This means your SD card is dead for writing: “fsck.ext4: unable to set superblock flags on ROOT”
Posted by jpluimers on 2020/04/24
A while ago I had a "fsck.ext4: unable to set superblock flags on ROOT"
on an SD card in a Raspberry Pi: it basically means the SD card is dead.
Back then Google found only one entry: [WayBack] Bad Superblock – Raspberry Pi Forums
–jeroen
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