On 30/04/19 09:25, Julien ROBIN wrote: > I'm about to play the following command : > > mdadm --create /dev/md0 --level=5 --raid-devices=3 /dev/sdd1 /dev/sde1 > /dev/sdb1 --assume-clean > > Is it fine ? You clearly haven't read the raid wiki https://raid.wiki.kernel.org/index.php/Linux_Raid It states NEVER EVER use mdadm --create on an existing array unless you (or the person helping you) really knows what they are doing. Another thing it says is always update to the latest mdadm. I don't remember you telling us what version you're using, and the problem you describe sounds very much like something I suspect has been fixed in the latest versions. Not that it matters too much now, you've got your array back, but I would make sure you have the latest mdadm, and read the wiki so you'll know a bit more for next time. Cheers, Wol
