android10 (Q) go版本刷GSI失败(MTK平台)

android10 (Q) go版本刷GSI时候,提示如下错误:

$fastboot flash system system.img

Invalid sparse file format at header magic
Resizing 'system'                                  FAILED (remote: 'Not enough space to resize partition')
fastboot: error: Command failed

从提示的错误可以看出是空间不足,需要调整分区。

Android Q 开始有了super分区,想要解决以上的问题,需要增加super分区的大小,增大分区后重新刷GSI,结果如下:

$fastboot flash system system.img

Invalid sparse file format at header magic
Resizing 'system'                                  OKAY [  0.007s]
Sending sparse 'system' 1/4 (261900 KB)            OKAY [ 23.725s]
Writing 'system'                                   OKAY [  4.112s]
Sending sparse 'system' 2/4 (261828 KB)            OKAY [ 23.732s]
Writing 'system'                                   OKAY [  4.986s]
Sending sparse 'system' 3/4 (262032 KB)            OKAY [ 23.334s]
Writing 'system'                                   OKAY [  5.008s]
Sending sparse 'system' 4/4 (49388 KB)             OKAY [  4.487s]
Writing 'system'                                   OKAY [  2.496s]
Finished. Total time: 100.740s

虽然可以刷GSI并正常开机,但是仍有提示Invalid sparse file format at header magic?

这是由于fastboot支持的最大download size小于system.img的大小,需要分批下载来完成,
所以fastboot会将system.img转成sparse file,出现该提示,目前没有发现实质性的影响。

可以通过 -S 来隐藏该提示

fastboot flash -S 800M system system.img

-S 的参数要大于system.img的大小即可

对于空间不足,还看到了另外一种方法,可以参考下:

Use the following command to delete the product partition and free up space for the system
partition. This provides extra space to flash the GSI:

$ fastboot delete-logical-partition product_a

The postfix “_a” should match the slot id of the system partition, such as “system_a” in this
example.

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