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geekjoehome 你指的应该是
https://source.android.com/docs/core/architecture/partitions#designating-critical-partitionsDesignating critical partitions
If the device requires specific partitions or data to run, you must designate those partitions/data as either fully protected or as re-flashable, meaning they are re-buildable, provided, or extractable using a fastboot oem command. This includes data such as per-device factory-specific settings, serial numbers, calibration data, and more.
不过还是那句话,一个型号所有设备通用的 ROM 刷机包(无论是原厂还是第三方),必不可能包含某个设备特定的分区。丢失这个要么是底层救砖全部重刷,要么是刷错,这种情况也会导致基带串号丢失之类的问题。
常规刷机主要是定制 system/recovery/boot 分区,以及相应的元数据,签名之类的。刷机包里包含的 vendor/product 等一般是从官方 ROM 里解包出来,用于确保你使用的 firmware 和 ROM 开发者测试的是同一版本。