參考網站：
6.3.5. Removing a RAID Device
mdadm软RAID的删除方法和注意事项 – 猴叔的博客 – 51CTO技术博客
1. 顯示目前 RAID 狀態
# mdadm –detail /dev/md0 | tail -n 4
Number Major Minor RaidDevice State
0 8 1 0 active sync /dev/sdb1
1 8 17 1 active sync /dev/sdc1
2 8 33 2 active sync /dev/sdd1
2. 停用 RAID
# mdadm –stop /dev/md0
mdadm: stopped /dev/md0[@more@]3. 移除 RAID
# mdadm –remove /dev/md0
4. 移除 superblocks
# mdadm –zero-superblock /dev/sdb1 /dev/sdc1 /dev/sdd1 /dev/sde1