一、查看磁盘挂载状态：

fdisk -l

df -h

二、为其中一个磁盘创建新的分区，参考：

linux用fdisk创建分区,在Linux下用fdisk创建分区_weixin_39968410的博客-CSDN博客

sudo fdisk /dev/nvme0n1

1. 创建主分区：

---------------------------------------------------------------------------
command (m for help): p ## p :显示硬盘分割情况

Disk /dev/nvme0n1: 3.5 TiB, 3840755982336 bytes, 7501476528 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 131072 bytes / 131072 bytes
Disklabel type: dos
Disk identifier: 0x473a4ff6
---------------------------------------------------------------------------
Command (m for help): n ##设定新的硬盘分割区
Partition type
   p   primary (0 primary, 0 extended, 4 free)
   e   extended (container for logical partitions)
- - - - - - - - - - - - - - - - - -- 
Select (default p): p ## 创建主分区(p)
- - - - - - - - - - - - - - - - - -- 
Partition number (1-4, default 1): 1  #分区号为1
- - - - - - - - - - - - - - - - - -- 
First sector (2048-4294967295, default 2048): ##直接回车默认从第一个柱面开始划分
- - - - - - - - - - - - - - - - - --
Last sector, +sectors or +size{K,M,G,T,P} (2048-4294967294, default 4294967294): +3.5T. #分区大小设置，超过该磁盘剩余的空间，无效,默认是最大空间
Value out of range.
Last sector, +sectors or +size{K,M,G,T,P} (2048-4294967294, default 4294967294): +1T #分区大小设置为1TB
- - - - - - - - - - - - - - - - - --
Created a new partition 1 of type 'Linux' and of size 1 TiB.
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2. 创建扩展分区

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Command (m for help): n
Partition type
   p   primary (1 primary, 0 extended, 3 free)
   e   extended (container for logical partitions)
Select (default p): e #建立扩展分区
Partition number (2-4, default 2): 2 #分区号为1
First sector (2147485696-4294967295, default 2147485696): 
Last sector, +sectors or +size{K,M,G,T,P} (2147485696-4294967294, default 4294967294): +1T
Value out of range.
Last sector, +sectors or +size{K,M,G,T,P} (2147485696-4294967294, default 4294967294): +800G # 分区容量为800G  

Created a new partition 2 of type 'Extended' and of size 800 GiB.
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Command (m for help): p #查看分区状态
Disk /dev/nvme0n1: 3.5 TiB, 3840755982336 bytes, 7501476528 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 131072 bytes / 131072 bytes
Disklabel type: dos
Disk identifier: 0x473a4ff6
- - - - - - - - - - - - 
# 以下是刚刚创建的分区：
Device         Boot      Start        End    Sectors  Size Id Type
/dev/nvme0n1p1            2048 2147485695 2147483648    1T 83 Linux
/dev/nvme0n1p2      2147485696 3825207295 1677721600  800G  5 Extended

3. 在扩展分区创建逻辑分区

Command (m for help): n
Partition type
   p   primary (1 primary, 1 extended, 2 free)
   l   logical (numbered from 5)
Select (default p): l # 选择创建逻辑分区

Adding logical partition 5
First sector (2147487744-3825207295, default 2147487744): 
Last sector, +sectors or +size{K,M,G,T,P} (2147487744-3825207295, default 3825207295): # 直接回车表示所有扩展分区只划分一个逻辑分区

Created a new partition 5 of type 'Linux' and of size 800 GiB.

4. 保存设置


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

5. 查看磁盘状况：

三、格式化磁盘

刚创建的分区必须要进行格式化，否则会出现如下错误：
mount: /data: wrong fs type, bad option, bad superblock on /dev/nvme0n1p1, missing codepage or helper program, or other error.