实验
从两块磁盘中各取10G，组成20G的卷组。从卷组中划分一个16G的逻辑卷，将此逻辑卷格式化，并挂载到/mbox。
1。添加磁盘sdb并给磁盘划分一个10G的区出来
[root@localhost ~]# fdisk /dev/sdb
WARNING: DOS-compatible mode is deprecated. It's strongly recommended to
switch off the mode (command 'c') and change display units to
sectors (command 'u').
Command (m for help): p
Partition number (1-4): 1
First cylinder (1-10443, default 1):
Using default value 1
Last cylinder, +cylinders or +size{K,M,G} (1-10443, default 10443): +10G
2.将划分出来的一个区格式改为LVM
Command (m for help): t
Selected partition 1
Hex code (type L to list codes): 8e
Changed system type of partition 1 to 8e (Linux LVM)
Command (m for help): p {输入p查看创建磁盘分区信息}
Disk /dev/sdb: 85.9 GB, 85899345920 bytes
255 heads, 63 sectors/track, 10443 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: 0x8ba5d75e
Device Boot Start End Blocks Id System
/dev/sdb1 1 1306 10490413+ 8e Linux LVM
Command (m for help): w {确认创建OK后输入w保存
3.添加第二块磁盘重复以上1.2.操作
4.查看两块LVM磁盘是否OK
[root@localhost ~]# fdisk -l |grep LVM
/dev/sdb1 1 1306 10490413+ 8e Linux LVM
/dev/sdc1 1 1306 10490413+ 8e Linux LVM
5.创建PV
[root@localhost ~]# pvcreate /dev/sdb1 /dev/sdc1
dev_is_mpath: failed to get device for 8:17
Physical volume "/dev/sdb1" successfully created
dev_is_mpath: failed to get device for 8:33
Physical volume "/dev/sdc1" successfully created
6.查看创建所创建的PV
[root@localhost ~]# pvscan
PV /dev/sdb1 lvm2 [10.00 GiB]
PV /dev/sdc1 lvm2 [10.00 GiB]
Total: 2 [20.01 GiB] / in use: 0 [0 ] / in no VG: 2 [20.01 GiB]
7.查看PV详细信息
[root@localhost ~]# pvdisplay
"/dev/sdb1" is a new physical volume of "10.00 GiB"
--- NEW Physical volume ---
PV Name /dev/sdb1
VG Name
PV Size 10.00 GiB
Allocatable NO
PE Size 0
Total PE 0
Free PE 0
Allocated PE 0
PV UUID ZeKDrx-nPLC-t3rc-osP1-122x-lU1A-yWBjFs
"/dev/sdc1" is a new physical volume of "10.00 GiB"
--- NEW Physical volume ---
PV Name /dev/sdc1
VG Name
PV Size 10.00 GiB
Allocatable NO
PE Size 0
Total PE 0
Free PE 0
Allocated PE 0
PV UUID BKbSSe-Tugx-KUgi-lIew-LH5Y-PBzo-KEZvWt
8.创建VG [命名为data_vg]
[root@localhost ~]# vgcreate data_vg /dev/sdb1 /dev/sdc1
Device data_vg not found (or ignored by filtering).
dev_is_mpath: failed to get device for 8:17
Physical volume "/dev/sdb1" successfully created
Physical volume "/dev/sdc1" successfully created
[root@localhost ~]# vgdisplay
--- Volume group ---
VG Name data_vg
System ID
Format lvm2
Metadata Areas 2
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 2
Act PV 2
VG Size 20.00 GiB
PE Size 4.00 MiB
Total PE 5120
Alloc PE / Size 0 / 0
Free PE / Size 5120 / 20.00 GiB
VG UUID lGJtbL-E71i-aSch-AX01-nbyB-T8yN-ojJ4z1
9.从创建的20G的vg中划分出16G [命名为data_lv]
[root@localhost ~]# lvcreate -L 16G -n data_lv data_vg
Logical volume "data_lv" created
10.对划分出来的16Glv格式化为ext3格式
[root@localhost ~]# mkfs.ext3 /dev//data_vg/data_lv
mke2fs 1.41.12 (17-May-2010)
文件系统标签=
操作系统:Linux
块大小=4096 (log=2)
分块大小=4096 (log=2)
Stride=0 blocks, Stripe width=0 blocks
1048576 inodes, 4194304 blocks
209715 blocks (5.00%) reserved for the super user
第一个数据块=0
Maximum filesystem blocks=4294967296
128 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
正在写入inode表: 完成
Creating journal (32768 blocks): 完成
Writing superblocks and filesystem accounting information: 完成
11.创建/mbox并将/data_lv挂在到/mbox
[root@localhost ~]# mkdir /mbox
[root@localhost ~]# mount /dev/data_vg/data_lv /mbox
12.输入df -h查看挂载信息
[root@localhost ~]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/sda2 97G 4.0G 88G 5% /
tmpfs 932M 556K 931M 1% /dev/shm
/dev/sda1 194M 34M 151M 19% /boot
/dev/sda3 97G 188M 92G 1% /data
/dev/sr0 3.6G 3.6G 0 100% /media/RHEL_6.5 x86_64 Disc 1
/dev/mapper/data_vg-data_lv 16G 173M 15G 2% /mbox
[root@localhost ~]#