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nexus/wiki/concepts/过渡固件.md

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# 过渡固件
## Definition
用于引导路由器从原厂固件状态进入可刷入目标固件状态的中间固件文件。
## Definition (English)
A transitional firmware file that bridges the router's original factory firmware to the target third-party firmware state.
## Formats
- `.chk` — 网件路由器专用过渡固件格式
- `.w` — 梅林固件正式版本格式
## Why It's Needed
网件路由器的Bootloader不支持直接从原厂固件跳转到梅林固件需要.chk过渡固件作为中间状态来完成这一转换。
## Process Flow
```
原厂固件 → .chk过渡固件 → .w梅林固件
```
## Common Mistakes
**直接刷.w固件** → 会导致刷机失败
**必须先刷.chk** → 再刷.w
## Related
- [[固件刷入]] — 过渡固件的应用场景
- [[梅林固件]] — 过渡的目标固件
- [[网件RAX50]] — 需要过渡固件的路由器