说明：系统版本为 Linux version 3.10.0-327.el7.x86_64
step1. 查看现有磁盘信息，可以看出根分区有45G
[root@8ahk ~]# df -h
Filesystem Size Used Avail Use% Mounted on/dev/mapper/CentOS_mb--centos7-root 45G 9.8G 35G 23% /devtmpfs 5.9G 0 5.9G 0% /dev
tmpfs 5.9G 84K 5.9G 1% /dev/shm
tmpfs 5.9G 8.9M 5.9G 1% /run
tmpfs 5.9G 0 5.9G 0% /sys/fs/cgroup/dev/sda1 497M 142M 356M 29% /boot
tmpfs 1.2G 16K 1.2G 1% /run/user/42tmpfs 1.2G 0 1.2G 0% /run/user/0step2. 查看新增加的磁盘信息
[root@8ahk ~]# fdisk -l
Disk /dev/sda: 53.7 GB, 53687091200 bytes, 104857600 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 label type: dos
Disk identifier: 0x000e0945
Device Boot Start End Blocks Id System/dev/sda1 * 2048 1026047 512000 83 Linux/dev/sda2 1026048 104857599 51915776 8e Linux LVM
Disk /dev/sdb: 107.4 GB, 107374182400 bytes, 209715200 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/centos_mb--centos7-root: 47.7 GB, 47747956736 bytes, 93257728 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/centos_mb--centos7-swap: 5368 MB, 5368709120 bytes, 10485760 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytesstep3. 根据以上信息，对新增加的磁盘进行分区
[root@8ahk ~]# fdisk /dev/sdb
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 0x232defba.
Command (m for help): pDisk /dev/sdb: 107.4 GB, 107374182400 bytes, 209715200 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 label type: dos
Disk identifier: 0x232defba
Device Boot Start End Blocks Id System
Command (m for help): nPartition type:
p primary (0 primary, 0 extended, 4 free)
e extended
select (default p): pPartition number (1-4, default 1): 1First sector (2048-209715199, default 2048):
Using default value 2048Last sector, +sectors or +size{K,M,G} (2048-209715199, default 209715199):
Using default value 209715199Partition 1 of type Linux and of size 100 GiB is set
Command (m for help): tselected partition 1Hex code (type L to list all codes): L 0 Empty 24 NEC DOS 81 Minix / old Lin bf Solaris
1 FAT12 27 Hidden NTFS Win 82 Linux swap / So c1 DRDOS/sec (FAT- 2 XENIX root 39 Plan 9 83 Linux c4 DRDOS/sec (FAT- 3 XENIX usr 3c PartitionMagic 84 OS/2 hidden C: c6 DRDOS/sec (FAT- 4 FAT16 <32M 40 Venix 80286 85 Linux extended c7 Syrinx
5 Extended 41 PPC PReP Boot 86 NTFS volume set da Non-FS data
6 FAT16 42 SFS 87 NTFS volume set db CP/M / CTOS / . 7 HPFS/NTFS/exFAT 4d QNX4.x 88 Linux plaintext de Dell Utility
8 AIX 4e QNX4.x 2nd part 8e Linux LVM df BootIt
9 AIX bootable 4f QNX4.x 3rd part 93 Amoeba e1 DOS access
a OS/2 Boot Manag 50 OnTrack DM 94 Amoeba BBT e3 DOS R/O
b W95 FAT32 51 OnTrack DM6 Aux 9f BSD/OS e4 SpeedStor
c W95 FAT32 (LBA) 52 CP/M a0 IBM Thinkpad hi eb BeOS fs
e W95 FAT16 (LBA) 53 OnTrack DM6 Aux a5 FreeBSD ee GPT
f W95 Ext\'d (LBA) 54 OnTrackDM6 a6 OpenBSD ef EFI (FAT-12/16/10 OPUS 55 EZ-Drive a7 NeXTSTEP f0 Linux/PA-RISC b11 Hidden FAT12 56 Golden Bow a8 Darwin UFS f1 SpeedStor
12 Compaq diagnost 5c Priam Edisk a9 NetBSD f4 SpeedStor
14 Hidden FAT16 <3 61 SpeedStor ab Darwin boot f2 DOS secondary
16 Hidden FAT16 63 GNU HURD or Sys af HFS / HFS+ fb VMware VMFS
17 Hidden HPFS/NTF 64 Novell Netware b7 BSDI fs fc VMware VMKCORE
18 AST SmartSleep 65 Novell Netware b8 BSDI swap fd Linux raid auto
1b Hidden W95 FAT3 70 DiskSecure Mult bb Boot Wizard hid fe LANstep
1c Hidden W95 FAT3 75 PC/IX be Solaris boot ff BBT
1e Hidden W95 FAT1 80 Old Minix
Hex code (type L to list all codes): 8eChanged type of partition \'Linux\' to \'Linux LVM\'Command (m for help): pDisk /dev/sdb: 107.4 GB, 107374182400 bytes, 209715200 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 label type: dos
Disk identifier: 0x232defba
Device Boot Start End Blocks Id System/dev/sdb1 2048 209715199 104856576 8e Linux LVM
Command (m for help): wThe partition table has been altered!Calling ioctl() to re-read partition table.
Syncing disks.step4. 创建物理卷
[root@8ahk ~]# pvcreate /dev/sdb1
Physical volume \"/dev/sdb1\" successfully createdstep5. 查看物理卷信息
[root@8ahk ~]# pvdisplay --- Physical volume ---
PV Name /dev/sda2
VG Name centos_mb-centos7
PV Size 49.51 GiB / not usable 3.00 MiB
Allocatable yes
PE Size 4.00 MiB
Total PE 12674
Free PE 10
Allocated PE 12664
PV UUID 8WbgjB-T1Lf-kqUD-qPFw-UwJu-B9Lc-GAUTUB
\"/dev/sdb1\" is a new physical volume of \"100.00 GiB\"
--- NEW Physical volume ---
PV Name /dev/sdb1
VG Name
PV Size 100.00 GiB
Allocatable NO
PE Size 0
Total PE 0
Free PE 0
Allocated PE 0
PV UUID HOknRs-TnMy-wtfX-sGqD-5RK9-dk9q-ze13fj
[root@8ahk ~]# vgdisplay --- Volume group ---
VG Name centos_mb-centos7
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 &a