Linux怎样创建LVM-创新互联

这篇文章给大家介绍Linux怎样创建LVM，内容非常详细，感兴趣的小伙伴们可以参考借鉴，希望对大家能有所帮助。

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Linux 创建LVM(Logical Volume)

近期和其它同事参与了存储的划分，由于工作性质，这方面的命令已经特别陌生，重新梳理了LVM创建过程，以便不时之需；

---1 操作系统版本
[root@chen ~]# cat /etc/issue
Red Hat Enterprise Linux Server release 6.4 (Santiago)
Kernel \r on an \m

---2 需要创建LVM的磁盘
[root@chen ~]# fdisk -l

Disk /dev/sdb: 1073 MB, 1073741824 bytes
255 heads, 63 sectors/track, 130 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/sdc: 1073 MB, 1073741824 bytes
255 heads, 63 sectors/track, 130 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/sdd: 1073 MB, 1073741824 bytes
255 heads, 63 sectors/track, 130 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

---3 创建PV(Physical Volume)
[root@chen ~]# pvcreate /dev/sdb
Physical volume "/dev/sdb" successfully created
[root@chen ~]# pvcreate /dev/sdc
Physical volume "/dev/sdc" successfully created
[root@chen ~]# pvcreate /dev/sdd
Physical volume "/dev/sdd" successfully created

---4 查看PV
[root@chen ~]# pvdisplay
"/dev/sdb" is a new physical volume of "1.00 GiB"
--- NEW Physical volume ---
PV Name /dev/sdb
VG Name
PV Size 1.00 GiB
Allocatable NO
PE Size 0
Total PE 0
Free PE 0
Allocated PE 0
PV UUID JA8nPJ-LP8N-cw1U-qCY3-0yiD-yYJd-XiiHBq

"/dev/sdc" is a new physical volume of "1.00 GiB"
--- NEW Physical volume ---
PV Name /dev/sdc
VG Name
PV Size 1.00 GiB
Allocatable NO
PE Size 0
Total PE 0
Free PE 0
Allocated PE 0
PV UUID CRoe30-68V7-vVgt-QKss-kS3H-pufb-znImot

"/dev/sdd" is a new physical volume of "1.00 GiB"
--- NEW Physical volume ---
PV Name /dev/sdd
VG Name
PV Size 1.00 GiB
Allocatable NO
PE Size 0
Total PE 0
Free PE 0
Allocated PE 0
PV UUID sb7VKF-JY1B-vACE-hUZI-e2KQ-PfXe-CMCBVF

[root@chen ~]# pvscan
PV /dev/sdb lvm2 [1.00 GiB]
PV /dev/sdc lvm2 [1.00 GiB]
PV /dev/sdd lvm2 [1.00 GiB]
Total: 3 [3.00 GiB] / in use: 0 [0 ] / in no VG: 3 [3.00 GiB]

---5 创建VG(Volumne Group)
[root@chen ~]# vgcreate VolGroup001 /dev/sdb /dev/sdc /dev/sdd
Volume group "VolGroup001" successfully created

---6 查看VG
[root@chen ~]# vgdisplay
--- Volume group ---
VG Name VolGroup001
System ID
Format lvm2
Metadata Areas 3
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 3
Act PV 3
VG Size 2.99 GiB
PE Size 4.00 MiB
Total PE 765
Alloc PE / Size 0 / 0
Free PE / Size 765 / 2.99 GiB
VG UUID DwFmKs-LONs-aF91-vrHt-9C9S-YoyQ-CLGwRn

[root@chen ~]# vgscan
Reading all physical volumes. This may take a while...
Found volume group "VolGroup001" using metadata type lvm2

---7 创建LV(Logical Volume)
[root@chen ~]# lvcreate -L 2G -n lvData01 VolGroup001
Logical volume "lvData01" created

---8 查看LV
[root@chen ~]# lvdisplay
--- Logical volume ---
LV Path /dev/VolGroup001/lvData01
LV Name lvData01
VG Name VolGroup001
LV UUID 5V8LUf-I835-isBg-l0zN-tfhI-XmkS-sibQ7s
LV Write Access read/write
LV Creation host, time chen, 2018-04-19 23:43:42 +0800
LV Status available
# open 0
LV Size 2.00 GiB
Current LE 512
Segments 3
Allocation inherit
Read ahead sectors auto
- currently set to 256
Block device 253:0

[root@chen ~]# lvscan
ACTIVE '/dev/VolGroup001/lvData01' [2.00 GiB] inherit

[root@chen ~]# fdisk -l
......
Disk /dev/mapper/VolGroup001-lvData01: 2147 MB, 2147483648 bytes
255 heads, 63 sectors/track, 261 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

---9 格式化
[root@chen ~]# mkfs -t ext4 /dev/mapper/VolGroup001-lvData01

---10 挂载
[root@chen ~]# mkdir /data
[root@chen ~]# mount /dev/VolGroup001/lvData01 /data
[root@chen ~]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/sda3 48G 29G 16G 65% /
tmpfs 932M 76K 932M 1% /dev/shm
/dev/sda1 194M 33M 152M 18% /boot
/dev/sr0 3.5G 3.5G 0 100% /media/RHEL_6.4 x86_64 Disc 1
/dev/mapper/VolGroup001-lvData01
2.0G 67M 1.9G 4% /data

[root@chen ~]# vi /etc/fstab
/dev/mapper/VolGroup001-lvData01 /data ext4 defaults 0 0

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