All data at old database was disappeared again because some hardware configuration conflicted. What’s happened in fact? HDD data lose when I was changing my RAID 1 to RAID 5. I tried to rescue data from them but unfortunately I am not familiar with LVM architecture.
Luckily, I saved most of data from Samba server at least. Almost much data such as my photos, videos, educated tutorials for server are saved at Samba server directories. I backed up them then I was going to rebuild entire server.
Finally, server goes fine again. This time, I gave up Intel “faked RAID” configuration and installed OS to SSD. Then I moved /home and /var directories to 3 HDDs after I configured to RAID 5 via Linux software RAID. I will jot down those procedures in coming articles.