centos7 挂载新磁盘

查看磁盘

[root@localhost ~]# fdisk -l

Disk /dev/vda: 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 label type: dos
Disk identifier: 0x000c81ed

   Device Boot      Start         End      Blocks   Id  System
/dev/vda1   *        2048   104857566    52427759+  83  Linux

Disk /dev/vdb: 2199.0 GB, 2199023255552 bytes, 4294967296 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

磁盘/dev/vdb尚有2199GB未分配

查看分区

[root@localhost ~]# df -Th
Filesystem     Type      Size  Used Avail Use% Mounted on
devtmpfs       devtmpfs  7.8G     0  7.8G   0% /dev
tmpfs          tmpfs     7.8G     0  7.8G   0% /dev/shm
tmpfs          tmpfs     7.8G  488K  7.8G   1% /run
tmpfs          tmpfs     7.8G     0  7.8G   0% /sys/fs/cgroup
/dev/vda1      ext4       50G  2.0G   45G   5% /
tmpfs          tmpfs     1.6G     0  1.6G   0% /run/user/0

磁盘/dev/vdb实际并没有挂载

磁盘分区

注意：

# 执行"fdisk /dev/vdb"后，出现"Command (m for help)"提示时，依次输入下面指令
n -> p -> 1 -> 回车 -> 回车 -> w

详情：

[root@localhost ~]# fdisk /dev/vdb
Welcome to fdisk (util-linux 2.23.2).

Changes will remain in memory only, until you decide to write them.
Be careful before using the write command.

Device does not contain a recognized partition table
Building a new DOS disklabel with disk identifier 0x11e106cf.

WARNING: The size of this disk is 2.2 TB (2199023255552 bytes).
DOS partition table format can not be used on drives for volumes
larger than (2199023255040 bytes) for 512-byte sectors. Use parted(1) and GUID 
partition table format (GPT).


Command (m for help): n
Partition type:
   p   primary (0 primary, 0 extended, 4 free)
   e   extended
Select (default p): p
Partition number (1-4, default 1): 1
First sector (2048-4294967295, default 2048): 
Using default value 2048
Last sector, +sectors or +size{K,M,G} (2048-4294967294, default 4294967294): 
Using default value 4294967294
Partition 1 of type Linux and of size 2 TiB is set

Command (m for help): w
The partition table has been altered!

Calling ioctl() to re-read partition table.
Syncing disks.

说明：

n：添加新分区

p：设为主分区

1: 分区序号

两个回车指是开始和结束的磁盘大小；

w：写入磁盘

格式分区

[root@localhost ~]# mkfs.ext4 /dev/vdb1
mke2fs 1.42.9 (28-Dec-2013)
Filesystem label=
OS type: Linux
Block size=4096 (log=2)
Fragment size=4096 (log=2)
Stride=0 blocks, Stripe width=0 blocks
134217728 inodes, 536870655 blocks
26843532 blocks (5.00%) reserved for the super user
First data block=0
Maximum filesystem blocks=2684354560
16384 block groups
32768 blocks per group, 32768 fragments per group
8192 inodes per group
Superblock backups stored on blocks: 
    32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208, 
    4096000, 7962624, 11239424, 20480000, 23887872, 71663616, 78675968, 
    102400000, 214990848, 512000000

Allocating group tables: done                            
Writing inode tables: done                            
Creating journal (32768 blocks): done
Writing superblocks and filesystem accounting information: done       

挂载磁盘

mkdir /mnt
mount /dev/vdb1 /mnt

确认磁盘

[root@localhost ~]# fdisk -l 

Disk /dev/vda: 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 label type: dos
Disk identifier: 0x000c81ed

   Device Boot      Start         End      Blocks   Id  System
/dev/vda1   *        2048   104857566    52427759+  83  Linux

Disk /dev/vdb: 2199.0 GB, 2199023255552 bytes, 4294967296 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: 0x11e106cf

   Device Boot      Start         End      Blocks   Id  System
/dev/vdb1            2048  4294967294  2147482623+  83  Linux

确认分区

[root@localhost ~]# df -Th
Filesystem     Type      Size  Used Avail Use% Mounted on
devtmpfs       devtmpfs  7.8G     0  7.8G   0% /dev
tmpfs          tmpfs     7.8G     0  7.8G   0% /dev/shm
tmpfs          tmpfs     7.8G  492K  7.8G   1% /run
tmpfs          tmpfs     7.8G     0  7.8G   0% /sys/fs/cgroup
/dev/vda1      ext4       50G  2.0G   45G   5% /
tmpfs          tmpfs     1.6G     0  1.6G   0% /run/user/0
/dev/vdb1      ext4      2.0T   81M  1.9T   1% /mnt

开机启动

echo "/dev/vdb1 /mnt ext4 defaults 0 0" >> /etc/fstab