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I have an android system.img I want to remove the read-only flag so that I can mount and edit it I once saw it somewhere but I can't seem to find the article. maybe it has to do with removing shared_blocks?! I can mount -o ro system.img but when I do mount -o rw I get

mount: /mnt/system: wrong fs type, bad option, bad superblock on

I tried tune2fs -O ^read-only system.img and e2fsck -fy -E unshare_blocks system.img it still doesn't mount rw

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  • inverse of unix.stackexchange.com/questions/208851/… Commented Dec 23, 2021 at 1:44
  • Your system.img file isn't an ext4 partition. ext4 tools won't work. Use file -k system.img to investigate. While it's mounted, mount | grep system. Read man mount file. Commented Dec 23, 2021 at 6:13
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    @waltinator it is ext4 formated with EXT4_FEATURE_RO_COMPAT_SHARED_BLOCKS Commented Dec 23, 2021 at 7:37

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It turns out resize2fs temporarily fixes the problem. I had to run resize2fs system.img size with a size to grow the partition.

Instead I did grow the partition by double its size and performed e2fsck -fy -E unshare_blocks system.img now when I mount it works fine

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