[SOLVED] Mounting USB EXT4 Partition Fails

[slimjim69]

(16th Aug, 2018 04:59 AM)Nachteule Wrote:  1) anything in the kernel log? (dmesg)
2) Both partitions are ext4?
3) Can you mount /dev/sda1 manually on your Pi3? (sudo mount -t ext4 /dev/sda1 /mnt)
Oh, you already did it, hmmm

Thx Nachteule,
yes, both partitions are ext4 and I did try to mount it manually, which gave me the 'structure needs cleaning' message.
But we might be onto something with your dmesg hint, because it says:

Quote:[ 358.756005] EXT4-fs (sda1): ext4_check_descriptors: Block bitmap for group 0 overlaps block group descriptors
[ 358.756013] EXT4-fs (sda1): group descriptors corrupted!
[ 395.164635] EXT4-fs (sda1): ext4_check_descriptors: Block bitmap for group 0 overlaps block group descriptors
[ 395.164642] EXT4-fs (sda1): group descriptors corrupted!

so there still seems to be something wrong with the FS of SDA1. But e2fsck seems not to see it. Do you know an option that can see or fix it? I have a backup of the most important data on the partition, but I would really like to try to fix this somehow...
Also, I don't know how it even got corrupted...