红帽全球峰会5.2.2. 显示物理卷
用来显示 LVM 物理卷属性的命令有三个：
pvs、pvdisplay 和 pvscan。
The
pvs command provides physical volume information in a configurable form, displaying one line per physical volume. The pvs command provides a great deal of format control, and is useful for scripting. For information on using the pvs command to customize your output, see 第 5.8 节 “为 LVM 自定义报告”.
The
pvdisplay command provides a verbose multi-line output for each physical volume. It displays physical properties (size, extents, volume group, and so on) in a fixed format.
以下是
pvdisplay 为单一物理卷显示的输出结果示例。
# pvdisplay
--- Physical volume ---
PV Name /dev/sdc1
VG Name new_vg
PV Size 17.14 GB / not usable 3.40 MB
Allocatable yes
PE Size (KByte) 4096
Total PE 4388
Free PE 4375
Allocated PE 13
PV UUID Joqlch-yWSj-kuEn-IdwM-01S9-XO8M-mcpsVe
pvscan 命令在系统中为物理卷扫描所有支持的 LVM 块设备。
以下命令显示所有找到的物理设备：
# pvscan
PV /dev/sdb2 VG vg0 lvm2 [964.00 MB / 0 free]
PV /dev/sdc1 VG vg0 lvm2 [964.00 MB / 428.00 MB free]
PV /dev/sdc2 lvm2 [964.84 MB]
Total: 3 [2.83 GB] / in use: 2 [1.88 GB] / in no VG: 1 [964.84 MB]
You can define a filter in the
/etc/lvm/lvm.conf file so that this command will avoid scanning specific physical volumes. For information on using filters to control which devices are scanned, see 第 5.5 节 “用过滤器控制 LVM 设备扫描”.
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