This is a general question about whether it should be possible to effectively undo a mkfs.ext4 on a partition which previously held an ext3 filesystem. I'm just a user, not a developer, so I'm not familiar with the details of where backup superblocks get written etc. I had no luck finding any old filesystem information with testdisk, so I'm wondering whether ext4 might overwrite all the superblocks by coincidence of choosing the same blocks in the partition to write them as mkfs.ext3 did, or something. If the answer to the above is "yes" I'll respond with more specific details if required. Thanks, David. -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html