I'm still trying to recover my data, i did a dd_rescue of the partition only (i regret that, i don't know why i didn't took the whole disk :-( ) unluckily me i got problem to be able to see all the disk i need in my serveur (it's a vm and i miss sata port on the host) i got a sata controller card which is not a recognize by esxi but perfectly working with linux so i'm using gparted live in gparted live the version of mdadm is 3.4 28th january 2016 , on my serveur is mdadm - v3.3-78-gf43f5b3 - 02nd avril 2014 so i am asking myself is it better for me to try to rebuild my the array from my original serveur or from gparted ? i use losetup to make my dd image a dev/loop device and took the risk of start the raid but it doesn't work: i did : mdadm --assemble --force --name=/dev/md0 /dev/sdb1 /dev/sdd1 /dev/loop2 /dev/sdc1 it answer : mdadm: device /dev/sdb1 exist but is not an md array except that is not true, sdb1 and sdd1 are the correct drive. sdc1 is the one saw as a spare so i don't know what to do :-( thank you for your advice PS: sorry for my english it's not my first language -- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html