On Sat, Jan 19, 2019 at 11:39:57AM -0500, Romulo Albuquerque wrote: > In short, I was able to get it clean, but I'm not able to mount it, > this is how it looks now: - old + new /dev/sdb1: - Data Offset : 2048 sectors + Data Offset : 4096 sectors - Device Role : Active device 4 + Device Role : Active device 3 So. You have the wrong data offset. You have the wrong drive order or maybe, your device names changed. There could be more things, I didn't check. > so, checked it with fsck.ext4 -f: do not run the file system crunch killer. > Do I have any chance to mount it? Full stop. Overlays. Use them: https://raid.wiki.kernel.org/index.php/Recovering_a_failed_software_RAID#Making_the_harddisks_read-only_using_an_overlay_file Things to look out for when using mdadm --create: https://unix.stackexchange.com/a/131927/30851 Good luck Andreas Klauer