This is a psa about restoring backups with our version of TWRP. I would advise anybody who can help it NOT to do a full system restore I am on EVR_AL00.
I do not know the details of its implementation but I do know that trying to restore a full system backup from 3 days ago become a huge problem when TWRP failed to properly restore the system and system image partition and the device could not mount them because of corruption. No combination of formatting and restoring seemed to have an impact on the results, but after painfully re-writing my drive many times I saw that the results inconsistently affected /vendor, /data, /system, and /system_image. TWRP did eventually give me a bootable system after running e2fsck -fv on my system partition, BUT it managed to kill the performance of my phone. There was noticeable lag on boot up before I could get full control of my system, but I might not have known if I did not use more cpu intensive tasks, such as viewing videos inside a linux chroot environment. The affect was not small by any means, it destroyed the usability of my environment. I believe that this was do to a failure to properly restore the block information, therefore killing read/write speed. Furthermore, the system was no longer able to boot with the stock boot.img, only through magisk. When I formatted the system_root partition, not realizing it was not included in the backup, it was no longer able to do that....
This become more of a pain in the ass when after restoring the stock erecovery it failed to restore the device, and the inconsistent performance of the huawei bootloader made it at times impossible to access either recovery or the system partition as I went about trying to get a stable system back on my device without erecovery or emui flasher. After messing around flashing different recovery images, eventually erecovery was able to restore the stock rom and I was able to re root my device and restore my TWRP /data backup.
I'm not complaining, as I do appreciate these tools for what they are, but I wanted to put this out there so that somebody could be saved from this experience. Due to my previous experience with TWRP I was happy to do a full system restore, even when I didn't need to, if only just to make sure I could. Turns out that was ill-advised.
I would highly advise that you only restore the /data partition through TWRP unless you absolutely must restore other partitions to recover a device. Through all of this I probably put near a full write cycle on my disk
I do not know the details of its implementation but I do know that trying to restore a full system backup from 3 days ago become a huge problem when TWRP failed to properly restore the system and system image partition and the device could not mount them because of corruption. No combination of formatting and restoring seemed to have an impact on the results, but after painfully re-writing my drive many times I saw that the results inconsistently affected /vendor, /data, /system, and /system_image. TWRP did eventually give me a bootable system after running e2fsck -fv on my system partition, BUT it managed to kill the performance of my phone. There was noticeable lag on boot up before I could get full control of my system, but I might not have known if I did not use more cpu intensive tasks, such as viewing videos inside a linux chroot environment. The affect was not small by any means, it destroyed the usability of my environment. I believe that this was do to a failure to properly restore the block information, therefore killing read/write speed. Furthermore, the system was no longer able to boot with the stock boot.img, only through magisk. When I formatted the system_root partition, not realizing it was not included in the backup, it was no longer able to do that....
This become more of a pain in the ass when after restoring the stock erecovery it failed to restore the device, and the inconsistent performance of the huawei bootloader made it at times impossible to access either recovery or the system partition as I went about trying to get a stable system back on my device without erecovery or emui flasher. After messing around flashing different recovery images, eventually erecovery was able to restore the stock rom and I was able to re root my device and restore my TWRP /data backup.
I'm not complaining, as I do appreciate these tools for what they are, but I wanted to put this out there so that somebody could be saved from this experience. Due to my previous experience with TWRP I was happy to do a full system restore, even when I didn't need to, if only just to make sure I could. Turns out that was ill-advised.
I would highly advise that you only restore the /data partition through TWRP unless you absolutely must restore other partitions to recover a device. Through all of this I probably put near a full write cycle on my disk
