这样，只能通过重新格式化这个分区，格式化后才能再次挂载到home下
| [root@localhost ~]# mkfs.xfs /dev/mapper/centos-home -f meta-data=/dev/mapper/centos-home isize=512 agcount=4, agsize=41156608 blks = sectsz=512 attr=2, projid32bit=1 = crc=1 finobt=0, sparse=0 data = bsize=4096 blocks=164626432, imaxpct=25 = sunit=0 swidth=0 blks naming =version 2 bsize=4096 ascii-ci=0 ftype=1 log =internal log bsize=4096 blocks=80384, version=2 = sectsz=512 sunit=0 blks, lazy-count=1 realtime =none extsz=4096 blocks=0, rtextents=0 [root@localhost ~]# mount /dev/mapper/centos-home /home/ |
再次查看分区，发现home分区已经减小了100G,只不过这个分区里之前的数据都没有了。
| [root@localhost ~]# df -hT 文件系统 类型 容量 已用 可用 已用% 挂载点 /dev/mapper/centos-root xfs 205G 2.2G 203G 2% / devtmpfs devtmpfs 32G 0 32G 0% /dev tmpfs tmpfs 32G 0 32G 0% /dev/shm tmpfs tmpfs 32G 49M 32G 1% /run tmpfs tmpfs 32G 0 32G 0% /sys/fs/cgroup /dev/sda1 xfs 197M 139M 59M 71% /boot tmpfs tmpfs 6.3G 0 6.3G 0% /run/user/0 /dev/mapper/centos-home xfs 618G 73M 578G 1% /home |
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上面在重新格式的时候，也可以将这个格式化为ext4格式。
| [root@localhost ~]# mkfs.ext4 /dev/mapper/centos-home [root@localhost ~]# cat /etc/fstab //将home分区的开机挂载设置里的xfs改为ext4 |
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然后将上面从home分区拿出的100G放到／分区下
| [root@localhost ~]# vgdisplay --- Volume group --- VG Name centos System ID Format lvm2 Metadata Areas 1 Metadata Sequence No 9 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 930.80 GiB PE Size 4.00 MiB Total PE 238285 Alloc PE / Size 211456 / 826.00 GiB Free PE / Size 26829 / 104.80 GiB VG UUID a5hiAh-LB8M-9lRv-Ps1a-z35L-J4fk-sP3KrF [root@localhost ~]# lvextend -L +100G /dev/mapper/centos-root Size of logical volume centos/root changed from 205.00 GiB (52480 extents) to 305.00 GiB (78080 extents). Logical volume centos/root successfully resized. [root@localhost ~]# xfs_growfs /dev/mapper/centos-root meta-data=/dev/mapper/centos-root isize=256 agcount=5, agsize=13107200 blks = sectsz=512 attr=2, projid32bit=1 = crc=0 finobt=0 spinodes=0 data = bsize=4096 blocks=53739520, imaxpct=25 = sunit=0 swidth=0 blks naming =version 2 bsize=4096 ascii-ci=0 ftype=0 log =internal bsize=4096 blocks=25600, version=2 = sectsz=512 sunit=0 blks, lazy-count=1 realtime =none extsz=4096 blocks=0, rtextents=0 data blocks changed from 53739520 to 79953920 [root@localhost ~]# df -hT 文件系统 类型 容量 已用 可用 已用% 挂载点 /dev/mapper/centos-root xfs 305G 2.2G 203G 2% / devtmpfs devtmpfs 32G 0 32G 0% /dev tmpfs tmpfs 32G 0 32G 0% /dev/shm tmpfs tmpfs 32G 49M 32G 1% /run tmpfs tmpfs 32G 0 32G 0% /sys/fs/cgroup /dev/sda1 xfs 197M 139M 59M 71% /boot tmpfs tmpfs 6.3G 0 6.3G 0% /run/user/0 /dev/mapper/centos-home xfs 618G 73M 578G 1% /hom |
