刚装了一台服务器，有3组Raid硬盘，还有1块PCI-e接口的硬盘，把CentOS7装到到了Virtual Disk0上，进系统默认找不到另外2组硬盘和PCI-e的硬盘。
硬盘配置：
Virtual Disk0: RAID1 600GB
Virtual Disk1: RAID5 1.8TB
Virtual Disk1: PCI-e 1.5TB
Virtual Disk3: RAID5 4TB

1.先查看服务器的硬件信息：
fdisk -l查看的信息是很详细的，这里只把需要硬盘信息列出来

[root@CentOS7 ~]# fdisk -l

Disk /dev/sda: 599.6 GB, 599550590976 bytes, 1170997248 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk label type: dos
Disk identifier: 0x000d1efb

   Device Boot      Start         End      Blocks   Id  System
/dev/sda1   *        2048     2099199     1048576   83  Linux
/dev/sda2         2099200  1170997247   584449024   8e  Linux LVM

Disk /dev/sdb: 1918.2 GB, 1918239768576 bytes, 3746562048 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disk label type: dos
Disk identifier: 0x5bbc95ee

   Device Boot      Start         End      Blocks   Id  System
/dev/sdb1            2048  3746562047  1873280000   83  Linux
WARNING: fdisk GPT support is currently new, and therefore in an experimental phase. Use at your own discretion.

Disk /dev/sdc: 4316.0 GB, 4316039479296 bytes, 8429764608 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disk label type: gpt
Disk identifier: 8518D2F4-5842-441B-9F5D-35C13F47F68E


#         Start          End    Size  Type            Name
 1           34   8429764574    3.9T  Microsoft basic data
Partition 1 does not start on physical sector boundary.

Disk /dev/nvme0n1: 1600.3 GB, 1600321314816 bytes, 3125627568 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk label type: dos
Disk identifier: 0x712c6c73

        Device Boot      Start         End      Blocks   Id  System
/dev/nvme0n1p1            2048  3125627567  1562812760   83  Linux

Disk /dev/mapper/centos-root: 53.7 GB, 53687091200 bytes, 104857600 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes


Disk /dev/mapper/centos-swap: 4294 MB, 4294967296 bytes, 8388608 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes


Disk /dev/mapper/centos-home: 540.5 GB, 540490596352 bytes, 1055645696 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes

查看到下列信息，并且均已有分区

Disk /dev/sda: 599.6 GB, 599550590976 bytes, 1170997248 sectors
Disk /dev/sdb: 1918.2 GB, 1918239768576 bytes, 3746562048 sectors
   Device Boot      Start         End      Blocks   Id  System
/dev/sdb1            2048  3746562047  1873280000   83  Linux
Disk /dev/nvme0n1: 1600.3 GB, 1600321314816 bytes, 3125627568 sectors
        Device Boot      Start         End      Blocks   Id  System
/dev/nvme0n1p1            2048  3125627567  1562812760   83  Linux
Disk /dev/sdc: 4316.0 GB, 4316039479296 bytes, 8429764608 sectors
#         Start          End    Size  Type            Name
 1           34   8429764574    3.9T  Microsoft basic data

2. 因为已经有分区，创建对应目录，挂载对应磁盘
在根目录下，建一个文件夹，待会将分区挂载在这个文件夹上，以后要往新硬盘存东西就存在新建文件夹下就可以了。

[root@CentOS7 ~]# mkdir /disk1
[root@CentOS7 ~]# mount /dev/sdb1 /disk1
[root@CentOS7 ~]# mkdir /disk2
[root@CentOS7 ~]# mount /dev/sdc1 /disk2
[root@CentOS7 ~]# mkdir /disk3
[root@CentOS7 ~]# mount /dev/nvme0n1p1 /disk3

3.查看磁盘空间信息

[root@CentOS7 ~]# df -h
Filesystem               Size  Used Avail Use% Mounted on
/dev/mapper/centos-root   50G  8.9G   42G  18% /
/dev/nvme0n1p1           1.5T  1.4T  115G  93% /disk3
/dev/sdb1                1.8T   19G  1.7T   2% /disk1
/dev/sdc1                3.9T  950G  2.8T  26% /disk2
/dev/sda1               1014M  150M  865M  15% /boot
/dev/mapper/centos-home  504G  201G  304G  40% /home
[root@CentOS7 ~]# 

4.设置开机自动挂载目录
编辑配置文件如下：

[root@CentOS7 ~]# vi /etc/fstab

#
# /etc/fstab
# Created by anaconda on Mon Aug 24 10:16:27 2020
#
# Accessible filesystems, by reference, are maintained under '/dev/disk'
# See man pages fstab(5), findfs(8), mount(8) and/or blkid(8) for more info
#
/dev/mapper/centos-root /                       xfs     defaults        0 0
UUID=ecea48d2-fa35-4a6b-a63d-4fe8b5068796 /boot                   xfs     defaults        0 0
/dev/mapper/centos-home /home                   xfs     defaults        0 0
/dev/mapper/centos-swap swap                    swap    defaults        0 0

/dev/nvme0n1p1  /disk3                            xfs     defaults        0 0
/dev/sdb1       /disk1                            ext3    defaults        0 0
/dev/sdc1       /disk2                         ext4    defaults        0 0

注意：填写磁盘分区格式要准确，否则可能造成系统无法正常启动，进入单用户模式，查看磁盘分区格式如下：

[root@CentOS7 ~]# df -T
Filesystem              Type      1K-blocks       Used  Available Use% Mounted on
/dev/mapper/centos-root xfs        52403200    9241412   43161788  18% /
/dev/nvme0n1p1          xfs      1562049668 1442204608  119845060  93% /disk3
/dev/sdb1               ext3     1843755988   19613580 1730478408   2% /disk1
/dev/sdc1               ext4     4148592052  995351652 2942479904  26% /disk2
/dev/sda1               xfs         1038336     153352     884984  15% /boot
/dev/mapper/centos-home xfs       527565124  209750092  317815032  40% /home
[root@CentOS7 ~]#