LVM（逻辑卷管理）是一种灵活和高级的选项，可用于管理大多数主要Linux发行版的硬盘。 使用LVM管理磁盘比传统的工具（如fdisk ， parted或gparted）容易。
目录
1.查看当前硬盘及分区情况
2.初始化/dev/sdb为PV(physical volume)
3.PV加入至VG组。
4.创建lv
5.格式化逻辑分区
6.挂载硬盘/data
7.迁移zabbix的mysql数据库（附加操作）
1.查看当前硬盘及分区情况 [root@localhost ~]# fdisk -l Disk /dev/sdb: 107.4 GB, 107374182400 bytes 255 heads, 63 sectors/track, 13054 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其中/dev/sdb是我需要增加的硬盘
2.初始化/dev/sdb为PV(physical volume)命令如下:
[root@localhost ~]# pvcreate /dev/sdb Physical volume "/dev/sdb" successfully created [root@localhost ~]# pvdisplay "/dev/sdb" is a new physical volume of "100.00 GiB" --- NEW Physical volume --- PV Name /dev/sdb VG Name PV Size 100.00 GiB Allocatable NO PE Size 0 Total PE 0 Free PE 0 Allocated PE 0 PV UUID 5d602Y-xPFg-RWj8-OUcS-H6M4-Rkn4-UXWofX 3.PV加入至VG组。 [root@localhost ~]# vgcreate VGroup00 /dev/sdb Volume group "VGroup00" successfully created [root@localhost ~]# vgdisplay --- Volume group --- VG Name VGroup00 System ID Format lvm2 Metadata Areas 1 Metadata Sequence No 1 VG Access read/write VG Status resizable MAX LV 0 Cur LV 0 Open LV 0 Max PV 0 Cur PV 1 Act PV 1 VG Size 100.00 GiB PE Size 4.00 MiB Total PE 25599 Alloc PE / Size 0 / 0 Free PE / Size 25599 / 100.00 GiB VG UUID dxt5j1-EM7w-C24F-y0Fm-ZbW4-6LfY-IbIfY2 4.创建lv [root@localhost ~]# lvcreate -l +100%free -n LVol00 VGroup00 Logical volume "LVol00" created. [root@localhost ~]# lvdisplay --- Logical volume --- LV Path /dev/VGroup00/LVol00 LV Name LVol00 VG Name VGroup00 LV UUID DVpdmE-JOJi-WvtU-gHVy-okP3-cw2s-Vfl1eh LV Write Access read/write LV Creation host, time localhost.localdomain.localdomain, 2019-10-28 09:39:34 +0800 LV Status available # open 0 LV Size 100.00 GiB Current LE 25599 Segments 1 Allocation inherit Read ahead sectors auto - currently set to 256 Block device 253:0以上命令，把所有的空闲空间划至/dev/VGroup00/LVol00空间中。
5.格式化逻辑分区 [root@localhost ~]# mkfs.ext4 /dev/VGroup00/LVol00 mke2fs 1.41.12 (17-May-2010) 文件系统标签= 操作系统:Linux 块大小=4096 (log=2) 分块大小=4096 (log=2) Stride=0 blocks, Stripe width=0 blocks 6553600 inodes, 26213376 blocks 1310668 blocks (5.00%) reserved for the super user 第一个数据块=0 Maximum filesystem blocks=4294967296 800 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 正在写入inode表: 完成 Creating journal (32768 blocks): 完成 Writing superblocks and filesystem accounting information: 完成 This filesystem will be automatically checked every 26 mounts or 180 days, whichever comes first. Use tune2fs -c or -i to override. 6.挂载硬盘/data [root@localhost ~]# mkdir -p /data [root@localhost ~]# mount /dev/VGroup00/LVol00 /data [root@localhost ~]# df -h Filesystem Size Used Avail Use% Mounted on /dev/sda3 29G 26G 2.4G 92% / tmpfs 3.9G 4.0K 3.9G 1% /dev/shm /dev/sda1 477M 105M 347M 24% /boot /dev/mapper/VGroup00-LVol00 99G 60M 94G 1% /data 7.迁移zabbix的mysql数据库（附加操作）原来mysql的数据目录在/var/lib/mysql。把它
迁移至/data/mysql目录中。