linux 邏輯卷管理 調整分區大小
阿新 • • 發佈：2017-09-12
host real rmi this 運行 linux 邏輯卷 meta 4.0 resize
測試機各種報錯，創建個目錄都報錯，df看了一下，發現VolGroup-lv_root 100%，虛擬磁盤滿了，怎麽辦呢
1，解決過程
# df -h //查看分區 # umount /home //取消掛載 # e2fsck -f /dev/mapper/VolGroup-lv_home //分區檢測 # resize2fs -p /dev/mapper/VolGroup-lv_home 100G //將lv_home虛擬分區設為100G # mount /home //掛載home # df -h //查看分區 # lvreduce -L 100G /dev/mapper/VolGroup-lv_home //釋放空間 # vgdisplay //查看可用空間大小 # lvextend -L +311.47G /dev/mapper/VolGroup-lv_root //擴展lv_root虛擬分區 # resize2fs -p /dev/mapper/VolGroup-lv_root //lv_root重設分區大小
LVM（邏輯磁盤管理），靈活性很高.
2，詳細解決過程
[[email protected] ~]# 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 [[email protected] ~]# 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 [[email protected] ~]# umount /home //umount home目錄 [[email protected] ~]# 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 [[email protected] ~]# 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: 檢查目錄結構 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 [[email protected] ~]# 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. [[email protected] ~]# mount /home/ [[email protected] ~]# 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 [[email protected] ~]# 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 [[email protected] ~]# 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 [[email protected] ~]# 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 [[email protected] ~]# 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 [[email protected] ~]# 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. [[email protected] 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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作者:海底蒼鷹
地址:http://blog.51yip.com/linux/1699.html
linux 邏輯卷管理 調整分區大小