怎么打开系统还原(怎么打开系统还原设置)

之前:

有root权限备份恢复boot/system分区为例

首先检查分区信息:

方法1:

命令:ls-l/dev/block/platform/MTK-msdc . 0/by-name/

root@GiONEE_GBL7319:/ # ls -l /dev/block/platform/mtk-msdc.0/by-name/lrwxrwxrwx root root 2022-05-20 21:16 boot -> /dev/block/mmcblk0p7lrwxrwxrwx root root 2022-05-20 21:16 cache -> /dev/block/mmcblk0p21lrwxrwxrwx root root 2022-05-20 21:16 expdb -> /dev/block/mmcblk0p10lrwxrwxrwx root root 2022-05-20 21:16 flashinfo -> /dev/block/mmcblk0p23lrwxrwxrwx root root 2022-05-20 21:16 frp -> /dev/block/mmcblk0p17lrwxrwxrwx root root 2022-05-20 21:16 keystore -> /dev/block/mmcblk0p14lrwxrwxrwx root root 2022-05-20 21:16 lk -> /dev/block/mmcblk0p5lrwxrwxrwx root root 2022-05-20 21:16 logo -> /dev/block/mmcblk0p9lrwxrwxrwx root root 2022-05-20 21:16 metadata -> /dev/block/mmcblk0p19lrwxrwxrwx root root 2022-05-20 21:16 nvdata -> /dev/block/mmcblk0p18lrwxrwxrwx root root 2022-05-20 21:16 nvram -> /dev/block/mmcblk0p2lrwxrwxrwx root root 2022-05-20 21:16 oemkeystore -> /dev/block/mmcblk0p12lrwxrwxrwx root root 2022-05-20 21:16 para -> /dev/block/mmcblk0p6lrwxrwxrwx root root 2022-05-20 21:16 proinfo -> /dev/block/mmcblk0p1lrwxrwxrwx root root 2022-05-20 21:16 protect1 -> /dev/block/mmcblk0p3lrwxrwxrwx root root 2022-05-20 21:16 protect2 -> /dev/block/mmcblk0p4lrwxrwxrwx root root 2022-05-20 21:16 recovery -> /dev/block/mmcblk0p8lrwxrwxrwx root root 2022-05-20 21:16 seccfg -> /dev/block/mmcblk0p11lrwxrwxrwx root root 2022-05-20 21:16 secro -> /dev/block/mmcblk0p13lrwxrwxrwx root root 2022-05-20 21:16 system -> /dev/block/mmcblk0p20lrwxrwxrwx root root 2022-05-20 21:16 tee1 -> /dev/block/mmcblk0p15lrwxrwxrwx root root 2022-05-20 21:16 tee2 -> /dev/block/mmcblk0p16lrwxrwxrwx root root 2022-05-20 21:16 userdata -> /dev/block/mmcblk0p22

引导分区对应的实际目录是/dev/block/mmcblk0p7。

方法二:

相关信息也可以在根目录/下的fstab.xxx和/dev/recovery.fstab中找到。

副本:

方法一:猫

命令：cat /dev/block/mmcblk0p7 > /sdcard/bootBAK.img命令:cat/dev/block/mmcblk 0 p 7 >:/SD card/boot bak . img

root@GiONEE_GBL7319:/ # cat /dev/block/mmcblk0p7 > /sdcard/bootBAK.img

查看结果:

root@GiONEE_GBL7319:/ # ls -l /sdcard/boot*-rw-rw---- root sdcard_r 7145472 2015-06-30 07:04 boot.img-rw-rw---- root sdcard_r 16777216 2022-05-20 21:45 bootBAK.img-rw-rw---- root sdcard_r 7485440 2022-02-28 08:22 bootF103_magisk.img

bootBAK.img大小是16777216字节bootBAK.img的大小是16777216字节。

比较:

首先检查分区大小。

命令:cat/proc/分区

root@GiONEE_GBL7319:/ # cat /proc/partitionsmajor minor #blocks name 254 0 491520 zram0 7 0 18944 loop0 179 0 15267840 mmcblk0 179 1 3072 mmcblk0p1 179 2 5120 mmcblk0p2 179 3 10240 mmcblk0p3 179 4 10240 mmcblk0p4 179 5 512 mmcblk0p5 179 6 512 mmcblk0p6 179 7 16384 mmcblk0p7 对应boot分区 179 8 16384 mmcblk0p8 179 9 8192 mmcblk0p9 179 10 10240 mmcblk0p10 179 11 512 mmcblk0p11 179 12 2048 mmcblk0p12 179 13 6144 mmcblk0p13 179 14 8192 mmcblk0p14 179 15 5120 mmcblk0p15 179 16 5120 mmcblk0p16 179 17 1024 mmcblk0p17 179 18 32768 mmcblk0p18 179 19 37888 mmcblk0p19 179 20 2097152 mmcblk0p20 179 21 409600 mmcblk0p21 179 22 12563968 mmcblk0p22 179 23 16384 mmcblk0p23 179 96 4096 mmcblk0rpmb 179 64 4096 mmcblk0boot1 179 32 4096 mmcblk0boot0

mmcblk0p7的块为16384个，每个块的大小为1024字节。

引导大小= 16384 * 1024 = 1677216字节，与备份的大小相同。

方法2: dd

命令：dd if=/dev/block/mmcblk0p7 of=/sdcard/bootBAK2.img命令:DD if =/dev/block/MMC blk 0 p 7 of =/SD card/boot bak 2 . img

1|root@GiONEE_GBL7319:/ # dd if=/dev/block/mmcblk0p7 of=/sdcard/bootBAK2.img32768+0 records in32768+0 records out16777216 bytes transferred in 2.001 secs (8384415 bytes/sec)

或者:

dd if=/dev/block/mmcblk0p7 of=/sdcard/bootBAK2.img bs=1024 count=16384

命令描述:

if表示输入（数据源）of表示输出（备份到哪）bs即blockscount是多少个bs

结果:

root@GiONEE_GBL7319:/ # ls -l /sdcard/boot*-rw-rw---- root sdcard_r 7145472 2015-06-30 07:04 boot.img-rw-rw---- root sdcard_r 16777216 2022-05-20 21:45 bootBAK.img-rw-rw---- root sdcard_r 16777216 2022-05-20 21:56 bootBAK2.img-rw-rw---- root sdcard_r 7485440 2022-02-28 08:22 bootF103_magisk.img

方法3: cpio

命令:find/system-print | cpio-ovd-h newc >:/SD card/system . cpio backup/system

root@GiONEE_GBL7319:/ # find /system -print | busybox cpio -ovd -H newc > /sdcard/system.cpioroot@GiONEE_GBL7319:/ # ls -l /sdcard/system*-rw-rw---- root sdcard_r 1916820332 2022-05-25 23:11 system.cpioroot@GiONEE_GBL7319:/ # file /sdcard/system.cpio/sdcard/system.cpio: ASCII cpio archive (SVR4 with no CRC)

方法4:焦油

命令:tarcvzpf system-bak 0526 . tar . gz-exclude =/system/lost+found-exclude =/system/recovery-from-boot . bak/system

排除。/lost+found，备份/system时的recovery-from-boot.bak。

首先检查/系统数据:

c:\tmp\fastboot>adb shellshell@GiONEE_GBL7319:/ $ suroot@GiONEE_GBL7319:/ # ls /systemappbinbuild.propdataetcfontsframeworkliblib64lost+foundmediapluginpriv-apprecovery-from-boot.bakresttsusrvendorxbin

执行备份:

root@GiONEE_GBL7319:/ # cd /sdcardroot@GiONEE_GBL7319:/sdcard # busybox tar cvzpf system-bak0526.tar.gz --exclude=/system/lost+found --exclude=/system/recovery-from-boot.bak /system

参数描述:

-c 建立压缩文件-x 解开压缩文件-v 显示列表-z 用gzip进行压缩-p 保留原来的属性-f 指定压缩文档名--exclude 排除的文件或目录

查看结果:

root@GiONEE_GBL7319:/sdcard # ll sys*-rw-rw---- root sdcard_r 1132545851 2022-05-26 16:04 system-bak0526.tar.gz130|root@GiONEE_GBL7319:/sdcard # busybox tar -tf system-bak0526.tar.gz|grep flash_imagesystem/xbin/flash_image

=================================

恢复区域/数据:

方法1: dd

命令：dd if=/sdcard/bootBAK2.img of=/dev/block/mmcblk0p7命令:DD if =/SD卡/boot bak 2 . img of =/dev/block/mmcblk 0 p 7

root@GiONEE_GBL7319:/ # dd if=/sdcard/bootBAK2.img of=/dev/block/mmcblk0p7

方法2:快速启动闪存

命令：fastboot flash boot bootBAK2.img命令:fastboot flash boot bootBAK2.img

c:\tmp\fastboot>adb reboot bootloaderc:\tmp\fastboot>fastboot devices8T8HBIZSBU9PCM4S fastbootc:\tmp\fastboot>fastboot flash boot bootBAK2.img

方法3: flash_image

命令：flash_image partition file.img命令:flash_image分区文件. img

有时分区不能识别引导，所以尝试/dev/block/mmcblk0p7。

root@GiONEE_GBL7319:/ # flash_image boot /sdcard/bootBAK2.imgfailed with error: -1root@GiONEE_GBL7319:/ # flash_image /dev/block/mmcblk0p7 /sdcard/bootBAK2.img

方法4: cpio

命令:cpio-iuvd

参数描述:

-i 将数据文件复制到系统中，copy-in-o 将系统数据复制成文件，copy-out-u 自动将较新文件覆盖旧文件-v 显示清单-d 自动建立目录-p 原版备份，不进行额外处理-H format

格式具有以下格式:

bin : The obsolete binary format. (2147483647 bytes)odc : The old (POSIX.1) portable format. (8589934591 bytes)newc : The new (SVR4) portable format, which supports file systems having more than 65536 i-nodes. (4294967295 bytes)

此外:

Dd命令可以备份:文件，分区，磁盘，光盘等。

使用说明:

Usage: dd [if=FILE] [of=FILE] [ibs=N obs=N/bs=N] [count=N] [skip=N] [seek=N] [conv=notrunc|noerror|sync|fsync] [iflag=skip_bytes|fullblock] [oflag=seek_bytes|append]Copy a file with converting and formatting if=FILE Read from FILE instead of stdin of=FILE Write to FILE instead of stdout bs=N Read and write N bytes at a time ibs=N Read N bytes at a time obs=N Write N bytes at a time count=N Copy only N input blocks skip=N Skip N input blocks seek=N Skip N output blocks conv=notrunc Don't truncate output file conv=noerror Continue after read errors conv=sync Pad blocks with zeros conv=fsync Physically write data out before finishing conv=swab Swap every pair of bytes iflag=skip_bytes skip=N is in bytes iflag=fullblock Read full blocks oflag=seek_bytes seek=N is in bytes oflag=append Open output file in append mode status=noxfer Suppress rate output status=none Suppress all outputN may be suffixed by c (1), w (2), b (512), kB (1000), k (1024), MB, M, GB, G

/dev/null:回收站

/dev/zero:生成了0个字符