1、首先通过fdisk -l查看当前存在的物理磁盘

[root@rac1 work]# 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: 536 MB, 536870912 bytes 64 heads, 32 sectors/track, 512 cylinders Units = cylinders of 2048 * 512 = 1048576 bytes Disk /dev/sdb doesn't contain a valid partition table Disk /dev/sdc: 536 MB, 536870912 bytes 64 heads, 32 sectors/track, 512 cylinders Units = cylinders of 2048 * 512 = 1048576 bytes Disk /dev/sdc doesn't contain a valid partition table 2、使用pvcreate创建PV物理分区（可以pvcreate /dev/sdb /dev/sdd同时创建多个PV） [root@rac1 work]# pvcreate /dev/sdd   Physical volume "/dev/sdd" successfully created 3、PV创建成功，可以是用pvscan和pvdisplay进行查询当前PV状况 [root@rac1 work]# pvscan   PV /dev/sdb    VG vg01         lvm2 [508.00 MB / 8.00 MB free]   PV /dev/sdc    VG vg01         lvm2 [508.00 MB / 508.00 MB free]   PV /dev/sdd    VG vg01         lvm2 [508.00 MB / 508.00 MB free]   PV /dev/sda2   VG VolGroup00   lvm2 [19.88 GB / 0    free]   PV /dev/sde                    lvm2 [512.00 MB]   PV /dev/sdf                    lvm2 [512.00 MB]   Total: 6 [22.36 GB] / in use: 4 [21.36 GB] / in no VG: 2 [1.00 GB] 4、通过vgscan和vgdisplay查询当前VG信息 [root@rac1 work]# vgscan   Reading all physical volumes.  This may take a while...   Found volume group "vg01" using metadata type lvm2   Found volume group "VolGroup00" using metadata type lvm2 [root@rac1 work]# vgdisplay   --- Volume group ---   VG Name               vg01   System ID               Format                lvm2   Metadata Areas        3   Metadata Sequence No  4   VG Access             read/write   VG Status             resizable   MAX LV                0   Cur LV                1   Open LV               1   Max PV                0   Cur PV                3   Act PV                3   VG Size               1.49 GB   PE Size               4.00 MB   Total PE              381   Alloc PE / Size       125 / 500.00 MB   Free  PE / Size       256 / 1.00 GB   VG UUID               tBqgwY-7PdL-I1B0-JsXP-240U-MMN0-zviktm 5、使用vgcreate创建卷组 [root@rac1 work]#vgcreate vg1 /dev/sdb                 #vgcreate vg2 /dev/sdc                 #vgscan                 #vgdisplay 6、vgextend扩充卷组 [root@rac1 work]# vgextend vg01 /dev/sde   Volume group "vg01" successfully extended [root@rac1 work]# pvscan   PV /dev/sdb    VG vg01         lvm2 [508.00 MB / 8.00 MB free]   PV /dev/sdc    VG vg01         lvm2 [508.00 MB / 508.00 MB free]   PV /dev/sdd    VG vg01         lvm2 [508.00 MB / 508.00 MB free]   PV /dev/sde    VG vg01         lvm2 [508.00 MB / 508.00 MB free]   PV /dev/sdf    VG vg01         lvm2 [508.00 MB / 508.00 MB free]   PV /dev/sda2   VG VolGroup00   lvm2 [19.88 GB / 0    free]   Total: 6 [22.36 GB] / in use: 6 [22.36 GB] / in no VG: 0 [0   ] 7、lvcreate创建逻辑卷（分别创建work和study两个逻辑卷）     #lvcreate -L 1200M -n oracle  oravg     #lvcreate -L 500M -n study vg2     #lvscan     #lvdisplay  --- Logical volume ---   LV Name                /dev/vg2/study   VG Name                vg2   LV UUID                53VT9v-dyp0-lSST-eDFz-w2Ns-Os0Z-ERnqVU   LV Write Access        read/write   LV Status              available   # open                 0   LV Size            500.00 MB   Current LE         125   Segments               1   Allocation             inherit   Read ahead sectors     auto   - currently set to     256   Block device           253:1 8、lvextend增加减少LV大小 [root@rac1 work]# lvextend -L +100M /dev/vg01/lv11   Extending logical volume lv11 to 800.00 MB   Logical volume lv11 successfully resized 9、 删除逻辑卷-卷组-物理卷 (必需按照先后顺序来执行删除) #lvremove /dev/vg0/vg1 删除逻辑卷 a、先卸载目录挂载 umount 使用lvchange -a n /dev/vg01/lv11更改lv在线状态 [root@rac1 ~]# lvscan   ACTIVE   Original '/dev/vg01/lv11' [800.00 MB] inherit   ACTIVE   Snapshot '/dev/vg01/kuaizhao' [12.00 MB] inherit   ACTIVE            '/dev/VolGroup00/LogVol00' [17.94 GB] inherit   ACTIVE            '/dev/VolGroup00/LogVol01' [1.94 GB] inherit [root@rac1 ~]# lvchange -a n /dev/vg01/lv11 [root@rac1 ~]# lvscan   inactive Original '/dev/vg01/lv11' [800.00 MB] inherit   inactive Snapshot '/dev/vg01/kuaizhao' [12.00 MB] inherit   ACTIVE            '/dev/VolGroup00/LogVol00' [17.94 GB] inherit   ACTIVE            '/dev/VolGroup00/LogVol01' [1.94 GB] inherit b、如果删除不了，要先确认是否已经做过快照（snapshot），先删除快照 #vgremove /dev/vg0 删除卷组 这里有一个问题,如果建立的卷组是活动的,他就不能删除 这里需要使用一个命令来是他变成固定的,以便删除 #vgchage -a n /dev/vg0 -a 参数指定卷组是否是活动的,n表示固定,y表示活动 #vgremove /dev/vg0  成功 物理卷的删除,移除/etc下的lvmconf 和lvmtab的两个文件,然后将分区转换为linux的就可以了 10、 分区格式化 #mkfs.ext3 /dev/vg1/work         //或 #mkfs -j /dev/vg1/work #mkfs.ext3 /dev/vg2/study        //... #df–l Disk /dev/hda:8589 MB,8589934592 bytes 255 heads,63 sectors/track,1044 cylinders Units=cylindersof16065*512=8225280 bytes     Device Boot Start End  Blocks   Id System /dev/hda1*    1    32   257008+  83  Linux /dev/hda2     33    97   522112+  83  Linux /dev/hda3     98    358  2096482+83  Linux /dev/hda4     359   1044 5510295  5  Extended /dev/hda5     359   549  1534176  83  Linux /dev/hda6     550   848  2401686  83  Linux /dev/hda7     849   913  522081   82  Linux swap / Solaris /dev/hda8     914   978  522081   83  Linux /dev/hda9     979   1043 522081   83  Linux 11、挂载新分区 #mkdir../home/work../home/study #mount../dev/vg1/work../home/work #mount../dev/vg2/study../home/study #df–Th Filesystem  Type SizeUsed Avail Use% Mounted on /dev/hda2   ext3 494M 212M 257M  46%   / /dev/hda9   ext3 494M 45M 425M   10%   /var /dev/hda8   ext3 494M 11M 458M   3%    /opt /dev/hda6   ext3 2.3G 68M 2.1G   4%    /home /dev/hda3   ext3 2.0G 1.7G 182M  91%   /usr /dev/hda5   ext3 1.5G 35M 1.4G   3%    /usr/local /dev/hda1   ext3 244M 12M 219M   6%    /boot tmpfs       tmpfs 125M 0  125M   0%    /dev/shm /dev/mapper/vg1-work             ext3  485M 11M 449M  3%    /home/work /dev/mapper/vg2-study             ext3  485M 11M 449M  3%    /home/study