| 调整 home 分区来扩大 root 分区 | CentOS 7 | | --- | --- | 总体过程： 把/home内容备份，然后将/home文件系统所在的逻辑卷删除，扩大/root文件系统，新建/home ，恢复/home内容 1.查看分区 ``` df -h ``` 2.备份home分区文件 ``` tar cvf home.tar /home ``` 3.卸载/home，如果无法卸载，先终止使用/home文件系统的进程 ``` fuser -km /home/ umount /home ``` 4.删除/home所在的lv ``` lvremove /dev/mapper/centos-home ``` 5.扩展/root所在的lv，增加800G ``` lvextend -L +800G /dev/mapper/centos-root ``` 6.扩展/root文件系统 ``` xfs_growfs /dev/mapper/centos-root ``` 7.重新创建home lv ``` lvcreate -L 73G -n /dev/mapper/centos-home ``` 8. 创建文件系统 ``` mkfs.xfs /dev/mapper/centos-home ``` 9.挂载home ``` mount /dev/mapper/centos-home ``` 10.home文件恢复 ``` tar xvf home.tar -C /home/ cd /home/home/ mv * ../ ``` ------------------------------------------------------------------------- 如果想创建额外的lvm 1. 查看vg ``` # vgscan Reading volume groups from cache. Found volume group "centos" using metadata type lvm2 # vgdisplay --- Volume group --- VG Name centos System ID Format lvm2 Metadata Areas 1 Metadata Sequence No 7 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 <464.76 GiB PE Size 4.00 MiB Total PE 118978 Alloc PE / Size 39360 / 153.75 GiB Free PE / Size 79618 / <311.01 GiB VG UUID jKRX0T-8rz2-pRlV-ak5q-asSF-wT23-ldeCkV ``` 2. 创建lv ``` # lvcreate -l 79618 -n mhc_lv centos ``` -l指定小于等于上边的 Free PE ``` # lvdisplay ``` 3. 格式化 ``` # mkfs -t ext4 /dev/centos/mhc_lv ``` 4. 挂载 ``` # mkdir /data # mount /dev/centos/mhc_lv /data ```