Disk /dev/sdb: 2147 MB, 2147483648 bytes 255 heads, 63 sectors/track, 261 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System /dev/sdb1 1 13 104391 8e Linux LVM #看到Id是8e哦. /dev/sdb2 14 26 104422+ 8e Linux LVM /dev/sdb3 27 39 104422+ 8e Linux LVM
好得,下一步,建立物理卷PV
[root@localhost /]# pvcreate /dev/sdb1 /dev/sdb2 /dev/sdb3 Physical volume "/dev/sdb1" successfully created Physical volume "/dev/sdb2" successfully created Physical volume "/dev/sdb3" successfully created
创建VG卷组
[root@localhost /]# vgscan #一般我们初始建立卷组时都要先scan下. Reading all physical volumes. This may take a while... Couldn't find device with uuid '6T3gUb-fFdj-MMUL-wUTN-qdXG-8iEP-KsWbgb'. Couldn't find all physical volumes for volume group VolGroup00. Couldn't find device with uuid '6T3gUb-fFdj-MMUL-wUTN-qdXG-8iEP-KsWbgb'. Couldn't find all physical volumes for volume group VolGroup00. Volume group "VolGroup00" not found [root@localhost /]# vgcreate vg0 /dev/sdb1 /dev/sdb2 #建立卷组,名字叫:vg0 Volume group "vg0" successfully created [root@localhost /]# [root@localhost /]# vgdisplay vg0 # 查看下卷组vg0得情况 --- Volume group --- VG Name vg0 System ID Format lvm2 Metadata Areas 2 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 2 Act PV 2 VG Size 200.00 MB PE Size 4.00 MB #默认PE 都是4M, 通过 vgcreate -s 8M 可修改. Total PE 50 Alloc PE / Size 0 / 0 Free PE / Size 50 / 200.00 MB VG UUID WKRPJT-MI6G-vGk9-vne2-Gfg2-sAry-llsF7B 请输入内容
[root@localhost /]# lvcreate -n data -L 10M vg0 #建立名为data,大小10M /dev/cdrom: open failed: Read-only file system Rounding up size to full physical extent 12.00 MB Logical volume "data" created [root@localhost /]# lvdisplay #查看下逻辑卷情况 --- Logical volume --- LV Name /dev/vg0/data VG Name vg0 LV UUID qrC9H4-iHWi-Si4m-hN7G-x6Cm-yupr-aXRBVi LV Write Access read/write LV Status available # open 0 LV Size 12.00 MB #为什么是12M呢?我不是输入10M大小的吗? Current LE 3 就当是个问题考考大家了, Segments 1 Allocation inherit Read ahead sectors 0 Block device 253:2
Couldn't find device with uuid '6T3gUb-fFdj-MMUL-wUTN-qdXG-8iEP-KsWbgb'. Couldn't find all physical volumes for volume group VolGroup00. Couldn't find device with uuid '6T3gUb-fFdj-MMUL-wUTN-qdXG-8iEP-KsWbgb'. Couldn't find all physical volumes for volume group VolGroup00. Volume group "VolGroup00" not found [root@localhost /]# mkfs.ext3 /dev/vg0/data #格式化成ext3格式. mke2fs 1.35 (28-Feb-2004) Filesystem label= OS type: Linux Block size=1024 (log=0) Fragment size=1024 (log=0) 3072 inodes, 12288 blocks 614 blocks (5.00%) reserved for the super user First data block=1 Maximum filesystem blocks=12582912 2 block groups 8192 blocks per group, 8192 fragments per group 1536 inodes per group Superblock backups stored on blocks: 8193
This filesystem will be automatically checked every 35 mounts or 180 days, whichever comes first. Use tune2fs -c or -i to override. [root@localhost /]# mount /dev/vg0/data /mnt/ #mount到/mnt文件夹 [root@localhost /]# cp /etc/services /mnt/ #拷贝个文件进去试下 [root@localhost /]# ls /mnt/ #看下,里面已经有个services文件了.成功. lost+found services
[root@localhost /]# umount /mnt/ [root@localhost /]# lvextend -L +10M /dev/vg0/data #扩展逻辑卷大小 /dev/cdrom: open failed: Read-only file system Rounding up size to full physical extent 12.00 MB Extending logical volume data to 24.00 MB Logical volume data successfully resized
