How does Linux create LVM
This article introduces Linux how to create LVM, the content is very detailed, interested friends can refer to, hope to be helpful to you.
Linux create LVM (Logical Volume)
Recently, I have participated in the division of storage with other colleagues. Because of the nature of the work, the commands in this area have become particularly unfamiliar. We have reorganized the LVM creation process for a rainy day.
-1 operating system version
[root@chen ~] # cat / etc/issue
Red Hat Enterprise Linux Server release 6.4 (Santiago)
Kernel\ r on an\ m
-2 A disk for LVM needs to be created
[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 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 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 size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000
-3 create 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 View 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 create VG (Volumne Group)
[root@chen ~] # vgcreate VolGroup001 / dev/sdb / dev/sdc / dev/sdd
Volume group "VolGroup001" successfully created
-6 View 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 create LV (Logical Volume)
[root@chen] # lvcreate-L 2G-n lvData01 VolGroup001
Logical volume "lvData01" created
-8 View 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 size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000
-9 formatting
[root@chen] # mkfs-t ext4 / dev/mapper/VolGroup001-lvData01
-10 mounting
[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 percent 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 00
On how to create Linux LVM to share here, I hope that the above content can be of some help to you, can learn more knowledge. If you think the article is good, you can share it for more people to see.
