擴展硬盤
對硬盤進行分區
(1) 查看現有的硬盤分區情況 [mysql@china ~]$ df -h Filesystem Size Used Avail Use% Mounted on /dev/mapper/vg_china-lv_root 18G 5.2G 12G 32% / tmpfs 931M 72K 931M 1% /dev/shm /dev/sda1 485M 39M 421M 9% /boot (2).對新增的硬盤空間做新增分區（硬盤數沒有增加，增加的是空間） sudo fdisk /dev/sda 出現如下提示：Command (m for help): n 說明：新增分區 繼續提示：Command action e extended p primary partition (1-4) p 說明：打印分區表 3 說明：Partition number (1-4):此時fdisk會讓你選擇主分區的編號，如果已經有了主分區sda1，sda2，那么編號就選3，即要創建的該分區為sda3. First cylinder (2611-16632, default 2611): 默認回車（最小） Using default value 2611 Last cylinder or +size or +sizeM or +sizeK (2611-16632, default 16632):默認回車（最大） Using default value 16632 Command (m for help): t 說明：修改分區類型 Partition number (1-4): 3 說明：修改分區類型對應的分區號 Hex code (type L to list codes): 8e說明：8e是lvm磁盤類型 Changed system type of partition 3 to 8e (Linux LVM) Command (m for help): p 說明：打印分區表 Command (m for help): w 說明：保存退出 The partition table has been altered! (3)重新啟動系統 reboot (4) 輸入一下命令 sudo fdisk -l /dev/sda (5).執行 sudo pvcreate /dev/sda3 為這個新分區創建一個物理卷Volume； (6).現在要做的是把物理卷(volume)擴展到新的物理卷上，先執行命令 sudo vgdisplay 來查看已有的系統Volume Group的情況，輸出如下： [root@china ~]# vgdisplay --- Volume group --- VG Name vg_china 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 19.51 GiB PE Size 4.00 MiB Total PE 4994 Alloc PE / Size 4994 / 19.51 GiB Free PE / Size 0 / 0 VG UUID SCI2oR-nhr6-89fG-AfDW-CzsM-HxqL-QpS3jr （7）執行命令 vgextend vg_china /dev/sda3 ， 擴展以后的Volume Group到新的物理磁盤卷Volume上。 （8）下一步是擴展邏輯卷(Logic Volume)到新的卷上，先用命令 vgdisplay 看看目前已有的邏輯卷(Logic Volume)的情況 [root@china ~]# vgdisplay --- Volume group --- VG Name vg_china System ID Format lvm2 Metadata Areas 2 Metadata Sequence No 4 VG Access read/write VG Status resizable MAX LV 0 Cur LV 2 Open LV 2 Max PV 0 Cur PV 2 Act PV 2 VG Size 99.50 GiB PE Size 4.00 MiB Total PE 25473 Alloc PE / Size 4994 / 19.51 GiB Free PE / Size 20479 / 80.00 GiB VG UUID SCI2oR-nhr6-89fG-AfDW-CzsM-HxqL-QpS3jr (9)執行命令 擴展邏輯分區 [root@china ~]# lvextend -L +79.99G /dev/vg_china/lv_root /dev/sda3 Rounding size to boundary between physical extents: 79.99 GiB Extending logical volume lv_root to 97.50 GiB Logical volume lv_root successfully resized (10)最后將文件系統resize到新的邏輯卷上來，執行命令 [root@china ~]# resize2fs /dev/vg_china/lv_root resize2fs 1.41.12 (17-May-2010) Filesystem at /dev/vg_china/lv_root is mounted on /; on-line resizing required old desc_blocks = 2, new_desc_blocks = 7 Performing an on-line resize of /dev/vg_china/lv_root to 25559040 (4k) blocks. The filesystem on /dev/vg_china/lv_root is now 25559040 blocks long. (11)用命令看到擴展的分區 [root@china ~]# fdisk -l /dev/sda Disk /dev/sda: 107.4 GB, 107374182400 bytes 255 heads, 63 sectors/track, 13054 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x0007243f Device Boot Start End Blocks Id System /dev/sda1 * 1 64 512000 83 Linux Partition 1 does not end on cylinder boundary. /dev/sda2 64 2611 20458496 8e Linux LVM /dev/sda3 2611 13054 83884735 8e Linux LVM [root@china ~]# df -hl Filesystem Size Used Avail Use% Mounted on /dev/mapper/vg_china-lv_root 96G 5.2G 86G 6% / tmpfs 931M 72K 931M 1% /dev/shm /dev/sda1 485M 39M 421M 9% /boot