Backup system and user data via CWM.

The device fell into my hands with the latest Russian official firmware 2.3.6 i9003xxle4. Complained that the device began to hang during a call. It takes from a minute to a few seconds of conversation - and the smartphone completely freezes, while the screen remains on.

Immediately began to look at the opportunity unofficial firmware smartphone.

Later firmware (Android 4.4), according to reviews on the Yandex market, is not advised to install: the firmware is too resource-intensive.

I began to pour CM 10.2 according to the instructions from the w3bsit3-dns.com forum.

However, when flashing the smartphone with Odin3 1.83 (and then Odin3 3.04) programs, there was a problem: CWM cannot mount the /sdcard folder, as if something is stopping it.

After selecting the item "wipe data / factory Reset" (the command execution error is circled in the second red frame):

After "mount /sdcard" (command execution error circled in the second red box):

After "choose zip from sdcard" (command execution error circled in second red box):

The most interesting thing is that the smartphone itself seems to work fine.

After the CWM firmware, the device becomes rooted, and after installation and launch root explorer(from the .apk file) you can make sure that the /sdcard folder exists in the phone's memory and contains data.

Solving the error "Error mounting / sdcard"

After reading articles on the Internet on how to fix this error, I realized that CWM may not recognize the / sdcard file system on a smartphone flash drive. I connected my smartphone to the computer via USB cable and looked at the properties of removable drives - the file system on both was designated as FAT32. So that wasn't the problem. But the way to solve the problem became approximately clear: something was wrong with file system. I saved all the necessary files from the smartphone on external media and unmounted and formatted the internal flash memory (while its volume even grew! from 3.5 GB to 7.2 GB), and then formatted the external flash memory. As it turned out, these actions were enough for flashing to CM 10.2.

The first run of the ZIP file updated CWM to version 6.0, further run ZIP file installed CM 10.2. The instruction on w3bsit3-dns.com turned out to be fully working for my device. Hang-ups while talking on the phone disappeared.

Fly in the ointment when changing Android 2.3.6 to Android 4.3

Still, I made one serious mistake when changing the firmware: I relied on the Google contacts synchronization service that it would save my contacts on my smartphone. How wrong I was! After flashing and returning the smartphone to factory settings from phone book smartphone, all contacts have disappeared.

At the same time, I successfully saved and restored SMS and MMS using a special program.

Description of functions and features ClockworkMod Recovery(CWM), as well as an example of creating and restoring a firmware backup and installing a .zip archive.

What is CWM?

CWM is a custom recovery that allows you to backup firmware and user data. In addition, the utility can install third-party software, custom OS builds, and other modifications on the device. ClockworkMod can be installed in place of the factory recovery menu, or next door, making it possible to work with both recovery.

Indicative list ClockworkMod features recovery:

• firmware of various software(from OS builds to simple updates applications);
• installation official updates, as well as third-party modifications and system fixes;
• connection with PC in mass storage mode;
• connecting to a PC for debugging in the ADB terminal;
• backup and restore the firmware and individual areas of the device’s memory (system, settings, applications and data);
• resetting the system to factory settings, clearing cache and dalvik cache, clearing battery statistics;
• work with a memory card.

Where to download and how to install CWM Recovery?

You can download CWM Recovery on the official website clockworkmod.com, or using the recovery builder for your model at - http://builder.clockworkmod.com/

In addition, to download and install CWM recovery you can use the proprietary application CWM ROM Manager.

Description of CWM menu items

Depending on the recovery version, the menu items may differ. However, below are all the main sections and functions of CWM that are present in most assemblies:

• apply update.zip from sdcard– installation of the “update.zip” archive (should be placed in the root of the memory card);
• wipe data/factory reset — full reset settings, data and cache and return to the factory state;
• wipe cache partition— clearing the storage area of ​​temporary files;
• install zip from sdcard— installation of a .zip archive from a memory card (you can choose an archive with any name in any directory of the memory card). Items on this menu:
  • apply update.zip- completely similar to "apply update.zip from sdcard";
  • choose zip from sdcard- select .zip on a removable drive;
  • toggle signature verification— enabling and disabling archive signature verification;
  • toggle script- enable or disable the approval script, which allows you to select priority actions (not intended for everyday tasks).
• backup and restore- creating and restoring a backup of data from various areas of the device's memory. Items on this menu:
  • Backup- creating a backup of the firmware and user data.
  • restore- backup recovery.
  • Advanced Restore— recovery of files from a certain area of ​​memory in a backup.
• mounts and storage- opening write access, working with the device's storage and system partitions. Items on this menu:
  • mount /system- mounting the main firmware partition;
  • unmount /data- unmount the data partition;
  • unmount /cache unmount the temporary file storage partition;
  • mount /sdcard— drive mounting;
  • mount /sd-ext- mounting the Linux partition of the drive;
  • format boot- clearing the boot partition;
  • format system- cleaning the system partition;
  • format data- clearing the data section;
  • format cache- clearing the temporary files section;
  • format sd card- cleaning the drive;
  • format sd-ext- cleaning the Linux partition of the drive;
  • mount USB storage— Connect your device to your computer in mass storage mode.
• advanced — additional functions. Items on this menu:
  • Reboot Recovery- restarting the recovery (if CWM is installed next to the stock one, the stock recovery will be loaded);
  • Wipe Dalvik Cache- cleaning Dalvik cache(in the executive environment ART is useless);
  • Wipe Battery Stat- reset battery statistics (recommended to do after updating or installing a new firmware to create a new calibration file);
  • report error- creating a report on a memory card;
  • key test- display key encoding;
  • Restart adb- restart the ADB terminal (useful if you encounter errors while working with the debugger).
• +++++Go Back+++++- in all menus executes the "back" command.

* Partition mount items indicate commands that will be executed after selecting the corresponding item. Thus, if it says "mount / system", then the system partition in this moment is not mounted and requires a mount command.

Backup system and user data via CWM

Making a backup is quite simple:

1. reboot into CWM;
2. choose " backup & restore«;
3. click " backup«;
4. confirm the choice in the paragraph " Yes and wait;
5. exit CWM using the item " reboot system now«.

Along the way memory card root/clockworkmod/backup, your backup will be placed. Depending on the version of CWM, this may be a folder or an archive with .img or .tar files. The name of the backup, by default, consists of the date and time of the operation. Notes can be added to the name, but only in Latin letters and numbers (in otherwise, the recovery will knock out an error).

Restoring firmware from a backup via CWM

The recovery procedure is just as simple:

1. launch CWM;
2. choose " backup & restore«;
3. click " restore» and looking for the right backup;
4. confirm the choice in the paragraph " Yes«.

If you need to recover data from a specific memory area, do the following:

1. run CWM recovery;
2. choose " backup & restore«;
3. click " Advanced Restore«;
4. looking for the required backup in the list;
5. mark the required section ( boot, system, data, cache, sd-ext);
6. confirm the choice in the paragraph " Yes«.

Installing firmware, kernels and updates via CWM

Before installing anything, be sure to make a backup of the current firmware. Make sure your device battery is more than half charged. Disconnect your smartphone or tablet from your PC, or charger. Place the file to be installed on a memory card (preferably in the root, to make it easier to search). If you are installing new firmware, be sure to clear the user data section with " wipe data/factory reset". Instruction:

1. install the drive in the device;
2. launch CWM;
3. choose " install zip from sdcard«;
4. then press " choose zip from sdcard»and select the required archive;
5. confirm your intentions with the button " Yes» and wait for the installation to finish;
6. then do Wipe cash and advanced/Wipe dalvik-cash;
7. go to the main menu and click reboot system now.

That's all. More detailed instructions to work with CWM, look in the description of the necessary operations in the topics of your devices on the forum.

If you have ever tried to flash or or an Android tablet on your own, you have probably come across the concept of “Recovery”. Today we will talk in detail about what this thing is, why it is needed at all, and of course, how to enter it.

What is Recovery

Recovery mode is a special boot mode for android devices that allows you to do a full reset operating system, reflash the device, make a backup copy of the entire system or its individual partitions (just like restoring these partitions later) and some other things. At the same time, for this mode to work, the performance of the operating system itself is completely optional. Precisely for this recovery menu often treated when the device is no longer working in normal mode. And that is why this mode is called “recovery” (from the English “recovery”).

How to enter Recovery

To boot recovery, the device's hardware buttons are usually used. The most common combinations are:

However, some manufacturers may come up with “something like that”, so you have to look and experiment.

If everything is done correctly, a lying robot will appear on the device screen, on top of which there will be a menu with commands.

Another way to download recovery is special applications, with which you can reboot your smartphone or tablet into recovery mode directly from the operating system itself (for example, the Reboot menu). However, keep in mind that these apps require .

Navigation in recovery mode is done mainly with the volume buttons, and selection with the power button. There are also devices where only the volume down button is used for navigation, and the volume up button is used to confirm the selection.

To all of the above, one important detail must be added. The functionality of the recovery mode itself is by no means universal, and can be quite different depending on the device. Especially distinguished in this sense are “noname” tablets from China and some B-brands, in recovery of which there is no list of commands at all.