Android emmc信息及坏道检测

EMMC 信息及坏道检测

获取EMMC信息

1. 获取CID:cat /sys/block/mmcblk0/device/cid
2. 获取名称：cat /sys/block/mmcblk0/device/name
3. 获取寿命：cat /sys/block/mmcblk0/device/life_time

坏道检测

使用badblocks工具，默认不会编译此工具，可手动编译

badblocks源码路径：external/e2fsprogs/misc

Usage: ./badblocks [-b block_size] [-i input_file] [-o output_file] [-svwnfBX]
       [-c blocks_at_once] [-d delay_factor_between_reads] [-e max_bad_blocks]
       [-p num_passes] [-t test_pattern [-t test_pattern [...]]]
       device [last_block [first_block]]
       
-b：block大小，默认4K
-i：指定文件，文件中为需要跳过不检测的block
-o：检测后输出到指定文件
-c：每个block检测次数
-s：显示进度
-v：显示详细信息

测试如下：

./badblocks -s -v /dev/block/bootdevice/by-name/system
	Checking blocks 0 to 3145727
	Checking for bad blocks (read-only test): done
	Pass completed, 0 bad blocks found. (0/0/0 errors)