Troubleshooting ---- technology is like doing a math problem

Troubleshooting ---- technology is like doing a math problem
Troubleshooting ---- technology is like doing a math problem
Today, when migrating FS shared servers, you may feel that project creation is like doing a math problem. If you have more experience, you can solve the problem as soon as you encounter a new math problem. Because the conditions known in the project are uncertain, and the device may be broken, the output may not be missing for you. You must be able to judge whether the problem is wrong (the device is damaged ), you must be able to determine what the situation is and how to solve it through the existing known conditions (the existing known conditions are different from the known conditions of the example. Therefore, more questions are required.
Project Overview: migrate the shared data of server A to server B because the server is aging. All shared data is stored on an ibm ds series disk array, so you can migrate the LUN. Some problems occur during the migration process. First, after the migration is completed on the DS management software, the partition cannot be seen on server B. After troubleshooting, the new server's HbA card is somewhat incompatible with the SAN Switch, you need to plug it in. The HbA card of the new server is 2/4/8 GB adaptive, and the optical fiber card of the SAN Switch is 2/4 GB adaptive. Therefore, inconsistency may occur. But it doesn't matter. Just re-plug the HBA card or change the speed of the HBA card. Haha.
Today, I still encountered a problem. I still used the DS management software to migrate the LUN and found that two Luns are unavailable. Only one LUN is available. This problem was first encountered. The solution was to divide the unavailable LUN back to server A and check whether it was available. The result was A miracle. During the division process, I identified another LUN on server B. At the beginning of dawn, I tried to divide the LUN back to server B. The result was good, but I found that the multi-path software was not effective. It may be that the multi-path software provided by the system is difficult to use. At present, the problem of multi-path is still not solved. All the drive letters are displayed multiple times, but only one of them is available in the disk management configuration.

Through the above things, the project is different from the experiment. I have done this experiment many times without any problems, and the project is comprehensive, the comprehensiveness of personnel management also includes the comprehensiveness of equipment and technology, which makes problems easy. There are more important projects, just like doing a math problem. It's just like doing a basic operation (such as experiment and basic configuration, when the known conditions in the project have changed, or the question type has changed, I am afraid that the project experience is required, and the basic knowledge is well-developed, so that we can solve the problem with quick thinking. There will also be Device Damage Problems in the project, just like an error question. The problem is determined by the existing known conditions. This cannot be solved simply by doing an example, so we need experienced people to do it!

So summing up the project is just like doing a math problem. We must not only take examples, but also have a wealth of experience to do a big question bank for the exam. Otherwise, the project cannot be completed if the question type changes. Therefore, we need experienced people to do the project.

The above is what I feel when I work overtime for FS shared migration.
-------- At AM on October 14, December 14, 2014, the hongyanhe Nuclear Power Plant worked overtime at AM in the nuclear and electric power tower.