lvextend 扩容后， df -h 看到的却还是原来的大小

最新推荐文章于 2025-08-04 07:00:00 发布

转载最新推荐文章于 2025-08-04 07:00:00 发布 · 4.9k 阅读

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原文链接：http://www.cnblogs.com/dbseeker/p/6369777.html

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#运维

本文介绍了如何使用lvextend命令扩展逻辑卷(lv)，并利用resize2fs命令调整已挂载文件系统的大小，确保能够充分利用扩容后的存储空间。

[root@stb ~]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/vg_stb-lv_u01 9.9G 6.5G 3.0G 69% /u01

[root@stb ~]# pvcreate /dev/sdc1
dev_is_mpath: failed to get device for 8:33
Physical volume "/dev/sdc1" successfully created

[root@stb ~]# vgextend vg_stb /dev/sdc1
Volume group "vg_stb" successfully extended

[root@stb ~]# lvextend -l +100%FREE /dev/vg_stb/lv_u01
Extending logical volume lv_u01 to 14.99 GiB
Logical volume lv_u01 successfully resized

[root@stb ~]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/vg_stb-lv_u01 9.9G 6.5G 3.0G 69% /u01

### lvextend扩展的是lv, df看到的是文件系统, 看来还需要扩展文件系统

[root@stb ~]# resize2fs -p -F /dev/mapper/vg_stb-lv_u01
resize2fs 1.41.12 (17-May-2010)
Filesystem at /dev/mapper/vg_stb-lv_u01 is mounted on /u01; on-line resizing required
old desc_blocks = 1, new_desc_blocks = 1
Performing an on-line resize of /dev/mapper/vg_stb-lv_u01 to 3930112 (4k) blocks.
The filesystem on /dev/mapper/vg_stb-lv_u01 is now 3930112 blocks long.

[root@stb ~]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/vg_stb-lv_u01 15G 6.5G 7.6G 46% /u01

转载于:https://www.cnblogs.com/dbseeker/p/6369777.html