The array cannot be unmounted and the VCS dual-machine switching fails.

Site environment:

SUSE9SP3 linux+ VCS4.1 dual-machine, hangs the Huawei S2300E array.

Problem Description:

Execute the dual-machine switching command. In hagui, the shared log array device idea_log cannot be switched, causing the switch to fail. Processing: 1. Open the machine mount log mount.log and found the following error: Jan 22 13:52:33 - Node "IDEA-IDEA1": invoke the method StopToMount !Jan 22 13:52:33 - Node " ;IDEA-IDEA1": invoke the method StopToMount !Jan 22 13:52:33 - Node "IDEA-IDEA1": umount /sharedisks/idea_log is failed !Jan 22 13:52:33 - Node "IDEA-IDEA1" : umount /sharedisks/idea_data is successful ! The description is umount /sharedisks/idea_log is failed ! The idea_log cannot be switched over, causing the switch to fail.

2. Execute umount /sharedisks/idea_log directly under the root user to report that the device is too busy to unmount: “umount: /sharedisks/idea_log: device is busy"use umount -f -a /sharedisks/idea_data It is not possible to force the hook;

3. Execute the probe command to see which user is using the mount point

IDEA-IDEA1:/# fuser -v -m /sharedisks/idea_log

USER PID ACCESS COMMAND/sharedisks/idea_log

idea 1145 ..c.. cshroot 13548 ..c.. suroot 15305 ..c.. bash4. Found that both root and idea are in use The mount point. Because the root user does not execute the command under /sharedisks/idea_log, exclude root; log in to the idea business user, use idea stop to stop all services, and find that Apached is successfully terminated, as shown below, it is true that the client is using IDEA when logging in. The module causes the log to be written and the device to be occupied. After carefully checking that the page was opened in IE and not closed, it can be umounted normally after closing it.

Cause analysis and summary:

1)If the device is used It is not excluded that IE is always on and not closed. At this time, there is a problem if you want to switch between two machines. The best way is to stop all processes under the idea user before switching the dual-machine, and then switch between the two machines.

2) Sometimes you have to have a global view when dealing with problems. Learn to jump out and see the problem from multiple angles. For example, this time just checking the problem on the server side did not pay attention to the client call.