Galaxy Note 5 suddenly stopped booting up and in recovery mode has dm-verity and failed to mount errors?



  • All of sudden when I was trying to use my note 5 (unroot), I noticed that it was powered off and I couldn't power it on with power button. Can you please tell me if there is a way I can recover data on my phone without losing them? I also have Google Authenticator which is connected to many accounts online, If I lose data I will lose everything! Here is what I tried so far:

    First thing I did was a soft reset ( power button + volume down) and the mobile turned on but unfortunately it kept looping on the Samsung logo screen. Then, I tried to go to recovery mode (power button + home button + volume up) and from there I tried "reboot system now", "wiping cache partition (which I hope it doesn't remove any data?)" and "Run graphics test: which failed with error no command and then wiping cached data" all of them without success. One thing I noticed in the bottom section of recovery mode there are these errors:

    ODIN MODE
    DOWNLOAD SPEED: FAST
    PRODUCT NAME: SM-N920C
    CA_ TYPE: CA_2
    CURRENT BINARY: Samsung Official
    SYSTEM STATUS: Official
    FRP LOCK: ON
    Secure Download : Enabled
    KNOX WARRANTY VOID: 0 (0x0000)
    RP SWREV: B:5 K:0 S:1
    

    Android Recovery
    samsung/nobleltejv/noblelte
    7.0/NRD90M/N920CXXS5CRH1
    user/release-keys

    No Support SINGLE-SKU
    Supported API: 3
    dm-verity error...
    E: failed to mount /system (Invalid argument)



  • You could try to flash all partition images (except userdata.img) via heimdall command line

    heimdall flash --BOOTLOADER sboot.bin --CM cm.bin --PARAM param.bin --BOOT boot.img --RECOVERY recovery.img --RADIO modem.bin --SYSTEM system.img --CACHE cache.img --HIDDEN hidden.img
    

    The above example command is created from partition list. This is how you get pit file

    • install https://www.glassechidna.com.au/heimdall , https://www.python.org and https://www.xda-developers.com/samloader-download-updates-samsung-galaxy

    • download and decrypt stock ROM for your region code

      C:\Android\samloader>samloader -m SM-N920C -r AFR checkupdate
      N920CXXS5CRH1/N920COJV4CRB3/N920CXXU5CRH1/N920CXXS5CRH1
      

      C:\Android\samloader>samloader -m SM-N920C -r AFR download -v N920CXXS5CRH1/N920COJV4CRB3/N920CXXU5CRH1/N920CXXS5CRH1 -O .
      downloading SM-N920C_1_20180820163853_vvggswhd8u_fac.zip.enc4
      [################################] 38453/38453 - 00:06:20

      C:\Android\samloader>samloader -m SM-N920C -r AFR decrypt -v N920CXXS5CRH1/N920COJV4CRB3/N920CXXU5CRH1/N920CXXS5CRH1 -V 4 -i SM-N920C_1_20180820163853_vvggswhd8u_fac.zip.enc4 -o SM-N920C_1_20180820163853_vvggswhd8u_fac.zip
      [################################] 615247/615247 - 00:01:21

    • unpack files from zip

      C:\Android\samloader>7z l SM-N920C_1_20180820163853_vvggswhd8u_fac.zip
      

      7-Zip 18.01 (x64) : Copyright (c) 1999-2018 Igor Pavlov : 2018-01-28

      Scanning the drive for archives:
      1 file, 2520047837 bytes (2404 MiB)

      Listing archive: SM-N920C_1_20180820163853_vvggswhd8u_fac.zip

      --
      Path = SM-N920C_1_20180820163853_vvggswhd8u_fac.zip
      Type = zip
      Physical Size = 2520047837
      64-bit = +
      Characteristics = Zip64

      Date Time Attr Size Compressed Name


      2018-08-20 16:39:50 ..... 5058737 1491256 BL_N920CXXS5CRH1_CL11762721_QB19211222_REV00_user_low_ship.tar.md5
      2018-08-20 16:39:50 ..... 4797583545 2248597336 AP_N920CXXS5CRH1_CL11762721_QB19211222_REV00_user_low_ship_meta.tar.md5
      2018-08-20 16:44:16 ..... 38092989 38093065 CP_N920CXXU5CRH1_CP10334463_CL11762721_QB19211222_REV00_user_low_ship.tar.md5
      2018-08-20 16:44:18 ..... 273756344 231865000 CSC_OJV_N920COJV4CRB3_CL11762721_QB16863364_REV00_user_low_ship.tar.md5


      2018-08-20 16:44:18 5114491615 2520046657 4 files

    • extract pit from CSC file

      CSC_OJV_N920COJV4CRB3_CL11762721_QB16863364_REV00_user_low_ship.tar.md5
      
    • inspect NOBLELTE_EUR_OPEN_HIDDEN150M.pit pit file with https://forum.xda-developers.com/showthread.php?t=1916936 or https://forum.xda-developers.com/showthread.php?t=2953072




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