Linux下逻辑卷创建与管理
用虚拟机加一块硬盘后，查看硬盘状况，使用fdisk-l命令：
[root@jerrybj ~]# fdisk -l
Disk /dev/sda: 21.4 GB, 21474836480 bytes
255 heads, 63 sectors/track, 2610 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System
/dev/sda1 * 1 13 104391 83 Linux
/dev/sda2 14 2610 20860402+ 8e Linux LVM
Disk /dev/sdb: 34.3 GB, 34359738368 bytes
255 heads, 63 sectors/track, 4177 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Disk /dev/sdb doesn't contain a valid partition table
其中/dev/sdb是新添加的，一会拿来做逻辑卷。
下面继续添加partition：
[root@jerrybj ~]# fdisk /dev/sdb
Command (m for help): n
Command action
e extended
p primary partition (1-4)
p
Partition number (1-4): 1
First cylinder (1-4177, default 1):
Using default value 1
Last cylinder or +size or +sizeM or +sizeK (1-4177, default4177):
Using default value 4177
Command (m for help): p
Disk /dev/sdb: 34.3 GB, 34359738368 bytes
255 heads, 63 sectors/track, 4177 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System
/dev/sdb1 1 4177 33551721 83 Linux
Command (m for help): w
The partition table has been altered!
Calling ioctl() to re-read partition table.
Syncing disks.
现在我把linux类型 分成LinuxLVM类型。
[root@jerrybj ~]# fdisk /dev/sdb
Command (m for help): t
Hex code (type L to list codes): L
。。。
Hex code (type L to list codes): 8e
Changed system type of partition 1 to 8e (Linux LVM)
Command (m for help): w
下面创建pv、vg、lv
[root@jerrybj ~]# pv
pvchange pvcreate pvmove pvresize pvscan
pvck pvdisplay pvremove pvs pv.sh
[root@jerrybj ~]# pvcreate /dev/sdb1
Physical volume"/dev/sdb1" successfully created
然后创建vg
[root@jerrybj ~]# vg
vgcfgbackup vgconvert vgextend vgmknodes vgs
vgcfgrestore vgcreate vgimport vgreduce vgscan
vgchange vgdisplay vgimportclone vgremove vgsplit
vgck vgexport vgmerge vgrename
[root@jerrybj ~]# vgcreate datavg /dev/sdb1
Volume group"datavg" successfully created
创建lv
[root@jerrybj ~]# lv
lvchange lvdisplay lvmchange lvmsadc lvreduce lvresize
lvconvert lvextend lvmdiskscan lvmsar lvremove lvs
lvcreate lvm lvmdump lvm.static lvrename lvscan
[root@jerrybj ~]# lvcreate -n lv_data1 -L 15g datavg
Logical volume"lv_data1" created
[root@jerrybj ~]# lvcreate -n lv_dsk1 -L 4g datavg
Logical volume"lv_dsk1" created
[root@jerrybj ~]# lvcreate -n lv_dsk2 -L 4g datavg
Logical volume"lv_dsk2" created
[root@jerrybj ~]# lvcreate -n lv_dsk3 -L 4g datavg
Logical volume"lv_dsk3" created
[root@jerrybj ~]# lvcreate -n lv_dsk4 -L 4g datavg
Logical volume"lv_dsk4" created
接下来格式化：
[root@jerrybj ~]# mkfs.ext3 /dev/datavg/lv_data1
[root@jerrybj ~]# mkfs.ext3 /dev/datavg/lv_dsk1
[root@jerrybj ~]# mkfs.ext3 /dev/datavg/lv_dsk2
[root@jerrybj ~]# mkfs.ext3 /dev/datavg/lv_dsk3
[root@jerrybj ~]# mkfs.ext3 /dev/datavg/lv_dsk4
下面创建目录：
[root@jerrybj ~]# mkdir /u01 /dsk1 /dsk2 /dsk3 /dsk4
下面开机挂载：
[root@jerrybj ~]# vi /etc/fstab
末尾添加如下内容：
/dev/datavg/lv_data1 /u01 ext3 defaults 0 0
/dev/datavg/lv_dsk1 /dsk1 ext3 defaults 0 0
/dev/datavg/lv_dsk2 /dsk2 ext3 defaults 0 0
/dev/datavg/lv_dsk3 /dsk3 ext3 defaults 0 0
/dev/datavg/lv_dsk4 /dsk4 ext3 defaults 0 0
[root@jerrybj ~]# mount /u01
[root@jerrybj ~]# mount /dsk1
[root@jerrybj ~]# mount /dsk2
[root@jerrybj ~]# mount /dsk3
[root@jerrybj ~]# mount /dsk4
大功告成！