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CentOS6.5 linux 邏輯卷管理 調(diào)整分區(qū)大?。?dev/mapper/VolGroup

http://blog.51yip.com/linux/1699.html


[root@localhost ~]# df -h  Filesystem Size Used Avail Use% Mounted on  /dev/mapper/VolGroup-lv_root 50G 47G 16M 100% /   //lv_root滿了  tmpfs 1.9G 72K 1.9G 1% /dev/shm  /dev/sda1 485M 40M 420M 9% /boot  /dev/mapper/VolGroup-lv_home 406G 19G 366G 5% /home   //lv_home空間很多    [root@localhost ~]# resize2fs -p /dev/mapper/VolGroup-lv_home 100G  resize2fs 1.41.12 (17-May-2010)  Filesystem at /dev/mapper/VolGroup-lv_home is mounted on /home; on-line resizing required  On-line shrinking from 107865088 to 65536000 not supported.    //先umount才能resize2fs    [root@localhost ~]# umount /home   //umount home目錄    [root@localhost ~]# resize2fs -p /dev/mapper/VolGroup-lv_home 100G  resize2fs 1.41.12 (17-May-2010)  請先運行 'e2fsck -f /dev/mapper/VolGroup-lv_home'.   //提示要先進行磁盤檢測    [root@localhost ~]# e2fsck -f /dev/mapper/VolGroup-lv_home  e2fsck 1.41.12 (17-May-2010)  第一步: 檢查inode,塊,和大小  第二步: 檢查目錄結(jié)構(gòu)  第3步: 檢查目錄連接性  Pass 4: Checking reference counts  第5步: 檢查簇概要信息  /dev/mapper/VolGroup-lv_home: 1459/16384000 files (4.0% non-contiguous), 5914204/65536000 blocks    [root@localhost ~]# resize2fs -p /dev/mapper/VolGroup-lv_home 100G    //重定大小  resize2fs 1.41.12 (17-May-2010)  Resizing the filesystem on /dev/mapper/VolGroup-lv_home to 26214400 (4k) blocks.  Begin pass 2 (max = 32768)  正在重定位塊 XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX  Begin pass 3 (max = 2000)  正在掃描inode表 XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX  The filesystem on /dev/mapper/VolGroup-lv_home is now 26214400 blocks long.    [root@localhost ~]# mount /home/    [root@localhost ~]# df -h  Filesystem Size Used Avail Use% Mounted on  /dev/mapper/VolGroup-lv_root 50G 47G 16M 100% /  tmpfs 1.9G 72K 1.9G 1% /dev/shm  /dev/sda1 485M 40M 420M 9% /boot  /dev/mapper/VolGroup-lv_home 99G 19G 75G 20% /home    [root@localhost ~]# lvreduce -L 100G /dev/mapper/VolGroup-lv_home   //釋放空間   WARNING: Reducing active and open logical volume to 100.00 GiB   THIS MAY DESTROY YOUR DATA (filesystem etc.)  Do you really want to reduce lv_home? [y/n]: y   Reducing logical volume lv_home to 100.00 GiB   Logical volume lv_home successfully resized    [root@localhost ~]# df -h  Filesystem Size Used Avail Use% Mounted on  /dev/mapper/VolGroup-lv_root 50G 47G 16M 100% /  tmpfs 1.9G 72K 1.9G 1% /dev/shm  /dev/sda1 485M 40M 420M 9% /boot  /dev/mapper/VolGroup-lv_home 99G 19G 75G 20% /home    [root@localhost ~]# vgdisplay   --- Volume group ---   VG Name VolGroup   System ID   Format lvm2   Metadata Areas 1   Metadata Sequence No 5   VG Access read/write   VG Status resizable   MAX LV 0   Cur LV 3   Open LV 3   Max PV 0   Cur PV 1   Act PV 1   VG Size 465.27 GiB   PE Size 4.00 MiB   Total PE 119109   Alloc PE / Size 39372 / 153.80 GiB   Free PE / Size 79737 / 311.47 GiB       //空閑空間   VG UUID Vt2V4t-Byxs-tQqk-cY0h-IDE3-pabX-LUfkRS    [root@localhost ~]# lvextend -L +311.47G /dev/mapper/VolGroup-lv_root   //空閑空間加入到lv_root   Rounding size to boundary between physical extents: 311.47 GiB   Extending logical volume lv_root to 361.47 GiB   Logical volume lv_root successfully resized    [root@localhost ~]# resize2fs -p /dev/mapper/VolGroup-lv_root  resize2fs 1.41.12 (17-May-2010)  Filesystem at /dev/mapper/VolGroup-lv_root is mounted on /; on-line resizing required  old desc_blocks = 4, new_desc_blocks = 23    //這兒要耐心等待,擴大越多,時間越長  Performing an on-line resize of /dev/mapper/VolGroup-lv_root to 94757888 (4k) blocks.  The filesystem on /dev/mapper/VolGroup-lv_root is now 94757888 blocks long.    [root@localhost openfire]# df -h  Filesystem Size Used Avail Use% Mounted on  /dev/mapper/VolGroup-lv_root 356G 48G 308G 14% /  tmpfs 1.9G 72K 1.9G 1% /dev/shm  /dev/sda1 485M 40M 420M 9% /boot  /dev/mapper/VolGroup-lv_home 99G 19G 75G 20% /home 


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