linux磁盘管理子命令集中的partprobe与pvscan

分区检测命令partprobe

kelvin@:~$ sudo partprobe -s
/dev/vda: msdos partitions 1

与分区检测命令相关的命令有：

lvcreate命令 – 创建逻辑卷设备

pvscan命令 – 格式化输出物理卷信息报表 

testdisk命令 – 修复磁盘文件

swapon命令 – 激活交换分区

fdformat命令 – 对指定的软碟机装置进行低阶格式化

fio命令 – 对磁盘进行压力测试 

quotacheck命令 – 扫描获取磁盘信息 

pvremove命令 – 删除物理卷 

vgs命令 – 显示逻辑卷的卷组信息 

pvdisplay命令 – 显示物理卷属性

命令pvscan

由于pv*命令集默认未安装，需要分别用yum/apt添加到已安装软件中：

kelvin@:~$ sudo apt install lvm2
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following additional packages will be installed:
  dmeventd libdevmapper-event1.02.1 liblvm2app2.2 liblvm2cmd2.02 libreadline5
Suggested packages:
  thin-provisioning-tools
The following NEW packages will be installed:
  dmeventd libdevmapper-event1.02.1 liblvm2app2.2 liblvm2cmd2.02 libreadline5 lvm2

接下来运行pvscan找出所有的physical volumn:

kelvin@:~$ sudo pvscan --verbose
  /run/lvm/lvmetad.socket: connect failed: No such file or directory
  WARNING: Failed to connect to lvmetad. Falling back to internal scanning.
    Wiping cache of LVM-capable devices
    Wiping internal VG cache
    Using physical volume(s) on command line.
  No matching physical volumes found