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LVM调整分区大小
source link: https://bajie.dev/posts/20240124-lvm_resize/
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LVM调整分区大小
2024-01-24
1 分钟阅读
系统是xfs文件格式。/root空间不够了。必须对空间进行调整，悲剧的是xfs只能增加空间，不能缩减空间，必须曲线救国了。
查看一下，缺省有两个lvm的分区
/dev/mapper/centos-root 40G
/dev/mapper/centos-home 20G
只能减小home分区，再增大root分区了。
先备份home分区，并缩小到2G：
# yum -y install xfsdump
# xfsdump -f /home.xfsdump /home
please enter label for this dump session (timeout in 300 sec)
-> home
please enter label for media in drive 0 (timeout in 300 sec)
-> home
# umount /home
# lvreduce -L 2G /dev/mapper/centos-home
Do you really want to reduce home? [y/n]: y
然后扩充root分区：
# lvextend -L +18G /dev/mapper/centos-root
# xfs_growfs /dev/mapper/centos-root
最后恢复home分区
# mkfs.xfs -f /dev/mapper/centos-home
# mount /home
# xfsrestore -f /home.xfsdump /home
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