Hi Heinrich,
On Wed, Jan 27, 2021 at 09:56:13PM +0100, Heinrich Schuchardt wrote:
On 1/27/21 9:19 PM, Gary Bisson wrote:
Fixes issues when switching from GPT to MBR partition tables.
This does not catch all cases of changing the MBR. See function write_mbr_partitions() with writes both the MBR and EBRs (if applicable).
Good catch! That's correct, I missed it for 2 reasons: 1- I focused on the fastboot code which indeed only calls write_mbr_sector() 2- I did that work on 2020.10 U-Boot which didn't include write_mbr_partitions().
Android devices typically have more than 4 partitions. Why does fastboot not update the extended boot records?
Fastboot is not only used for Android, we generally use it to flash our Linux images as well. I guess the code just hasn't been updated to handle EBR although I'd say that most people use GPT, especially Android users.
Anyway, I'll submit a v2 that take care of write_mbr_partitions().
Regards, Gary