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由于之前分的lv太大所以想缩小一些 腾出点空间给其它用 要减小lvm的文件系统 需要文件系统在umount状态下修改 所以在线不要去改重要文件系统 操作步骤如下： 1.查看挂载的文件系统和lv df -h 查看文件系统 ，下面是我要更改的文件系统。这里是99G /dev/mapper/vg_LogVol01 99G 188M 94G 1% /home lvdisplay 下面是文件系统对应的逻辑卷（lv） --- Logical volume --- LV Name /dev/vg_test/LogVol01 VG Name vg_test LV UUID cXylir-3KNW-UQ8a-kXos-fuIy-NAx2-0DJ5Fw LV Write Access read/write LV Status available # open 1 LV Size 100.00 GiB Current LE 800 Segments 1 Allocation inherit Read ahead sectors auto - currently set to 256 Block device 253:2 2. 卸载文件系统 umount /dev/mapper/vg_LogVol01 3. 查看是否卸载 df -h 文件系统已经没有了 4.文件系统检查 确认没有坏块 e2fsck -f /dev/mapper/vg_LogVol01 e2fsck 1.41.12 (17-May-2010) Pass 1: Checking inodes, blocks, and sizes Pass 2: Checking directory structure Pass 3: Checking directory connectivity Pass 4: Checking reference counts Pass 5: Checking group summary information /dev/mapper/vg_LogVol01: 11/6553600 files (0.0% non-contiguous), 459 349/26214400 blocks 5.缩小文件系统 到20g resize2fs /dev/mapper/vg_LogVol01 20G resize2fs 1.41.12 (17-May-2010) Resizing the filesystem on /dev/mapper/vg_LogVol01 to 5242880 (4k) b locks. The filesystem on /dev/mapper/vg_LogVol01 is now 5242880 blocks long 6.缩小逻辑卷 lvreduce -L 20G /dev/vg_test/LogVol01 WARNING: Reducing active logical volume to 20.00 GiB THIS MAY DESTROY YOUR DATA (filesystem etc.) Do you really want to reduce LogVol01? [y/n]: y Reducing logical volume LogVol01 to 20.00 GiB Logical volume LogVol01 successfully resized 7.挂载上文件系统 mount /dev/mapper/vg_LogVol01 8.通过df -h 和lvdisplay来查看是否已经修改 (责任编辑：IT) |