[root@qing ~]# fdisk -l #查看磁盘信息
Disk /dev/sda: 42.9 GB, 42949672960 bytes255 heads, 63 sectors/track, 5221 cylindersUnits = cylinders of 16065 * 512 = 8225280 bytes Device Boot Start End Blocks Id System/dev/sda1 * 1 13 104391 83 Linux/dev/sda2 14 5221 41833260 8e Linux LVMDisk /dev/sdb: 5368 MB, 5368709120 bytes255 heads, 63 sectors/track, 652 cylindersUnits = cylinders of 16065 * 512 = 8225280 bytes Device Boot Start End Blocks Id System[root@qing ~]# [root@qing ~]# [root@qing ~]# [root@qing ~]# fdisk /dev/sdb #进入分区管理Command (m for help): n #创建新分区Command action e extended p primary partition (1-4)p #分区类型为主分区Partition number (1-4): 1First cylinder (1-652, default 1): Using default value 1Last cylinder or +size or +sizeM or +sizeK (1-652, default 652): +5368M #分区大小为5368MValue out of range.Last cylinder or +size or +sizeM or +sizeK (1-652, default 652): Using default value 652Command (m for help): p #查看分区信息Disk /dev/sdb: 5368 MB, 5368709120 bytes255 heads, 63 sectors/track, 652 cylindersUnits = cylinders of 16065 * 512 = 8225280 bytes Device Boot Start End Blocks Id System/dev/sdb1 1 652 5237158+ 83 LinuxCommand (m for help): t #修改分区类型Selected partition 1 #指定分区，26行中"Partition number (1-4): 1" 指定的分区Hex code (type L to list codes): 8e #类型为8e 为LVM类型 Changed system type of partition 1 to 8e (Linux LVM)Command (m for help): p Disk /dev/sdb: 5368 MB, 5368709120 bytes255 heads, 63 sectors/track, 652 cylindersUnits = cylinders of 16065 * 512 = 8225280 bytes Device Boot Start End Blocks Id System/dev/sdb1 1 652 5237158+ 8e Linux LVMCommand (m for help): w #写入分区标The partition table has been altered!Calling ioctl() to re-read partition table.WARNING: Re-reading the partition table failed with error 16: 设备或资源忙.The kernel still uses the old table.The new table will be used at the next reboot.Syncing disks.[root@qing ~]# [root@qing ~]# [root@qing ~]# [root@qing ~]# fdisk -lDisk /dev/sda: 42.9 GB, 42949672960 bytes255 heads, 63 sectors/track, 5221 cylindersUnits = cylinders of 16065 * 512 = 8225280 bytes Device Boot Start End Blocks Id System/dev/sda1 * 1 13 104391 83 Linux/dev/sda2 14 5221 41833260 8e Linux LVMDisk /dev/sdb: 5368 MB, 5368709120 bytes255 heads, 63 sectors/track, 652 cylindersUnits = cylinders of 16065 * 512 = 8225280 bytes Device Boot Start End Blocks Id System/dev/sdb1 1 652 5237158+ 8e Linux LVM #已经创建了一个LVM分区[root@qing ~]# [root@qing ~]# pvcreate /dev/sdb1 #使用pvcreate创建pv Writing physical volume data to disk "/dev/sdb1" Physical volume "/dev/sdb1" successfully created[root@qing ~]# [root@qing ~]# pvdisplay #查看已经存在的PV --- Physical volume --- PV Name /dev/sda2 VG Name VolGroup00 PV Size 39.90 GB / not usable 20.79 MB Allocatable yes (but full) PE Size (KByte) 32768 Total PE 1276 Free PE 0 Allocated PE 1276 PV UUID XUeOGK-U3Xu-I8AD-NdZn-tISP-G7iH-C9yRTI "/dev/sdb1" is a new physical volume of "4.99 GB" #刚创建的PV --- NEW Physical volume --- PV Name /dev/sdb1 VG Name PV Size 4.99 GB Allocatable NO PE Size (KByte) 0 Total PE 0 Free PE 0 Allocated PE 0 PV UUID RyVVY8-teMl-wHSq-oEcM-fEYu-axDK-pw7liR [root@qing ~]# [root@qing ~]# vgcreate volGroup00 /dev/sdb1 #创建VG ，可以使用VG名volGroup00或者使用新的，volGroup01 Volume group "volGroup00" successfully created[root@qing ~]# [root@qing ~]# vgdisplay #查看已经创建好的VG --- Volume group --- VG Name volGroup00 System ID Format lvm2 Metadata Areas 1 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 1 Act PV 1 VG Size 4.99 GB PE Size 4.00 MB Total PE 1278 Alloc PE / Size 0 / 0 Free PE / Size 1278 / 4.99 GB # 新创建的VG，可使用的容量为4.99G VG UUID pBeCkt-D5bU-avY6-0mkd-DgGd-BcX5-qvj6q0 --- Volume group --- VG Name VolGroup00 System ID Format lvm2 Metadata Areas 1 Metadata Sequence No 3 VG Access read/write VG Status resizable MAX LV 0 Cur LV 2 Open LV 2 Max PV 0 Cur PV 1 Act PV 1 VG Size 39.88 GB PE Size 32.00 MB Total PE 1276 Alloc PE / Size 1276 / 39.88 GB Free PE / Size 0 / 0 VG UUID 4WRogY-DsNe-ZtCq-gQKm-HmZX-UxwD-GxNwHA [root@qing ~]# [root@qing ~]# lvcreate -L 4.99G -n lvData2 volGroup00 #创建LV ，-L指定大小，-n指定LV名称 ，vo1Group00：表示从这个VG中划分LV Rounding up size to full physical extent 4.99 GB Logical volume "lvData2" created[root@qing ~]# [root@qing ~]# mkfs -t ext3 /dev/volGroup00/lvData2 #格式化LV，以便存储资料mke2fs 1.39 (29-May-2006)Filesystem label=OS type: LinuxBlock size=4096 (log=2)Fragment size=4096 (log=2)655360 inodes, 1308672 blocks65433 blocks (5.00%) reserved for the super userFirst data block=0Maximum filesystem blocks=134217728040 block groups32768 blocks per group, 32768 fragments per group16384 inodes per groupSuperblock backups stored on blocks: 32768, 98304, 163840, 229376, 294912, 819200, 884736Writing inode tables: done Creating journal (32768 blocks): doneWriting superblocks and filesystem accounting information: doneThis filesystem will be automatically checked every 25 mounts or180 days, whichever comes first. Use tune2fs -c or -i to override.[root@qing ~]#[root@qing ~]# df -h #挂载前磁盘信息文件系统 容量 已用 可用 已用% 挂载点/dev/mapper/VolGroup00-LogVol00 37G 6.0G 29G 18% //dev/sda1 99M 13M 81M 14% /boottmpfs 500M 0 500M 0% /dev/shm[root@qing ~]# [root@qing ~]# [root@qing ~]# mount /dev/volGroup00/lvData2 /boot #挂载LV[root@qing ~]# df -h #挂载后磁盘信息文件系统 容量 已用 可用 已用% 挂载点/dev/mapper/VolGroup00-LogVol00 37G 6.0G 29G 18% //dev/sda1 5.0G 139M 4.6G 3% /boottmpfs 500M 0 500M 0% /dev/shm/dev/mapper/volGroup00-lvData2 5.0G 139M 4.6G 3% /boot[root@qing ~]#[root@qing ~]# lvremove /dev/volGroup00/lvData2 #移除创建的LVDo you really want to remove active logical volume lvData2? [y/n]: y Logical volume "lvData2" successfully removed[root@qing ~]# vgremove /dev/volGroup00 #移除创建的VG Volume group "volGroup00" successfully removed[root@qing ~]# [root@qing ~]# blkid #查看所有分区的label以及UUID/dev/mapper/VolGroup00-LogVol01: TYPE="swap" /dev/mapper/VolGroup00-LogVol00: UUID="e24e83e0-9d0c-468a-9dae-93e2a0113ec2" TYPE="ext3" /dev/sda1: LABEL="/boot" UUID="9c46230d-c5f4-4039-9822-23ee1089f2f7" TYPE="ext3" /dev/hdc: LABEL="CentOS_5.8_Final" TYPE="iso9660" /dev/VolGroup00/LogVol00: UUID="e24e83e0-9d0c-468a-9dae-93e2a0113ec2" TYPE="ext3" /dev/VolGroup00/LogVol01: TYPE="swap" /dev/cdrw: LABEL="CentOS_5.8_Final" TYPE="iso9660" /dev/volGroup01/vlg01_1: UUID="e73b79aa-d95f-422a-b021-7c50ac402117" SEC_TYPE="ext2" TYPE="ext3" /dev/mapper/volGroup01-vlg01_1: UUID="e73b79aa-d95f-422a-b021-7c50ac402117" SEC_TYPE="ext2" TYPE="ext3" [root@qing ~]# [root@qing ~]# vi /etc/fstab #配置系统在启动的时候挂载LV/dev/VolGroup00/LogVol00 / ext3 defaults 1 1LABEL=/boot /boot ext3 defaults 1 2tmpfs /dev/shm tmpfs defaults 0 0devpts /dev/pts devpts gid=5,mode=620 0 0sysfs /sys sysfs defaults 0 0proc /proc proc defaults 0 0/dev/VolGroup00/LogVol01 swap swap defaults 0 0UUID=e73b79aa-d95f-422a-b021-7c50ac402117 /boot ext3 defaults 1 2