pvresize命令来自英文词组“Physical Volume resize”的缩写，其功能是用于调整LVM中物理卷的容量大小。pvresize命令可以调整已在卷组中的物理卷容量大小，一般要在物理卷设备扩容或缩小容量前进行此操作，提前告知操作系统和LVM逻辑卷管理器新的物理卷大小，若要缩小物理卷容量，不得低于已使用的容量。

语法格式：pvresize [参数] 物理卷名

常用参数：

参考实例

同步物理卷的容量为最新大小：

[root@linuxcool ~]# pvresize /dev/sda2Physical volume "/dev/sda2" changed1 physical volume(s) resized or updated / 0 physical volume(s) not resized

调整物理卷的容量大小为20GB（需二次确认）：

[root@linuxcool ~]# pvresize --setphysicalvolumesize 20G /dev/sda2WARNING: /dev/sda2: Overriding real size <19.00 GiB. You could lose data./dev/sda2: Requested size 20.00 GiB exceeds real size <19.00 GiB. Proceed?  [y/n]: yWARNING: /dev/sda2: Pretending size is 41943040 not 39843840 sectors.Physical volume "/dev/sda2" changed1 physical volume(s) resized or updated / 0 physical volume(s) not resized

以测试模式运行，同步物理卷容量为最新大小：

[root@linuxcool ~]# pvresize -t /dev/sda2TEST MODE: Metadata will NOT be updated and volumes will not be (de)activated.WARNING: Device /dev/sda2 has size of 39843840 sectors which is smaller than corresponding PV size of 41940992 sectors. Was device resized?One or more devices used as PVs in VG rhel_linuxprobe have changed sizes.Physical volume "/dev/sda2" changed1 physical volume(s) resized or updated / 0 physical volume(s) not resized

与该功能相关的Linux命令：