1、 For the VMware systems of the four servers are cloned from one server, if one server has the OS problems, the other 3 should have the problems too. Considering that the installation time is so long, we ignore the OS problems temporarily.
2、 Check the performance of VIS6000 and S5000, and they are both normal. The band is 50M/s and the availability is 10%, which means the problems shouldn’t come from the back-end storage.
3、Check the specified state of the link through the FC switch, and it finds that the bit error rate in the port 11 is very high, as is showed below:
4. Test to copy data in the fault server, the master link is the link connected with the port 11. Cut off this link and the performance came back to normal. As is showed:
5、Change the FC in the master link and the test performance is normal in single link.
6、Change the FC in the master link and the test performance is normal in double link.；