需求：当前系统中的/home目录存储空间为50G，由于需要在home目录中存储东西，需要将home目录扩展到不小于1T

新加1T硬盘，并对硬盘创建分区

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[root@localhost mapper]# fdisk /dev/sdb
Welcome to fdisk (util-linux 2.32.1).
Changes will remain in memory only, until you decide to write them.
Be careful before using the write command.

The size of this disk is 2 TiB (2199023255552 bytes). DOS partition table format cannot be used on drives for volumes larger than 2199023255040 bytes for 512-byte sectors. Use GUID partition table format (GPT).

Command (m for help): n
Partition type
   p   primary (2 primary, 0 extended, 2 free)
   e   extended (container for logical partitions)
Select (default p): p
Partition number (1,2, default 1): 1
...........: 默认
.................: +1T	# 容量
Command (m for help): t		# 更换磁盘类型
Partition number (1,2, default 2): 1
............: 8e	# LVM类型
Command (m for help): w		# w保存退出

将新建的分区格式化

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[root@localhost mapper]# ls /dev/sd*
/dev/sda  /dev/sda1  /dev/sda2  /dev/sdb  /dev/sdb1
[root@localhost mapper]# mkfs.xfs /dev/sdb1

进去lvm管理

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[root@localhost mapper]# lvm
lvm> pvcreate /dev/sdb1		// 创建逻辑卷
lvm>vgextend cl /dev/sdb1  // 将初始化过的分区加入到虚拟卷组cl
lvm>vgdisplay -v
lvm>lvextend -L +1024G /dev/mapper/cl-home	// 对home增加1024G
lvm>pvdisplay   // 查看卷容量
lvm>quit   // 退出

[root@localhost mapper]# xfs_growfs /dev/mapper/cl-home  
meta-data=/dev/mapper/cl-home    isize=512    agcount=4, agsize=3276800 blks
         =                       sectsz=512   attr=2, projid32bit=1
         =                       crc=1        finobt=1, sparse=1, rmapbt=0
         =                       reflink=1
data     =                       bsize=4096   blocks=13107200, imaxpct=25
         =                       sunit=0      swidth=0 blks
naming   =version 2              bsize=4096   ascii-ci=0, ftype=1
log      =internal log           bsize=4096   blocks=6400, version=2
         =                       sectsz=512   sunit=0 blks, lazy-count=1
realtime =none                   extsz=4096   blocks=0, rtextents=0
data blocks changed from 13107200 to 281542656

验证

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[root@localhost mapper]# df -hT
Filesystem          Type      Size  Used Avail Use% Mounted on
devtmpfs            devtmpfs   16G     0   16G   0% /dev
tmpfs               tmpfs      16G     0   16G   0% /dev/shm
tmpfs               tmpfs      16G  9.6M   16G   1% /run
tmpfs               tmpfs      16G     0   16G   0% /sys/fs/cgroup
/dev/mapper/cl-root xfs        20G  4.1G   16G  21% /
/dev/sda1           ext4      9.8G  226M  9.1G   3% /boot
tmpfs               tmpfs     3.2G  1.2M  3.2G   1% /run/user/42
tmpfs               tmpfs     3.2G  4.6M  3.2G   1% /run/user/0
/dev/mapper/cl-home xfs       1.1T  7.6G  1.1T   1% /home

# /home成功扩容到1T