• 安卓备份分区----手动查询安卓系统分区信息 导出系统分区的一些基本操作

    在玩机搞机过程中。有时候需要手动查看有些分区信息，或者备份分区的操作。那么今天以小米8为例解析下其中的操作步骤

    机型：小米8

    adb版本：https://developer.android.com/studio/releases/platform-tools

    机型芯片：高通骁龙845

    手机系统版本：安卓10

    机型界面：twrp

    机型字库：UFS

    查看分区

    1---手机进入twrp模式里安装好联机驱动。然后打开adb输入指令

    adb shell ls -al /dev/block/bootdevice/by-name/界面如下

    1. C:\Users\Administrator\Desktop\adb>adb shell ls -al /dev/block/bootdevice/by-name/
    2. drwxr-xr-x    2 root     root          1740 Aug 10  1970 .
    3. drwxr-xr-x    3 root     root          1880 Aug 10  1970 ..
    4. lrwxrwxrwx    1 root     root            15 Aug 10  1970 ImageFv -> /dev/block/sdf4
    5. lrwxrwxrwx    1 root     root            16 Aug 10  1970 abl_a -> /dev/block/sde32
    6. lrwxrwxrwx    1 root     root            16 Aug 10  1970 abl_b -> /dev/block/sde33
    7. lrwxrwxrwx    1 root     root            16 Aug 10  1970 aop_a -> /dev/block/sde14
    8. lrwxrwxrwx    1 root     root            16 Aug 10  1970 aop_b -> /dev/block/sde15
    9. lrwxrwxrwx    1 root     root            15 Aug 10  1970 apdp -> /dev/block/sde6
    10. lrwxrwxrwx    1 root     root            15 Aug 10  1970 bk01 -> /dev/block/sda3
    11. lrwxrwxrwx    1 root     root            15 Aug 10  1970 bk02 -> /dev/block/sda4
    12. lrwxrwxrwx    1 root     root            15 Aug 10  1970 bk03 -> /dev/block/sda5
    13. lrwxrwxrwx    1 root     root            15 Aug 10  1970 bk04 -> /dev/block/sda8
    14. lrwxrwxrwx    1 root     root            16 Aug 10  1970 bk05 -> /dev/block/sda13
    15. lrwxrwxrwx    1 root     root            15 Aug 10  1970 bk31 -> /dev/block/sdd1
    16. lrwxrwxrwx    1 root     root            15 Aug 10  1970 bk32 -> /dev/block/sdd3
    17. lrwxrwxrwx    1 root     root            15 Aug 10  1970 bk33 -> /dev/block/sdd5
    18. lrwxrwxrwx    1 root     root            15 Aug 10  1970 bk41 -> /dev/block/sde3
    19. lrwxrwxrwx    1 root     root            15 Aug 10  1970 bk42 -> /dev/block/sde9
    20. lrwxrwxrwx    1 root     root            16 Aug 10  1970 bk43 -> /dev/block/sde16
    21. lrwxrwxrwx    1 root     root            16 Aug 10  1970 bk44 -> /dev/block/sde17
    22. lrwxrwxrwx    1 root     root            16 Aug 10  1970 bk45 -> /dev/block/sde25
    23. lrwxrwxrwx    1 root     root            16 Aug 10  1970 bk46 -> /dev/block/sde29
    24. lrwxrwxrwx    1 root     root            16 Aug 10  1970 bk47 -> /dev/block/sde38
    25. lrwxrwxrwx    1 root     root            16 Aug 10  1970 bk48 -> /dev/block/sde40
    26. lrwxrwxrwx    1 root     root            16 Aug 10  1970 bk49 -> /dev/block/sde41
    27. lrwxrwxrwx    1 root     root            15 Aug 10  1970 bk51 -> /dev/block/sdf2
    28. lrwxrwxrwx    1 root     root            15 Aug 10  1970 bk52 -> /dev/block/sdf3
    29. lrwxrwxrwx    1 root     root            15 Aug 10  1970 bk53 -> /dev/block/sdf5
    30. lrwxrwxrwx    1 root     root            16 Aug 10  1970 bluetooth -> /dev/block/sde24
    31. lrwxrwxrwx    1 root     root            16 Aug 10  1970 boot -> /dev/block/sde45
    32. lrwxrwxrwx    1 root     root            16 Aug 10  1970 cache -> /dev/block/sda20
    33. lrwxrwxrwx    1 root     root            15 Aug 10  1970 cdt -> /dev/block/sdd2
    34. lrwxrwxrwx    1 root     root            16 Aug 10  1970 cmnlib64_a -> /dev/block/sde20
    35. lrwxrwxrwx    1 root     root            16 Aug 10  1970 cmnlib64_b -> /dev/block/sde21
    36. lrwxrwxrwx    1 root     root            16 Aug 10  1970 cmnlib_a -> /dev/block/sde18
    37. lrwxrwxrwx    1 root     root            16 Aug 10  1970 cmnlib_b -> /dev/block/sde19
    38. lrwxrwxrwx    1 root     root            16 Aug 10  1970 cust -> /dev/block/sda18
    39. lrwxrwxrwx    1 root     root            15 Aug 10  1970 ddr -> /dev/block/sdd4
    40. lrwxrwxrwx    1 root     root            16 Aug 10  1970 devcfg_a -> /dev/block/sde12
    41. lrwxrwxrwx    1 root     root            16 Aug 10  1970 devcfg_b -> /dev/block/sde13
    42. lrwxrwxrwx    1 root     root            16 Aug 10  1970 devinfo -> /dev/block/sda12
    43. lrwxrwxrwx    1 root     root            16 Aug 10  1970 dip -> /dev/block/sde28
    44. lrwxrwxrwx    1 root     root            16 Aug 10  1970 dsp -> /dev/block/sde44
    45. lrwxrwxrwx    1 root     root            16 Aug 10  1970 dtbo -> /dev/block/sde37
    46. lrwxrwxrwx    1 root     root            15 Aug 10  1970 frp -> /dev/block/sda7
    47. lrwxrwxrwx    1 root     root            15 Aug 10  1970 fsc -> /dev/block/sdf1
    48. lrwxrwxrwx    1 root     root            16 Aug 10  1970 fsg -> /dev/block/sde36
    49. lrwxrwxrwx    1 root     root            16 Aug 10  1970 hyp_a -> /dev/block/sde26
    50. lrwxrwxrwx    1 root     root            16 Aug 10  1970 hyp_b -> /dev/block/sde27
    51. lrwxrwxrwx    1 root     root            16 Aug 10  1970 keymaster_a -> /dev/block/sde22
    52. lrwxrwxrwx    1 root     root            16 Aug 10  1970 keymaster_b -> /dev/block/sde23
    53. lrwxrwxrwx    1 root     root            15 Aug 10  1970 keystore -> /dev/block/sda6
    54. lrwxrwxrwx    1 root     root            15 Aug 10  1970 limits -> /dev/block/sde2
    55. lrwxrwxrwx    1 root     root            16 Aug 10  1970 logdump -> /dev/block/sda16
    56. lrwxrwxrwx    1 root     root            16 Aug 10  1970 logfs -> /dev/block/sda10
    57. lrwxrwxrwx    1 root     root            16 Aug 10  1970 logo -> /dev/block/sde43
    58. lrwxrwxrwx    1 root     root            16 Aug 10  1970 minidump -> /dev/block/sda17
    59. lrwxrwxrwx    1 root     root            15 Aug 10  1970 misc -> /dev/block/sda9
    60. lrwxrwxrwx    1 root     root            16 Aug 10  1970 modem -> /dev/block/sde46
    61. lrwxrwxrwx    1 root     root            15 Aug 10  1970 modemst1 -> /dev/block/sdf6
    62. lrwxrwxrwx    1 root     root            15 Aug 10  1970 modemst2 -> /dev/block/sdf7
    63. lrwxrwxrwx    1 root     root            15 Aug 10  1970 msadp -> /dev/block/sde7
    64. lrwxrwxrwx    1 root     root            16 Aug 10  1970 oops -> /dev/block/sda11
    65. lrwxrwxrwx    1 root     root            16 Aug 10  1970 persist -> /dev/block/sda14
    66. lrwxrwxrwx    1 root     root            16 Aug 10  1970 persistbak -> /dev/block/sda15
    67. lrwxrwxrwx    1 root     root            15 Aug 10  1970 qupfw_a -> /dev/block/sde4
    68. lrwxrwxrwx    1 root     root            15 Aug 10  1970 qupfw_b -> /dev/block/sde5
    69. lrwxrwxrwx    1 root     root            16 Aug 10  1970 recovery -> /dev/block/sda19
    70. lrwxrwxrwx    1 root     root            15 Aug 10  1970 sec -> /dev/block/sde1
    71. lrwxrwxrwx    1 root     root            16 Aug 10  1970 splash -> /dev/block/sde42
    72. lrwxrwxrwx    1 root     root            16 Aug 10  1970 spunvm -> /dev/block/sde39
    73. lrwxrwxrwx    1 root     root            15 Aug 10  1970 ssd -> /dev/block/sda2
    74. lrwxrwxrwx    1 root     root            16 Aug 10  1970 sti -> /dev/block/sde30
    75. lrwxrwxrwx    1 root     root            16 Aug 10  1970 storsec_a -> /dev/block/sde10
    76. lrwxrwxrwx    1 root     root            16 Aug 10  1970 storsec_b -> /dev/block/sde11
    77. lrwxrwxrwx    1 root     root            15 Aug 10  1970 switch -> /dev/block/sda1
    78. lrwxrwxrwx    1 root     root            16 Aug 10  1970 system -> /dev/block/sda21
    79. lrwxrwxrwx    1 root     root            16 Aug 10  1970 toolsfv -> /dev/block/sde31
    80. lrwxrwxrwx    1 root     root            16 Aug 10  1970 tz_a -> /dev/block/sde34
    81. lrwxrwxrwx    1 root     root            16 Aug 10  1970 tz_b -> /dev/block/sde35
    82. lrwxrwxrwx    1 root     root            16 Aug 10  1970 userdata -> /dev/block/sda22
    83. lrwxrwxrwx    1 root     root            15 Aug 10  1970 vbmeta -> /dev/block/sde8
    84. lrwxrwxrwx    1 root     root            16 Aug 10  1970 vendor -> /dev/block/sde47
    85. lrwxrwxrwx    1 root     root            15 Aug 10  1970 xbl_a -> /dev/block/sdb2
    86. lrwxrwxrwx    1 root     root            15 Aug 10  1970 xbl_b -> /dev/block/sdc2
    87. lrwxrwxrwx    1 root     root            15 Aug 10  1970 xbl_config_a -> /dev/block/sdb1
    88. lrwxrwxrwx    1 root     root            15 Aug 10  1970 xbl_config_b -> /dev/block/sdc1

    通过这个指令可以看到手机所有分区对应的分区浩。例如

    lrwxrwxrwx    1 root     root            16 Aug 10  1970 boot -> /dev/block/sde45

    boot分区就是在sde45序号里

    备份分区

    那么知道了分区对应的分区号。如何提取这个boot分区呢

    指令;dd if=/dev/block/sde45 of=/sdcard/boot.img

    然后打开手机存储就有这个分区

    按此方法。可以提取出当前机型所有的分区。在这个界面。例如我们怎么简单方便备份手机最重要的基带分区呢。在usf字库芯片的机型里，基带辅助分区基本全部都在sdf分区里。查看分区xml就可以很清楚的看到

    1. <?xml version="1.0" ?>
    2. <data>
    3.   <!--NOTE: This is an ** Autogenerated file **-->
    4.   <!--NOTE: Sector size is 4096bytes-->
    5.   <program SECTOR_SIZE_IN_BYTES="4096" file_sector_offset="0" filename="" label="fsc" num_partition_sectors="64" partofsingleimage="false" physical_partition_number="5" readbackverify="false" size_in_KB="256.0" sparse="false" start_byte_hex="0x6000" start_sector="6"/>
    6.   <program SECTOR_SIZE_IN_BYTES="4096" file_sector_offset="0" filename="" label="bk51" num_partition_sectors="186" partofsingleimage="false" physical_partition_number="5" readbackverify="false" size_in_KB="744.0" sparse="false" start_byte_hex="0x46000" start_sector="70"/>
    7.   <program SECTOR_SIZE_IN_BYTES="4096" file_sector_offset="0" filename="" label="bk52" num_partition_sectors="256" partofsingleimage="false" physical_partition_number="5" readbackverify="false" size_in_KB="1024.0" sparse="false" start_byte_hex="0x100000" start_sector="256"/>
    8.   <program SECTOR_SIZE_IN_BYTES="4096" file_sector_offset="0" filename="imagefv.elf" label="ImageFv" num_partition_sectors="512" partofsingleimage="false" physical_partition_number="5" readbackverify="false" size_in_KB="2048.0" sparse="false" start_byte_hex="0x200000" start_sector="512"/>
    9.   <program SECTOR_SIZE_IN_BYTES="4096" file_sector_offset="0" filename="" label="bk53" num_partition_sectors="1024" partofsingleimage="false" physical_partition_number="5" readbackverify="false" size_in_KB="4096.0" sparse="false" start_byte_hex="0x400000" start_sector="1024"/>
    10.   <program SECTOR_SIZE_IN_BYTES="4096" file_sector_offset="0" filename="" label="modemst1" num_partition_sectors="2048" partofsingleimage="false" physical_partition_number="5" readbackverify="false" size_in_KB="8192.0" sparse="false" start_byte_hex="0x800000" start_sector="2048"/>
    11.   <program SECTOR_SIZE_IN_BYTES="4096" file_sector_offset="0" filename="" label="modemst2" num_partition_sectors="2048" partofsingleimage="false" physical_partition_number="5" readbackverify="false" size_in_KB="8192.0" sparse="false" start_byte_hex="0x1000000" start_sector="4096"/>
    12.   <program SECTOR_SIZE_IN_BYTES="4096" file_sector_offset="0" filename="" label="last_parti" num_partition_sectors="0" partofsingleimage="false" physical_partition_number="5" readbackverify="false" size_in_KB="0" sparse="false" start_byte_hex="0x1800000" start_sector="6144"/>
    13.   <program SECTOR_SIZE_IN_BYTES="4096" file_sector_offset="0" filename="gpt_main5.bin" label="PrimaryGPT" num_partition_sectors="6" partofsingleimage="true" physical_partition_number="5" readbackverify="false" size_in_KB="24.0" sparse="false" start_byte_hex="0x0" start_sector="0"/>
    14.   <program SECTOR_SIZE_IN_BYTES="4096" file_sector_offset="0" filename="gpt_backup5.bin" label="BackupGPT" num_partition_sectors="5" partofsingleimage="true" physical_partition_number="5" readbackverify="false" size_in_KB="20.0" sparse="false" start_byte_hex="(4096*NUM_DISK_SECTORS)-20480." start_sector="NUM_DISK_SECTORS-5."/>
    15. </data>

    如果单一的进行备份比较麻烦。我们可以把这个sdf分区全部备份下来。指令：

    dd if=/dev/block/sdf of=/sdcard/sdf.bin

    按此方法你也可以备份所有的总分区 sda sdb  sdc sdd sde ,

    恢复分区

    怎么备份的就可以怎么恢复。无非把指令调换了下。例如刚才备份的boot分区和sdf分区

    dd if=/sdcard/boot.img of=/dev/block/sde45

    dd if=/sdcard/sdf.bin of=/dev/block/sdf

     dd if与of指令含义

    dd命令是一个特殊的命令，它使用底层比特复制的方式从源头将数据复制并转换至一个指定的目的地。在Android破解中，在数据和结果必须确切时，dd命令通常被用于将一个映像文件写入内存或文件，从而使其可以在诸如操作系统引导文件等重要过程中被找到和使用。

    dd命令使用如下语法：

    dd if=<源文件> of=<目标文件>

    if（输入文件）参数告诉命令在哪里找源文件。

    of（输出文件）告诉命令将目标文件写到哪里。

    在使用这两个参数时应特别小心：将if和of这两个参数顺序颠倒其结果将会是毁灭性的。

    更多提取方法
    例如使用cat指令也可以提取

    cat /dev/block/sde45 > /sdcard/boot2.img

    可能遇到的问题

    这边提到一个问题，有时候提取后当时查看提取到的分区大小为0.不要着急。这个是没有同步的原因。重新联机下twrp即可显示实际分区大小。有时候需要重启twrp。

    查看分区大小

    通过cat /proc/partitions可以查看分区大小。例如我们刚才备份的boot分区

    当然以上描述的步骤只是纯手动进行备份分区。还可以借助第三方成品工具进行备份和回复。我前面很多博文有过解析。例如在开机界面使用工具箱备份或者9008端口和mtk的BROM模式里进行备份分区。

    感兴趣的可以参考：玩机搞机---安卓机型mtk和高通芯片查看分区 导出分区 备份分区的一些工具分析

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  • 原文地址：https://blog.csdn.net/u011283906/article/details/133130804