1 查看可用设备信息
[root@YYCPYFZX-4 ~]# lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sr0 11:0 1 492K 0 rom
vda 252:0 0 50G 0 disk
├─vda1 252:1 0 1G 0 part /boot
└─vda2 252:2 0 19G 0 part
├─centos-root 253:0 0 17G 0 lvm /
└─centos-swap 253:1 0 2G 0 lvm [SWAP]
vdb 252:16 0 300G 0 disk其中vdb为需要挂载使用的磁盘
2 格式化磁盘
[root@YYCPYFZX-4 /]# mkfs.ext4 /dev/vdb
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
19660800 inodes, 78643200 blocks
3932160 blocks (5.00%) reserved for the super user
First data block=0
Maximum filesystem blocks=2227175424
2400 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
Allocating group tables: done
Writing inode tables: done
Creating journal (32768 blocks): done
Writing superblocks and filesystem accounting information: done
[root@YYCPYFZX-4 /]#3 磁盘分区
[root@YYCPYFZX-4 /]# 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 0xd268e58e.
Command (m for help): m
Command action
a toggle a bootable flag
b edit bsd disklabel
c toggle the dos compatibility flag
d delete a partition
g create a new empty GPT partition table
G create an IRIX (SGI) partition table
l list known partition types
m print this menu
n add a new partition
o create a new empty DOS partition table
p print the partition table
q quit without saving changes
s create a new empty Sun disklabel
t change a partition's system id
u change display/entry units
v verify the partition table
w write table to disk and exit
x extra functionality (experts only)
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):
First sector (2048-629145599, default 2048):
Using default value 2048
Last sector, +sectors or +size{K,M,G} (2048-629145599, default 629145599):
Using default value 629145599
Partition 1 of type Linux and of size 300 GiB is set
Command (m for help): w
The partition table has been altered!
Calling ioctl() to re-read partition table.
Syncing disks.
[root@YYCPYFZX-4 /]#4 创建物理卷
[root@YYCPYFZX-4 /]# pvcreate /dev/vdb1
Physical volume "/dev/vdb1" successfully created.
[root@YYCPYFZX-4 /]#如果有警告信息如下:
[root@appli-29 ~]# pvcreate /dev/vdb1
WARNING: Device for PV qdp443-BlHU-rjf4-u7fd-eoW4-0pHX-C4fZTf not found or rejected by a filter.
Couldn't find device with uuid qdp443-BlHU-rjf4-u7fd-eoW4-0pHX-C4fZTf.
Physical volume "/dev/vdb1" successfully created.
[root@appli-29 ~]#原因是磁盘未卸载引起的, 需要卸载磁盘后从第一步重新执行, 且在分区后执行以下命令清理未知的vg, 命令中的centos为第5步中VG Name的值
[root@appli-29 ~]# vgreduce --removemissing centos
WARNING: Device for PV qdp443-BlHU-rjf4-u7fd-eoW4-0pHX-C4fZTf not found or rejected by a filter.
Couldn't find device with uuid qdp443-BlHU-rjf4-u7fd-eoW4-0pHX-C4fZTf.
Wrote out consistent volume group centos.
[root@appli-29 ~]#
[root@appli-29 ~]#
[root@appli-29 ~]# pvcreate /dev/vdb1
Physical volume "/dev/vdb1" successfully created.
[root@appli-29 ~]#5 查看卷分组
[root@YYCPYFZX-4 /]# vgdisplay -v
--- Volume group ---
VG Name centos
System ID
Format lvm2
Metadata Areas 1
Metadata Sequence No 3
VG Access read/write
VG Status resizable
MAX LV 0
Cur LV 2
Open LV 2
Max PV 0
Cur PV 1
Act PV 1
VG Size <19.00 GiB
PE Size 4.00 MiB
Total PE 4863
Alloc PE / Size 4863 / <19.00 GiB
Free PE / Size 0 / 0
VG UUID 0NnNoU-AOBX-tAmD-wKrg-hBxb-QYww-uX1ffX
--- Logical volume ---
LV Path /dev/centos/root
LV Name root
VG Name centos
LV UUID zneuwA-aMid-kLI9-0n5K-DM5S-D2Fj-bEjDcE
LV Write Access read/write
LV Creation host, time localhost, 2021-06-30 15:20:50 +0800
LV Status available
# open 1
LV Size <17.00 GiB
Current LE 4351
Segments 1
Allocation inherit
Read ahead sectors auto
- currently set to 8192
Block device 253:0
--- Logical volume ---
LV Path /dev/centos/swap
LV Name swap
VG Name centos
LV UUID sJxNvX-JNsY-Kyct-Rvav-QKWQ-QqAe-CoQn4R
LV Write Access read/write
LV Creation host, time localhost, 2021-06-30 15:20:50 +0800
LV Status available
# open 2
LV Size 2.00 GiB
Current LE 512
Segments 1
Allocation inherit
Read ahead sectors auto
- currently set to 8192
Block device 253:1
--- Physical volumes ---
PV Name /dev/vda2
PV UUID loBcOa-4Uo3-Alex-nR3o-YbcF-FXFe-0XLGNZ
PV Status allocatable
Total PE / Free PE 4863 / 0
[root@YYCPYFZX-4 /]#6 扩展卷分组
命令中的'centos'为上一步看到的卷分组中的VG Name的值
[root@YYCPYFZX-4 /]# vgextend centos /dev/vdb1
Volume group "centos" successfully extended
[root@YYCPYFZX-4 /]#7 扩展逻辑卷
其中卷的大小需要小于磁盘大小
[root@YYCPYFZX-4 /]# lvextend -L +299G /dev/centos/root
Size of logical volume centos/root changed from <17.00 GiB (4351 extents) to <316.00 GiB (80895 extents).
Logical volume centos/root successfully resized.
[root@YYCPYFZX-4 /]#8 同步文件系统
[root@YYCPYFZX-4 /]# xfs_growfs /dev/mapper/centos-root
meta-data=/dev/mapper/centos-root isize=512 agcount=4, agsize=1113856 blks
= sectsz=512 attr=2, projid32bit=1
= crc=1 finobt=0 spinodes=0
data = bsize=4096 blocks=4455424, imaxpct=25
= sunit=0 swidth=0 blks
naming =version 2 bsize=4096 ascii-ci=0 ftype=1
log =internal bsize=4096 blocks=2560, version=2
= sectsz=512 sunit=0 blks, lazy-count=1
realtime =none extsz=4096 blocks=0, rtextents=0
data blocks changed from 4455424 to 82836480
[root@YYCPYFZX-4 /]#9 查看磁盘信息
[root@YYCPYFZX-4 /]# df -h
Filesystem Size Used Avail Use% Mounted on
devtmpfs 7.8G 0 7.8G 0% /dev
tmpfs 7.8G 0 7.8G 0% /dev/shm
tmpfs 7.8G 8.8M 7.8G 1% /run
tmpfs 7.8G 0 7.8G 0% /sys/fs/cgroup
/dev/mapper/centos-root 316G 1.7G 315G 1% /
/dev/vda1 1014M 150M 865M 15% /boot
[root@YYCPYFZX-4 /]#10 重启系统确认磁盘状态是否正常
[root@YYCPYFZX-4 /]# reboot