb pull com.sec.android.app.memo / databases / Memo.db

But there is always the message:

remote object 'com.android.providers.calendar / databases / calendar.db' does not exist 
remote object 'com.android.providers.memo / databases / memo.db' does not exist

Furthermore, I have downloaded the Chainfire Recovery for KE2 and tried to mount the data with these commands:

adb devices 
adb shell 
$ rootsh 
# Mount / dev / block / mmcblk0p10 / data

But shortly after my phone reboots or crashes ..

I honestly do not know how to get to my contacts and really hope that someone here has enough knowledge and can help me ..

I get this, when i write ls -l

C:\Windows\system32>adb shell
# mount
mount
rootfs on / type rootfs (rw)
tmpfs on /dev type tmpfs (rw,relatime,mode=111)
devpts on /dev/pts type devpts (rw,relatime,mode=600)
proc on /proc type proc (rw,relatime)
sysfs on /sys type sysfs (rw,relatime)
tmpfs on /tmp type tmpfs (rw,relatime,mode=755)
/dev/block/mmcblk0p9 on /system type ext4 (rw,relatime,barrier=1,data=ordered)
/dev/block/mmcblk0p1 on /efs type ext4 (rw,nosuid,nodev,noatime,barrier=1,data=ordered)
/dev/block/mmcblk0p4 on /mnt/.lfs type j4fs (rw,relatime)
/dev/block/mmcblk0p7 on /cache type ext4 (rw,nodev,noatime,nodiratime,barrier=1, data=ordered)

I really hope, that someone could help me.
Greetings, sigi