pvresize命令来自于英文词组”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
常用参数:
-d | 调试模式 |
-h | 帮助信息 |
-t | 以测试模式运行 |
-v | 制定发送消息的详细等级 |
-y | 无需二次确认 |
-- reportformat basic|json | 重写当前报告的输出格式 |
-- setphysicalvolumesize<卷大小> | 覆盖物理卷自动检测到的尺寸 |
参考实例
同步物理卷的容量为最新大小:
[root@linuxcool ~]# pvresize /dev/sda2 Physical volume "/dev/sda2" changed 1 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/sda2 WARNING: /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]: y WARNING: /dev/sda2: Pretending size is 41943040 not 39843840 sectors. Physical volume "/dev/sda2" changed 1 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/sda2 TEST 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" changed 1 physical volume(s) resized or updated / 0 physical volume(s) not resized