转载自https://www.cnblogs.com/daynote/p/9747053.html
centos7默认情况下是创建不了pv的（原因待查证），解决方法如下：
默认：
[[email protected] ~]# pvcreate /dev/sdbDevice /dev/sdb excluded by a filter
解决：
[[email protected] ~]# dd if=/dev/urandom of=/dev/sdb bs=512 count=64
64+0 records in
64+0 records out
32768 bytes (33 kB) copied, 0.00760562 s, 4.3 MB/s
[[email protected] ~]# pvcreate /dev/sdb
Physical volume “/dev/sdb” successfully created.