清除硬盘raid信息

装系统时出现这种问题，不管装什么版本centos，还是PXE or CD-rom都会出现这样的情况：

linux：

https://www.geekpills.com/operating-system/linux/remove-raid-linux

dmraid -a no
ERROR: ddf1: wrong # of devices in RAID set "ddf1_4c5349202020202010000055000000004711471100000a28" [1/2] on /dev/sdb
RAID set "ddf1_4c5349202020202010000055000000004711471100000a28" is not active
RAID set "ddf1_4c5349202020202010000055000000004711471100000a28" is not active

dmraid –a no 命令就是取消active状态，第一行的报错不要管，那是说/dev/sdb上只有1/2raid信息，信息不全，这里也让我们知道是哪张盘存有raid信息，当然，你直接把sdb换张干净的盘也是可以的。
从后两句可以发现，raid阵列已经not active了。

接下来用dmraid –x 来清楚raid信息。
[root@sr150 ~]# dmraid -x
ERROR: ddf1: wrong # of devices in RAID set "ddf1_4c5349202020202010000055000000004711471100000a28" [1/2] on /dev/sdb
About to delete RAID set ddf1_4c5349202020202010000055000000004711471100000a28
WARNING: The metadata stored on the raidset(s) will not be accessible after deletion
Do you want to continue ? [y/n] :
选择y
ERROR: Raid set deletion is not supported in "ddf1" format
显示报错，但是还是删除了，fdisk –l 无raid 信息
然后把分区删除重建，格式化成功，顺利挂载。

windows：