文章目录
0 背景
迁移var目录的数据回sda盘中。
迁移前：
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINTS
sda 8:0 0 931.5G 0 disk
|-sda1 8:1 0 487M 0 part /boot
|-sda2 8:2 0 1K 0 part
`-sda5 8:5 0 931G 0 part
|-HsServer--vg-root 254:2 0 23.3G 0 lvm /
|-HsServer--vg-var 254:3 0 9.3G 0 lvm
|-HsServer--vg-swap_1 254:4 0 976M 0 lvm [SWAP]
`-HsServer--vg-tmp 254:5 0 1.9G 0 lvm /tmp
sdb 8:16 0 111.8G 0 disk
|-sdb1 8:17 0 100M 0 part
|-sdb2 8:18 0 67.9G 0 part
|-sdb3 8:19 0 1K 0 part
`-sdb5 8:21 0 43.8G 0 part
sdc 8:32 0 1.8T 0 disk
|-sdc1 8:33 0 500G 0 part
| `-Vol1-lvtest 254:1 0 500G 0 lvm /var
`-sdc2 8:34 0 1T 0 part
`-Vol2-lvtest 254:0 0 1024G 0 lvm /home
迁移后的结果：
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINTS
sda 8:0 0 931.5G 0 disk
|-sda1 8:1 0 487M 0 part /boot
|-sda2 8:2 0 1K 0 part
`-sda5 8:5 0 931G 0 part
|-HsServer--vg-root 254:0 0 23.3G 0 lvm /
|-HsServer--vg-swap_1 254:1 0 976M 0 lvm [SWAP]
|-HsServer--vg-tmp 254:2 0 1.9G 0 lvm /tmp
`-HsServer--vg-var 254:3 0 300G 0 lvm /var
sdb 8:16 0 111.8G 0 disk
|-sdb1 8:17 0 100M 0 part
|-sdb2 8:18 0 67.9G 0 part
|-sdb3 8:19 0 1K 0 part
`-sdb5 8:21 0 43.8G 0 part
sdc 8:32 0 1.8T 0 disk
|-sdc1 8:33 0 500G 0 part
| `-Vol2-lvtest 254:4 0 1T 0 lvm /home
`-sdc2 8:34 0 1T 0 part
`-Vol2-lvtest 254:4 0 1T 0 lvm /home
1 查看当前情况
在sda5中，创建新分区，然后把sdc1分区的var文件放到sda5的分区中。
1.1 查看磁盘空间
root@HsServer:~# df -h
Filesystem Size Used Avail Use% Mounted on
udev 11G 0 11G 0% /dev
tmpfs 2.2G 3.2M 2.2G 1% /run
/dev/mapper/HsServer--vg-root 23G 11G 11G 50% /
tmpfs 11G 0 11G 0% /dev/shm
tmpfs 5.0M 16K 5.0M 1% /run/lock
/dev/mapper/Vol1-lvtest 492G 9.6G 457G 3% /var
/dev/mapper/Vol2-lvtest 1007G 56G 901G 6% /home
/dev/mapper/HsServer--vg-tmp 1.8G 80K 1.7G 1% /tmp
/dev/sda1 455M 216M 215M 51% /boot
tmpfs 2.2G 56K 2.2G 1% /run/user/113
tmpfs 2.2G 44K 2.2G 1% /run/user/0
1.2 列出所有可用块设备的信息，而且还能显示他们之间的依赖关系
root@HsServer:~# lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINTS
sda 8:0 0 931.5G 0 disk
|-sda1 8:1 0 487M 0 part /boot
|-sda2 8:2 0 1K 0 part
`-sda5 8:5 0 931G 0 part
|-HsServer--vg-root 254:2 0 23.3G 0 lvm /
|-HsServer--vg-var 254:3 0 9.3G 0 lvm
|-HsServer--vg-swap_1 254:4 0 976M 0 lvm [SWAP]
`-HsServer--vg-tmp 254:5 0 1.9G 0 lvm /tmp
sdb 8:16 0 111.8G 0 disk
|-sdb1 8:17 0 100M 0 part
|-sdb2 8:18 0 67.9G 0 part
|-sdb3 8:19 0 1K 0 part
`-sdb5 8:21 0 43.8G 0 part
sdc 8:32 0 1.8T 0 disk
|-sdc1 8:33 0 500G 0 part
| `-Vol1-lvtest 254:1 0 500G 0 lvm /var
`-sdc2 8:34 0 1T 0 part
`-Vol2-lvtest 254:0 0 1024G 0 lvm /home
1.3 查看可用磁盘
root@HsServer:~# fdisk -l
Disk /dev/sdb: 111.79 GiB, 120034123776 bytes, 234441648 sectors
Disk model: INTEL SSDSC2BW12
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: dos
Disk identifier: 0x36e496ea
Device Boot Start End Sectors Size Id Type
/dev/sdb1 * 2048 206847 204800 100M 7 HPFS/NTFS/exFAT
/dev/sdb2 206848 142580655 142373808 67.9G 7 HPFS/NTFS/exFAT
/dev/sdb3 142580656 234441647 91860992 43.8G f W95 Ext'd (LBA)
/dev/sdb5 142580719 234441647 91860929 43.8G 7 HPFS/NTFS/exFAT
Disk /dev/sda: 931.51 GiB, 1000204886016 bytes, 1953525168 sectors
Disk model: ST31000528AS
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: dos
Disk identifier: 0xb8213fff
Device Boot Start End Sectors Size Id Type
/dev/sda1 * 2048 999423 997376 487M 83 Linux
/dev/sda2 1001470 1953523711 1952522242 931G 5 Extended
/dev/sda5 1001472 1953523711 1952522240 931G 8e Linux LVM
Disk /dev/sdc: 1.82 TiB, 2000398934016 bytes, 3907029168 sectors
Disk model: ST2000DM001-1ER1
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disklabel type: dos
Disk identifier: 0x97be5b6a
Device Boot Start End Sectors Size Id Type
/dev/sdc1 2048 1048578047 1048576000 500G 1 FAT12
/dev/sdc2 1048578048 3196061695 2147483648 1T 8e Linux LVM
Disk /dev/mapper/Vol2-lvtest: 1024 GiB, 1099507433472 bytes, 2147475456 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 /dev/mapper/Vol1-lvtest: 500 GiB, 536866717696 bytes, 1048567808 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 /dev/mapper/HsServer--vg-root: 23.28 GiB, 24998051840 bytes, 48824320 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/HsServer--vg-var: 9.31 GiB, 9999220736 bytes, 19529728 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/HsServer--vg-swap_1: 976 MiB, 1023410176 bytes, 1998848 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/HsServer--vg-tmp: 1.86 GiB, 1996488704 bytes, 3899392 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
root@HsServer:~# vgdisplay mapper
Volume group "mapper" not found
Cannot process volume group mapper
root@HsServer:~# vgdisplay /dev/mapper
Volume group "mapper" not found
Cannot process volume group mapper
1.4 查看卷组
root@HsServer:~# vgdisplay
--- Volume group ---
VG Name Vol2
System ID
Format lvm2
Metadata Areas 1
Metadata Sequence No 2
VG Access read/write
VG Status resizable
MAX LV 0
Cur LV 1
Open LV 1
Max PV 0
Cur PV 1
Act PV 1
VG Size <1024.00 GiB
PE Size 4.00 MiB
Total PE 262143
Alloc PE / Size 262143 / <1024.00 GiB
Free PE / Size 0 / 0
VG UUID lFyMbP-ZLeb-Ux0U-b4Ss-wUva-8cfP-7dTZXE
--- Volume group ---
VG Name Vol1
System ID
Format lvm2
Metadata Areas 1
Metadata Sequence No 2
VG Access read/write
VG Status resizable
MAX LV 0
Cur LV 1
Open LV 1
Max PV 0
Cur PV 1
Act PV 1
VG Size <500.00 GiB
PE Size 4.00 MiB
Total PE 127999
Alloc PE / Size 127999 / <500.00 GiB
Free PE / Size 0 / 0
VG UUID 0gCdSf-eX51-ZlfK-TYoq-BVLe-Rg86-CLj7uT
--- Volume group ---
VG Name HsServer-vg
System ID
Format lvm2
Metadata Areas 1
Metadata Sequence No 7
VG Access read/write
VG Status resizable
MAX LV 0
Cur LV 4
Open LV 3
Max PV 0
Cur PV 1
Act PV 1
VG Size 931.03 GiB
PE Size 4.00 MiB
Total PE 238344
Alloc PE / Size 9064 / <35.41 GiB
Free PE / Size 229280 / 895.62 GiB
VG UUID SrHizr-6keh-Hwce-6Bmg-eklk-GlbG-BvTaQ2
root@HsServer:~# vgdisplay HsServer-vg
--- Volume group ---
VG Name HsServer-vg
System ID
Format lvm2
Metadata Areas 1
Metadata Sequence No 7
VG Access read/write
VG Status resizable
MAX LV 0
Cur LV 4
Open LV 3
Max PV 0
Cur PV 1
Act PV 1
VG Size 931.03 GiB
PE Size 4.00 MiB
Total PE 238344
Alloc PE / Size 9064 / <35.41 GiB
Free PE / Size 229280 / 895.62 GiB
VG UUID SrHizr-6keh-Hwce-6Bmg-eklk-GlbG-BvTaQ2
2 卷组中创建逻辑卷
root@HsServer:~# lvcreate -L 300G -n var HsServer-vg
WARNING: ext4 signature detected on /dev/HsServer-vg/var at offset 1080. Wipe it? [y/n]: y
Wiping ext4 signature on /dev/HsServer-vg/var.
Logical volume "var" created.
- 1，-l选项定义了要为逻辑卷指定多少可用的卷组空间。注意，你可以按照卷组空闲空间的百分比来指定这个值。本例中为新逻辑卷使用了所有的空闲空间（或者用-L选项以字节、千字节（KB）、兆字节（MB）或吉字节（GB）为单位来指定实际的大小）。
- 2，-n选项允许你为逻辑卷指定一个名称（在本例中称作var）
查看磁盘分区情况：
root@HsServer:~# fdisk -l
Disk /dev/mapper/HsServer--vg-var: 300 GiB, 322122547200 bytes, 629145600 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
3 创建文件系统
root@HsServer:~# sudo mkfs.ext4 /dev/mapper/HsServer--vg-var
mke2fs 1.47.0 (5-Feb-2023)
Creating filesystem with 78643200 4k blocks and 19660800 inodes
Filesystem UUID: dc8871ab-f3b6-476d-b5d4-9f4e6f5b5b5d
Superblock backups stored on blocks:
32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208,
4096000, 7962624, 11239424, 20480000, 23887872, 71663616
Allocating group tables: done
Writing inode tables: done
Creating journal (262144 blocks):
done
Writing superblocks and filesystem accounting information: done
如果没有创建文件系统，则会爆出如下的错误：
mount: /backVar: wrong fs type, bad option, bad superblock on /dev/mapper/HsServer--vg-var, missing codepage or helper program, or other error.
dmesg(1) may have more information after failed mount system call.
4 创建临时文件夹并挂载，然后备份源文件
root@HsServer:~# mkdir /backVar/
root@HsServer:~# mount /dev/mapper/HsServer--vg-var /backVar
root@HsServer:~# cp -r /var/* /backVar/
5 修改开机挂载配置
5.1 查看原配置文件
root@HsServer:~# cat /etc/fstab
# /etc/fstab: static file system information.
#
# Use 'blkid' to print the universally unique identifier for a
# device; this may be used with UUID= as a more robust way to name devices
# that works even if disks are added and removed. See fstab(5).
#
# systemd generates mount units based on this file, see systemd.mount(5).
# Please run 'systemctl daemon-reload' after making changes here.
#
# <file system> <mount point> <type> <options> <dump> <pass>
/dev/mapper/HsServer--vg-root / ext4 errors=remount-ro 0 1
# /boot was on /dev/sda1 during installation
UUID=de772acf-c0c7-4dbc-b213-2ce826d6e055 /boot ext2 defaults 0 2
#/dev/mapper/HsServer--vg-home /home ext4 defaults 0 2
/dev/mapper/HsServer--vg-tmp /tmp ext4 defaults 0 2
#/dev/mapper/HsServer--vg-var /var ext4 defaults 0 2
/dev/mapper/HsServer--vg-swap_1 none swap sw 0 0
/dev/Vol1/lvtest /var ext4 defaults 0 2
/dev/Vol2/lvtest /home ext4 defaults 0 2
5.2 修改配置文件
root@HsServer:~# vi /etc/fstab
添加新挂载内容：/dev/mapper/HsServer--vg-var /var
注释掉原挂载内容：/dev/Vol1/lvtest /var ext4 defaults 0 2
然后重启计算机，reboot
查看结果(可以看到，已经成功更换挂载的盘)：
root@HsServer:~# df -h
Filesystem Size Used Avail Use% Mounted on
udev 11G 0 11G 0% /dev
tmpfs 2.2G 2.9M 2.2G 1% /run
/dev/mapper/HsServer--vg-root 23G 11G 11G 50% /
tmpfs 11G 0 11G 0% /dev/shm
tmpfs 5.0M 16K 5.0M 1% /run/lock
/dev/mapper/Vol2-lvtest 1007G 56G 901G 6% /home
/dev/sda1 455M 216M 215M 51% /boot
/dev/mapper/HsServer--vg-tmp 1.8G 80K 1.7G 1% /tmp
/dev/mapper/HsServer--vg-var 295G 9.5G 270G 4% /var
tmpfs 2.2G 56K 2.2G 1% /run/user/113
tmpfs 2.2G 44K 2.2G 1% /run/user/0
root@HsServer:~# lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINTS
sda 8:0 0 931.5G 0 disk
|-sda1 8:1 0 487M 0 part /boot
|-sda2 8:2 0 1K 0 part
`-sda5 8:5 0 931G 0 part
|-HsServer--vg-root 254:0 0 23.3G 0 lvm /
|-HsServer--vg-swap_1 254:1 0 976M 0 lvm [SWAP]
|-HsServer--vg-tmp 254:2 0 1.9G 0 lvm /tmp
`-HsServer--vg-var 254:3 0 300G 0 lvm /var
sdb 8:16 0 111.8G 0 disk
|-sdb1 8:17 0 100M 0 part
|-sdb2 8:18 0 67.9G 0 part
|-sdb3 8:19 0 1K 0 part
`-sdb5 8:21 0 43.8G 0 part
sdc 8:32 0 1.8T 0 disk
|-sdc1 8:33 0 500G 0 part
| `-Vol1-lvtest 254:5 0 500G 0 lvm
`-sdc2 8:34 0 1T 0 part
`-Vol2-lvtest 254:4 0 1024G 0 lvm /home
6 删除原始分区
删除LVM之前创建的物理卷，卷组，逻辑卷时，删除顺序应该与创建时的顺序相反。也就是卸载文件系统，删除逻辑卷，删除卷组，删除物理卷。卸载文件系统时需要注意：如果之前没有更新/etc/fstab文件,则需要更新。
1,卸载文件系统
umount /dev/mapper/Vol1-lvtest
2,删除逻辑卷
lvremove /dev/mapper/Vol1-lvtest
3,删除卷组
vgremove Vol1
4,删除物理卷
pvremove /dev/sda{1,2,3,5}
6.1 卸载文件系统
查看磁盘的信息：
root@HsServer:~# blkid
/dev/mapper/HsServer--vg-swap_1: UUID="ebdc78fa-f920-47b4-b3ce-4486e0993691" TYPE="swap"
/dev/sdb2: BLOCK_SIZE="512" UUID="D470CFB970CFA09A" TYPE="ntfs" PARTUUID="36e496ea-02"
/dev/sdb5: BLOCK_SIZE="512" UUID="0004A422000CA487" TYPE="ntfs" PARTUUID="36e496ea-05"
/dev/sdb1: LABEL="M-gM-3M-;M-gM-;M-^_M-dM-?M-^]M-gM-^UM-^Y" BLOCK_SIZE="512" UUID="9400C91000C8FA6E" TYPE="ntfs" PARTUUID="36e496ea-01"
/dev/mapper/Vol2-lvtest: UUID="0667b0ac-112e-49b9-b951-b433e559233e" BLOCK_SIZE="4096" TYPE="ext4"
/dev/mapper/HsServer--vg-tmp: UUID="307b0159-746b-4476-866c-ebc2b81632f8" BLOCK_SIZE="4096" TYPE="ext4"
/dev/mapper/HsServer--vg-root: UUID="7117eb71-a277-44b7-a7f8-37418817968d" BLOCK_SIZE="4096" TYPE="ext4"
/dev/sdc2: UUID="IUHj8a-1VcD-ggMn-UzhK-NNBN-ohhT-Zzci3g" TYPE="LVM2_member" PARTUUID="97be5b6a-02"
/dev/sdc1: UUID="roJf0h-R7Bt-tVnm-ml2V-h9ac-fyLZ-jMEa7N" TYPE="LVM2_member" PARTUUID="97be5b6a-01"
/dev/sda5: UUID="W5i2fK-Up60-LCGp-qIrI-e1q1-Ycye-LwEhpl" TYPE="LVM2_member" PARTUUID="b8213fff-05"
/dev/sda1: UUID="de772acf-c0c7-4dbc-b213-2ce826d6e055" BLOCK_SIZE="1024" TYPE="ext2" PARTUUID="b8213fff-01"
/dev/mapper/Vol1-lvtest: UUID="f085a0cc-2c4d-42d1-a8e0-601abbf9a10e" BLOCK_SIZE="4096" TYPE="ext4"
/dev/mapper/HsServer--vg-var: UUID="dc8871ab-f3b6-476d-b5d4-9f4e6f5b5b5d" BLOCK_SIZE="4096" TYPE="ext4"
umount /dev/mapper/Vol1-lvtest
6.2 删除逻辑卷
root@HsServer:~# lvremove /dev/mapper/Vol1-lvtest
Do you really want to remove active logical volume Vol1/lvtest? [y/n]: y
Logical volume "lvtest" successfully removed.
6.3 删除卷组
root@HsServer:~# vgremove Vol1
Volume group "Vol1" successfully removed
6.4 删除物理卷
root@HsServer:~# pvremove /dev/sdc1
Labels on physical volume "/dev/sdc1" successfully wiped.
查看结果
root@HsServer:~# lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINTS
sda 8:0 0 931.5G 0 disk
|-sda1 8:1 0 487M 0 part /boot
|-sda2 8:2 0 1K 0 part
`-sda5 8:5 0 931G 0 part
|-HsServer--vg-root 254:0 0 23.3G 0 lvm /
|-HsServer--vg-swap_1 254:1 0 976M 0 lvm [SWAP]
|-HsServer--vg-tmp 254:2 0 1.9G 0 lvm /tmp
`-HsServer--vg-var 254:3 0 300G 0 lvm /var
sdb 8:16 0 111.8G 0 disk
|-sdb1 8:17 0 100M 0 part
|-sdb2 8:18 0 67.9G 0 part
|-sdb3 8:19 0 1K 0 part
`-sdb5 8:21 0 43.8G 0 part
sdc 8:32 0 1.8T 0 disk
|-sdc1 8:33 0 500G 0 part
`-sdc2 8:34 0 1T 0 part
`-Vol2-lvtest 254:4 0 1024G 0 lvm /home
6.5 删除分区
root@HsServer:~# fdisk /dev/sdc
Welcome to fdisk (util-linux 2.38.1).
Changes will remain in memory only, until you decide to write them.
Be careful before using the write command.
This disk is currently in use - repartitioning is probably a bad idea.
It's recommended to umount all file systems, and swapoff all swap
partitions on this disk.
Command (m for help): p
Disk /dev/sdc: 1.82 TiB, 2000398934016 bytes, 3907029168 sectors
Disk model: ST2000DM001-1ER1
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disklabel type: dos
Disk identifier: 0x97be5b6a
Device Boot Start End Sectors Size Id Type
/dev/sdc1 2048 1048578047 1048576000 500G 1 FAT12
/dev/sdc2 1048578048 3196061695 2147483648 1T 8e Linux LVM
Command (m for help): d
Partition number (1,2, default 2): 1
Partition 1 has been deleted.
Command (m for help): w
The partition table has been altered.
Syncing disks.
查看结果：
root@HsServer:~# lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINTS
sda 8:0 0 931.5G 0 disk
|-sda1 8:1 0 487M 0 part /boot
|-sda2 8:2 0 1K 0 part
`-sda5 8:5 0 931G 0 part
|-HsServer--vg-root 254:0 0 23.3G 0 lvm /
|-HsServer--vg-swap_1 254:1 0 976M 0 lvm [SWAP]
|-HsServer--vg-tmp 254:2 0 1.9G 0 lvm /tmp
`-HsServer--vg-var 254:3 0 300G 0 lvm /var
sdb 8:16 0 111.8G 0 disk
|-sdb1 8:17 0 100M 0 part
|-sdb2 8:18 0 67.9G 0 part
|-sdb3 8:19 0 1K 0 part
`-sdb5 8:21 0 43.8G 0 part
sdc 8:32 0 1.8T 0 disk
`-sdc2 8:34 0 1T 0 part
`-Vol2-lvtest 254:4 0 1024G 0 lvm /home
7 扩容
7.1 查看之前的状况
root@HsServer:~# df -Th
Filesystem Type Size Used Avail Use% Mounted on
udev devtmpfs 11G 0 11G 0% /dev
tmpfs tmpfs 2.2G 3.1M 2.2G 1% /run
/dev/mapper/HsServer--vg-root ext4 23G 11G 11G 50% /
tmpfs tmpfs 11G 0 11G 0% /dev/shm
tmpfs tmpfs 5.0M 16K 5.0M 1% /run/lock
/dev/mapper/Vol2-lvtest ext4 1007G 56G 901G 6% /home
/dev/sda1 ext2 455M 216M 215M 51% /boot
/dev/mapper/HsServer--vg-tmp ext4 1.8G 80K 1.7G 1% /tmp
/dev/mapper/HsServer--vg-var ext4 295G 9.5G 270G 4% /var
tmpfs tmpfs 2.2G 56K 2.2G 1% /run/user/113
tmpfs tmpfs 2.2G 44K 2.2G 1% /run/user/0
root@HsServer:~# lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINTS
sda 8:0 0 931.5G 0 disk
|-sda1 8:1 0 487M 0 part /boot
|-sda2 8:2 0 1K 0 part
`-sda5 8:5 0 931G 0 part
|-HsServer--vg-root 254:0 0 23.3G 0 lvm /
|-HsServer--vg-swap_1 254:1 0 976M 0 lvm [SWAP]
|-HsServer--vg-tmp 254:2 0 1.9G 0 lvm /tmp
`-HsServer--vg-var 254:3 0 300G 0 lvm /var
sdb 8:16 0 111.8G 0 disk
|-sdb1 8:17 0 100M 0 part
|-sdb2 8:18 0 67.9G 0 part
|-sdb3 8:19 0 1K 0 part
`-sdb5 8:21 0 43.8G 0 part
sdc 8:32 0 1.8T 0 disk
|-sdc1 8:33 0 500G 0 part
| `-Vol2-lvtest 254:4 0 1T 0 lvm /home
`-sdc2 8:34 0 1T 0 part
`-Vol2-lvtest 254:4 0 1T 0 lvm /home
7.2 扩展物理卷
root@HsServer:~# lvextend -L +10G /dev/mapper/HsServer--vg-var
Size of logical volume HsServer-vg/var changed from 300.00 GiB (76800 extents) to 310.00 GiB (79360 extents).
Logical volume HsServer-vg/var successfully resized.
查看扩容后的结果：
root@HsServer:~# df -TH
Filesystem Type Size Used Avail Use% Mounted on
udev devtmpfs 12G 0 12G 0% /dev
tmpfs tmpfs 2.3G 3.3M 2.3G 1% /run
/dev/mapper/HsServer--vg-root ext4 25G 12G 12G 50% /
tmpfs tmpfs 12G 0 12G 0% /dev/shm
tmpfs tmpfs 5.3M 17k 5.3M 1% /run/lock
/dev/mapper/Vol2-lvtest ext4 1.1T 60G 967G 6% /home
/dev/sda1 ext2 477M 227M 225M 51% /boot
/dev/mapper/HsServer--vg-tmp ext4 2.0G 82k 1.9G 1% /tmp
/dev/mapper/HsServer--vg-var ext4 316G 11G 290G 4% /var
tmpfs tmpfs 2.3G 58k 2.3G 1% /run/user/113
tmpfs tmpfs 2.3G 46k 2.3G 1% /run/user/0