So guys I got panicked since my data gone, I tried the solution to use backup Superblock from this askubuntu page but still no luck. but when I tried sudo fsck.ext4 -vy /dev/md0 I got this message /dev/md0/ clean, 11/244178944 files, blablablah.
this is the screenshot I get from sudo fsck.ext4
Do I still have a chance to recover that 244000++ files? the guy from the link said when suitable superblock has been found, I can recover the data, Did I use the wrong superblock?
edit So I did the sudo blkid and what I get is this one
dev/sda1, sdb, sdd1, and sdc is the Raid HDD that contains the whole file that I meant. So what can I do next?