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products:sbc:vim1s:development:erase-emmc [2022/08/23 00:25] hyphop [How-to check boot-loaders content] |
products:sbc:vim1s:development:erase-emmc [2022/08/24 01:59] hyphop [How-to check boot loaders content] |
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eMMC boot-loader can be stored on ''/ | eMMC boot-loader can be stored on ''/ | ||
- | ==== Cleanup eMMC boot-loaders ==== | + | ==== Cleanup eMMC boot loaders ==== |
Cleanup special eMMC boot areas. | Cleanup special eMMC boot areas. | ||
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<WRAP important > | <WRAP important > | ||
- | ''/ | + | ''/ |
</ | </ | ||
- | Universal method for cleanup all eMMC boot-areas. | + | ==== Universal method for cleanup all eMMC boot-areas |
```sh | ```sh | ||
- | sudo dd if=/ | ||
sudo dd if=/ | sudo dd if=/ | ||
+ | sudo dd if=/ | ||
``` | ``` | ||
- | ==== Get block-device names for boot-loaders ==== | + | ==== Get block device names for boot loaders ==== |
Get block-device names for special boot areas. | Get block-device names for special boot areas. | ||
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/ | / | ||
``` | ``` | ||
+ | <WRAP important > | ||
+ | ''/ | ||
+ | </ | ||
Get eMMC block-device name. | Get eMMC block-device name. | ||
Line 101: | Line 104: | ||
``` | ``` | ||
- | <WRAP important > | + | ==== How to check boot loaders content ==== |
- | ''/ | + | |
- | </ | + | |
- | + | ||
- | ==== How-to check boot-loaders content ==== | + | |
This example display empty content for special boot-loaders areas. | This example display empty content for special boot-loaders areas. | ||
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``` | ``` | ||
- | Display same but for other boot-areas names. | + | Display same but for other boot areas names. |
```shell | ```shell | ||
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``` | ``` | ||
- | Next example display valid boot-loader header '' | + | Next example display valid boot loader header '' |
```shell | ```shell | ||
- | ~$ dd if=/dev/mmcblk2 | + | ~$ dd if=/dev/mmcblk0 |
00000000 | 00000000 | ||
``` | ``` |