LVM操作命令

1. 磁盘分区，修改分区的systemid

#创建分区
fdisk /dev/sdb
Command (m for help): n
Command action
	 e   extended//扩展分区，创
	 p   primary partition (1-4)//主分区，最多创建4个~~ 
	p
 Device Boot      Start         End      Blocks   Id  System
	/dev/sdb1               1        2610    20964793+   5  Extended
	/dev/sdb5               1        1306    10490382   83  Linux
	/dev/sdb6            1307        2610    10474348+  83  Linux~~ 
	#格式化分区为8e
	Command (m for help): t
	Partition number (1-5): 1　　
	Hex code (type L to list codes): 8e
	Command (m for help):  w　//写入磁盘，保存并退出
	partprobe //重新加载分区

2.新建pv，vg，lv

pvcreate /dev/sdb1
	pvdisplay
	vgcreate datavg /dev/sdb1 
	vgdisplay
	lvcreate -L 10G -n lvmysql datavg
	mkfs.ext3 /dev/datavg/lvmysql
	mkdir -p /home/mysql
	mount /dev/datavg/lvmysql /home/mysql
	echo '/dev/datavg/lvmysql /home/mysql ext3 defaults 0 0 ' > /etc/fstab