安装mdadm

apt-get update && apt-get install mdadm -y

删除存储设备上的现有分区，并创建一个新分区

[~] fdisk /dev/sdb

Welcome to fdisk (util-linux 2.38.1).
Changes will remain in memory only, until you decide to write them.
Be careful before using the write command.

The backup GPT table is not on the end of the device. This problem will be corrected by write.

Command (m for help): d
Partition number (1,14,15, default 15): 

Partition 15 has been deleted.

Command (m for help): d
Partition number (1,14, default 14): 

Partition 14 has been deleted.

Command (m for help): d
Selected partition 1
Partition 1 has been deleted.

Command (m for help): n
Partition number (1-128, default 1): 
First sector (34-97677278, default 2048): 
Last sector, +/-sectors or +/-size{K,M,G,T,P} (2048-97677278, default 97675263): 

Created a new partition 1 of type 'Linux filesystem' and of size 46.6 GiB.

Command (m for help): w
The partition table has been altered.
Calling ioctl() to re-read partition table.
Syncing disks.

[~] fdisk /dev/sdc
...

使用 lsblk -o NAME,SIZE,FSTYPE,TYPE,MOUNTPOINT 列出所有可用设备

[~] lsblk -o NAME,SIZE,FSTYPE,TYPE,MOUNTPOINT
NAME     SIZE FSTYPE TYPE MOUNTPOINT
sda      100G        disk 
├─sda1   512M vfat   part /boot/efi
├─sda2  98.5G ext4   part /
└─sda3   976M swap   part [SWAP]
sdb     46.6G        disk 
└─sdb1  46.6G        part 
sdc     46.6G        disk 
└─sdc1  46.6G        part 
sdd     46.6G        disk 
└─sdd1  46.6G        part 
...

创建 Raid 矩阵

mdadm --create --verbose /dev/md0 --level=0 --raid-devices=3 /dev/sdb1 /dev/sdc1 /dev/sdd1

格式化 Raid 矩阵

mkfs.ext4 /dev/md0

挂载 Raid 矩阵

mkdir /mnt/raid
mount /dev/md0 /mnt/raid

配置自启动

echo '/dev/md0 /mnt/raid ext4 defaults,nofail,discard 0 0' | sudo tee -a /etc/fstab

保存 Raid 配置

mdadm --detail --scan | sudo tee -a /etc/mdadm/mdadm.conf
update-initramfs -u