1. 查看磁盘分区,做raid5 最少需要3块盘 lsblk[root@localhost ~]# lsblk NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINTS sda 8:0 0 127G 0 disk ├─sda1 8:1 0 600M 0 part /boot/efi ├─sda2 8:2 0 1G 0 part /boot └─sda3 8:3 0 125.4G 0 part ├─cs-root 253:0 0 70G 0 lvm / ├─cs-swap 253:1 0 7.…