linux-kernel - drbdadm 没有创建块设备

Question

我们正在通过安装在运行 kernel-3.10.0-862.el7 的 Centos-7.4 中的 DRBD 构建主动-被动集群。使用 drbadm 创建集群时无法创建卷并给出以下错误。你能帮帮我吗？

open(/dev/vdb) failed: Invalid argument
could not open with O_DIRECT, retrying without
'/dev/vdb' is not a block device!
open(/dev/vdb) failed: Invalid argument
could not open with O_DIRECT, retrying without
'/dev/vdb' is not a block device!
Command 'drbdmeta 0 v08 /dev/vdb internal create-md' terminated with exit code 20