[root@lvm ~]#
[root@lvm ~]# pvcreate /dev/sd[de]
Physical volume "/dev/sdd" successfully created
Physical volume "/dev/sde" successfully created
==========
[root@lvm ~]# pvcreate /dev/sdf 创建pv
Physical volume "/dev/sdf" successfully created
===========
[root@lvm ~]# pvdisplay /dev/sde 显示下pv的详细信息
"/dev/sde" is a new physical volume of "20.00 GB"
--- NEW Physical volume ---
PV Name /dev/sde
VG Name
PV Size 20.00 GB
Allocatable NO
PE Size (KByte) 0
Total PE 0
Free PE 0
Allocated PE 0
PV UUID R4WGy1-ui4I-gsrB-EkFu-grfi-w4hN-VCkj3n
=============
[root@lvm ~]# pvscan 扫描下pv
PV /dev/sdd lvm2 [12.00 GB]
PV /dev/sde lvm2 [20.00 GB]
PV /dev/sdf lvm2 [20.00 GB]
Total: 3 [52.00 GB] / in use: 0 [0 ] / in no VG: 3 [52.00 GB]
=============
vgcreate photo /dev/sd[def] 创建vg
======
[root@lvm ~]# vgscan 扫描vg
Reading all physical volumes. This may take a while...
Found volume group "photo" using metadata type lvm2
===========
[root@lvm ~]# vgdisplay 显示vg的信息
--- Volume group ---
VG Name photo
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 51.99 GB
PE Size 4.00 MB
Total PE 13309
Alloc PE / Size 0 / 0
Free PE / Size 13309 / 51.99 GB
VG UUID PLphxo-OP8v-ZSwy-Lw6C-0tqD-EvsJ-RdJ2FZ
================
[root@lvm ~]# pvscan
PV /dev/sdd VG photo lvm2 [12.00 GB / 12.00 GB free]
PV /dev/sde VG photo lvm2 [20.00 GB / 20.00 GB free]
PV /dev/sdf VG photo lvm2 [20.00 GB / 20.00 GB free]
Total: 3 [51.99 GB] / in use: 3 [51.99 GB] / in no VG: 0 [0 ]
可以查询哪个pv属于哪个vg
==========
[root@lvm ~]# lvcreate -L 20G -n 7yue5 photo
/dev/cdrom: open failed: 只读文件系统
Logical volume "7yue5" created
========
-L 指定大小
-n 指定lv的名字
7yue5 是lv的名字
photo是vg的名字
==================
[root@lvm ~]# lvcreate -L 25G -n 9yue5 photo
/dev/cdrom: open failed: 只读文件系统
Logical volume "9yue5" created
[root@lvm ~]# lvscan
ACTIVE '/dev/photo/7yue5' [20.00 GB] inherit
ACTIVE '/dev/photo/9yue5' [25.00 GB] inherit
===========
[root@lvm ~]# mkfs.ext3 /dev/photo/7yue5
[root@lvm ~]# mkfs.ext3 /dev/photo/9yue5
========
修改/etc/fstab文件
添加
/dev/photo/7yue5 /7yue5 ext3 defaults 0 0
/dev/photo/9yue5 /9yue5 ext3 defaults 0 0
============
实现开机自动挂载
==============
[root@lvm ~]# mkdir /7yue5
[root@lvm ~]# mkdir /9yue5
新建挂载点
=================
mount -a
==========
扩容vg
1.[root@lvm ~]# pvcreate /dev/sdg
Physical volume "/dev/sdg" successfully created
[root@lvm ~]# pvcreate /dev/sdh
Physical volume "/dev/sdh" successfully created
2.[root@lvm ~]# vgextend photo /dev/sd[gh]
/dev/cdrom: open failed: 只读文件系统
/dev/cdrom: open failed: 只读文件系统
Attempt to close device '/dev/cdrom' which is not open.
Volume group "photo" successfully extended
给photo 这个vg扩容，增加了2个pv进来
===================
扩容lv
1.[root@lvm 7yue5]# lvextend -L +20G /dev/photo/7yue5
扩容20G
/dev/cdrom: open failed: 只读文件系统
Extending logical volume 7yue5 to 40.00 GB
2.[root@lvm 7yue5]# resize2fs /dev/photo/7yue5 重新识别文件系统的大小
resize2fs 1.39 (29-May-2006)
Filesystem at /dev/photo/7yue5 is mounted on /7yue5; on-line resizing required
Performing an on-line resize of /dev/photo/7yue5 to 10485760 (4k) blocks.
The filesystem on /dev/photo/7yue5 is now 10485760 blocks long.
3.df -Th 查看是否生效
===========
