使用partprobe命令重新读取分区表

[root@jetsen /]# pvcreate /dev/sdc3
  Device /dev/sdc3 not found (or ignored by filtering).

[root@jetsen /]# dd if=/dev/urandom of=/dev/sdc3 bs=512 count=64
64+0 records in
64+0 records out
32768 bytes (33 kB) copied, 0.0228513 seconds, 1.4 MB/s

[root@jetsen /]# pvcreate /dev/sdc3

执行成功。