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Root [Guide] Full ROM Backup/Dump And Restore For Micromax A90 (SPFT + CWMR Method)

Creating A Dump\Backup

Note: Root Required

1. Set "Settings" -> "Display" -> "Sleep" -> "10 minutes"

2. Install or update "Busybox" from play store

3. Set your phone to "Airplane" mode

4. Make sure that the card is not less than 2Gb of free space

5. Use any one of the following:

View attachment BakupTool_sdcard.zip saves a backup copy on the path: /mnt/sdcard/backup_v2

View attachment BakupTool_sdcard2.zip saves a backup copy on the path: /mnt/sdcard2/backup_v2

6. Extract the BakupTool_* to sdcard. Full path to the file should be: / sdcard / gscript

7. Install program: /sdcard /gscript /"GScriptLite.apk"

8. Open the program "GScriptLite". Press "Menu button" -> "Add Script"

9. Set tick "Needs SU"

10. Click "Load file" and select "back_mt657x.sh"

11. Click the button "Save"

12. Tap on a new script, "back_mt657x.sh". After that give the program root permissions if asked and wait for 5- 10 minutes. Do not use the phone during the process.

A sign of a normal shutdown of the script is:
Message in the terminal:
100% Backup Complite!!!
Saved to / sdcard/backup_v2/GGGGMMDD-ChChmm
Star Time: hh: mm: ss; End Time: hh: mm: ss

The appearance at the root of SD-card phone the following structure of folders and files:

backup_v2
YYYYMMDD-hhmm
* BDRS-YYYYMMDD-hhmm
boot.img
cache.ext4.tar
data.ext4.tar
nandroid.md5
recovery.img
system.ext4.tar
* misk
cache.img
cmdline.info
config.info
cpu.info
nvram.img
nvram.tar
ram.info
rom.info
* over
expdb.raw
full_preloader_part.raw
misc.raw
pmt.raw
sec_ro.raw
seccfg.raw
unknown.raw

boot.img
dsp_bl.img
ebr1.img
firmware.info
MT6577_a4_v2c.info
logo.img
mbr.img
preloader.img
recovery.img
system.img
uboot.img
data.img


Restoring A Dump\Backup

There are two methods to restore the backup/dump.

Method 1: SP Flash Tool

1. Move the backup_v2 folder from "SDcard" ("Phone storage" if you have used script from BakupTool_sdcard2.zip) to your windows PC.

2. Download and unzip/extract View attachment MTK6575 Drivers.zip on your Windows PC, just run InstallDriver.exe to install drivers.

3. Download View attachment preloader + scatter (micromax a90).zip and View attachment SP_Flash_Tool_v3.1207.03.zip, unzip/extract them

4. Open extracted preloader + scatter (micromax a90) folder and move "preloader_gionee75_cu_ics.bin" and "MT6575_Android_scatter_emmc.txt" to backup_v2\YYYYMMDD-hhmm\

5. Now open extracted SP Flash Tool folder and run Flash_tool.exe

6. Click on "Scatter-loading" button which is on the right side below Downloading Agent. A new window will open. Browse to backup_v2\YYYYMMDD-hhmm\ folder and select MT6575_Android_scatter_emmc.txt file. A error message will occur, but ignore that and click OK

7. Flash tool will populate the Map file on the application window. You will see multiple entries. Uncheck DSP_BL, SEC_RO, EBR2 and FAT.

8. Now,
Click on PRELOADER and browse to backup_v2\YYYYMMDD-hhmm\ and select "preloader_gionee75_cu_ics.bin"
Click on MBR and browse to backup_v2\YYYYMMDD-hhmm\ and select "mbr.img"
Click on EBR1 and browse to backup_v2\YYYYMMDD-hhmm\ and select "ebr1.img"
Click on UBOOT and browse to backup_v2\YYYYMMDD-hhmm\ and select "uboot.img"
Click on BOOTIMG and browse to backup_v2\YYYYMMDD-hhmm\ and select "boot.img"
Click on RECOVERY and browse to backup_v2\YYYYMMDD-hhmm\ and select "recovery.img"
Click on LOGO and browse to backup_v2\YYYYMMDD-hhmm\ and select "logo.img"
Click on ANDROID and browse to backup_v2\YYYYMMDD-hhmm\ and select "system.img"
Click on CACHE and browse to backup_v2\YYYYMMDD-hhmm\misk and select "cache.img"
Click on USRDATA and browse to backup_v2\YYYYMMDD-hhmm\ and select "data.img"

9. Click on "Download". Warning message will occur, but ignore that and click Yes

10. You will see in the status bar below "Searching", now connect your phone (without battery inserted) via the USB cable

11. Wait for the process to finish and then you will get a window showing green circle

Congrats! You have flashed your backup

Method 2: Clockworkmod Recovery Method

1. Flash the CWM recovery using the guide given here http://androidforums.com/micromax-a90/644776-recovery-cwm-recovery-v5-5-0-4-a.html

2. After successfully flashing the CWM recovery open File Manager and click on SD Card (Click on Phone storage if you have used script from BakupTool_sdcard2.zip)

3. Create new folder "clockworkmod". Open it and again create new folder "backup"

4. Now go to the root of your SD Card (go to the root of your Phone storage if you have used script from BakupTool_sdcard2.zip). Search for "backup_v2" folder, open it and go to "YYYYMMDD-hhmm" folder.

5. Move "BDRS-YYYYMMDD-hhmm" folder to SD Card\clockworkmod\backup (move to Phone storage\clockworkmod\backup if you have used script from BakupTool_sdcard2), after this switch off your phone

6. Switch on the phone with "Volume Up" and "Power" button pressed. The Phone will boot into CWM recovery

7. In CWM recovery using volume keys and power button go to "backup and restore" and choose "restore" (choose "restore from internal sdcard" if you have used script from BakupTool_sdcard2)

8. Select the backup "BDRS-YYYYMMDD-hhmm" and choose "Yes - Restore"

9. Wait till CWM recovery restores your backup. When restore completes choose "reboot system now"

Congrats! You have restored your backup

Warning: Please don't use SP Flash Tool to download ROM not meant for your phone, it will brick it. After you have download wrong "PRELOADER", your phone will be completely dead, cannot power on, no charging, no recovery, no USB vcom detection
 
  • Like
Reactions: suasuasu
Would you please help to understand; How the above ROM backup procedure is different from going to CWM recovery > backup and restore > backup ?

This procedure dumps all the rom files which can be flashed by sp flash tool.

It dumps all the files such as boot.img ,dsp_bl.img, ebr1.img, firmware.info, logo.img, mbr.img, recovery.img, system.img, uboot.img etc

It's an alternative method especially for those who do not have CWM Recovery.
 
Upvote 0
Hello Sir,

I encountered problem while taking ROM backup of MMX a90 with Gscript and busybox , the process always do stop at 50 % with error (have attached pictures of error and also kept 5 gb space empty in SD card while doing procedure) kindly help me to solve the error and please do tell alternative ways to take ROM backup for MMXa90.
 
Upvote 0

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