142 lines
1.8 KiB
Markdown
Executable File
142 lines
1.8 KiB
Markdown
Executable File
# CentOS 调整分区大小
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> 将 /home 分区空间调整到 /root 分区
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---
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## 1. 查看当前分区
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```bash
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df -h
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```
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```bash
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vgdisplay
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```
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查看空闲磁盘大小（`Free PE / Size`）
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---
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## 2. 备份 home 分区
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```bash
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tar cvf /tmp/home.tar /home
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```
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---
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## 3. 卸载 /home
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如果无法卸载，先终止使用 /home 的进程：
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```bash
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fuser -km /home/
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umount /home
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```
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---
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## 4. 删除 home 所在的 LV
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```bash
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lvremove /dev/mapper/centos-home
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```
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> ⚠️ 确认已备份！
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---
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## 5. 扩展 root 所在的 LV
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```bash
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# 扩展 50GB（根据实际空闲空间调整）
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lvextend -L +50G /dev/mapper/centos-root
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```
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---
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## 6. 扩展 root 文件系统
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```bash
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# XFS 文件系统
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xfs_growfs /dev/mapper/centos-root
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# 如果是 ext4：
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# resize2fs /dev/mapper/centos-root
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```
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---
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## 7. 重新创建 home LV
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```bash
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# 创建 50GB 的 home（根据实际需求调整）
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lvcreate -L 50G -n /dev/mapper/centos-home
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```
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---
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## 8. 创建文件系统
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```bash
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mkfs.xfs /dev/mapper/centos-home
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```
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---
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## 9. 挂载 home
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```bash
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mount /dev/mapper/centos-home
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```
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---
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## 10. 恢复 home 文件
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```bash
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tar xvf /tmp/home.tar -C /home/
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```
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---
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## 完整流程
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```bash
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# 1. 备份
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tar cvf /tmp/home.tar /home
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# 2. 卸载
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umount /home
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# 或强制终止
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fuser -km /home/
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# 3. 删除旧 LV
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lvremove /dev/mapper/centos-home
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# 4. 扩展 root LV
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lvextend -L +50G /dev/mapper/centos-root
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# 5. 扩展文件系统
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xfs_growfs /dev/mapper/centos-root
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# 6. 创建新 home LV
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lvcreate -L 50G -n /dev/mapper/centos-home
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# 7. 创建文件系统
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mkfs.xfs /dev/mapper/centos-home
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# 8. 挂载
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mount /dev/mapper/centos-home
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# 9. 恢复
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tar xvf /tmp/home.tar -C /home/
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```
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---
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> ⚠️ **操作前务必备份数据！**
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> 参考：[CentOS 分区调整](https://www.jianshu.com/p/27c87f390175)
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