查看挂载
[root@zabbix ~]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/vg_zabbix-lv_root 627G 34G 562G 6% /
tmpfs 4.9G 76K 4.9G 1% /dev/shm
/dev/sda1 485M 39M 421M 9% /boot
查看分区
[root@zabbix ~]# fdisk -l
Disk /dev/sda: 751.6 GB,751619276800 bytes
255 heads,63 sectors/track,91379 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x000bee4c
Device Boot Start End Blocks Id System
/dev/sda1 * 1 64 512000 83 Linux
Partition 1 does not end on cylinder boundary.
/dev/sda2 64 5222 41430016 8e Linux LVM
/dev/sda3 5223 91379 692056102+ 83 Linux
Disk /dev/mapper/vg_zabbix-lv_root: 683.1 GB,683134681088 bytes
255 heads,83053 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000
Disk /dev/mapper/vg_zabbix-lv_swap: 4160 MB,4160749568 bytes
255 heads,505 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000
执行 fdisk /dev/xvdb ，进入 fdisk 命令行给磁盘分区
[root@zabbix ~]# fdisk /dev/sda3
Device contains neither a valid DOS partition table,nor Sun,SGI or OSF disklabel
Building a new DOS disklabel with disk identifier 0x33e33bd5.
Changes will remain in memory only,until you decide to write them.
After that,of course,the prevIoUs content won't be recoverable.
Warning: invalid flag 0x0000 of partition table 4 will be corrected by w(rite)
WARNING: DOS-compatible mode is deprecated. It's strongly recommended to
switch off the mode (command 'c') and change display units to
sectors (command 'u').
Command (m for help): p
Disk /dev/sda3: 708.7 GB,708665448960 bytes
255 heads,86157 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x33e33bd5
Device Boot Start End Blocks Id System
Command (m for help): n
Command action
e extended
p primary partition (1-4)
p
Partition number (1-4): 1
First cylinder (1-86157,default 1):
Using default value 1
Last cylinder,+cylinders or +size{K,M,G} (1-86157,default 86157):
Using default value 86157
Command (m for help): t
Selected partition 1
Hex code (type L to list codes): 8e
Changed system type of partition 1 to 8e (Linux LVM)
Command (m for help): w
The partition table has been altered!
Calling ioctl() to re-read partition table.
WARNING: Re-reading the partition table Failed with error 22: Invalid argument.
The kernel still uses the old table. The new table will be used at
the next reboot or after you run partprobe(8) or kpartx(8)
Syncing disks.
我们依次输入以下命令：
p 查看已有分区，由于这个分区是新的，所以为空
n 新建分区：
p 新建主分区
1 输入分区号，因为之前没有分区，所以这是第一个分区，分区号为1
接下来 First cylinder 和 Last cylinder 我们直接点击回车，默认使用全部空间
t 改变分区类型
8e 改变分区类型为 LVM
w 写入改变
此时系统将改变分区，然后退出 fdisk 命令行。如果没有自动退出，输入 q 退出。
用 mkfs 命令对分区进行格式化
mkfs -t ext4 /dev/sda3
添加 LVM到原来的 LVM组
[root@zabbix ~]# lvm
lvm> pvcreate /dev/sda3
Physical volume "/dev/sda3" successfully created
lvm> vgextend vg_zabbix /dev/sda3
Volume group "vg_zabbix" successfully extended
lvm> lvextend -L +600G /dev/mapper/vg_zabbix-lv_root
Extending logical volume lv_root to 36.22 GiB
Logical volume lv_root successfully resized
lvm> quit
Exiting.
[root@zabbix ~]# resize2fs /dev/mapper/vg_zabbix-lv_root
resize2fs 1.41.12 (17-May-2010)
Filesystem at /dev/mapper/vg_zabbix-lv_root is mounted on /; on-line resizing required
old desc_blocks = 3,new_desc_blocks = 3
Performing an on-line resize of /dev/mapper/vg_zabbix-lv_root to 9494528 (4k) blocks.
The filesystem on /dev/mapper/vg_zabbix-lv_root is now 9494528 blocks long.
[root@zabbix ~]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/vg_zabbix-lv_root 627G 34G 562G 6% /
tmpfs 4.9G 80K 4.9G 1% /dev/shm
/dev/sda1 485M 39M 421M 9% /boot
[root@zabbix ~]# reboot
原文链接：https://www.f2er.com/centos/375619.html