> I'm not sure that nuking 2G of the underlying block device is a recoverable error on any filesystem that I'm aware of?

ZFS and btrfs were designed from the start to handle this, by using checksums on every piece of (meta)data and redundancy to return the same data as was stored to the kernel, and rewrite the bad data.

I've tested my own machines running ZFS by random writes out of band from the filesystem/kernel and it has always found and fixed them.