The server in the next prefecture-level city can't run, it seems to be a hardware failure, and now the server needs to read important backup data from the tape library, and the whole network is waiting for this node, and the vice president has come to the scene, but the following point has not solved the problem until now.

Oh, now hard disks are still very expensive, small capacity, the common capacity is 80MB, for large data business is far from enough, so for the storage of massive data, generally in the form of tape library, in fact, it is a mechanical arm, can automatically replace dozens of tapes of special equipment. Tapes have a lot of storage, they are cheap, and the only drawback is that they are slow to read and write.

If a server doesn't work, who knows if it's the host or the tape library? What if both have problems? When things don't go well, they often don't go well. Lin Man had encountered this situation many times back then. That's a big problem.

Lin Man spread his hands: "Hardware failures should be found in the manufacturer's after-sales service." ”

Director Zhou said embarrassedly: "We didn't buy warranty service, you don't know how dark the manufacturer's charges are, from the time of repair, the cost is calculated according to the round-trip plane from the capital to here, even if you change a plastic switch, you have to charge more than 10,000 yuan." Director Zhou stopped his thoughts in time and said the most critical sentence, "And it's too late now, we must recover before dawn." ”

I'm almighty. Lin Man smiled bitterly: "Server model?"

"HP server, model number seems to be K160. ”

K series is a classic series, fortunately Lin Man knows, although the model is very old, but the overall structure and Lin Man familiar with the model should not be big.

"Fault code?"

Seeing that Lin Man's question was so calm, and the question was short and clear, someone handed the phone to Lin Man very sensibly. Lin Man pressed the hands-free button so that everyone could hear it.

On the other side of the phone was the maintenance staff of the prefecture-level city construction bank, who was a little anxious and quickly reported the code on the LCD panel.

It's a CPU error code, which is a bit tangled.

"How many CPUs are there?"

The other party said he didn't know. Damn, what's the use of you? Lin Man scolded in his heart, and he could understand that these servers were very expensive these days, and if the manufacturer did not provide training, the users would not dare to touch the hardware easily, what if it broke down? Just like Director Zhou said just now, it will cost tens of thousands of dollars to repair it casually.

Fortunately, Lin Man had experience in maintaining small computers in his previous life. In his most glorious time, he no longer went to the site for maintenance, but did remote support, that is, if the on-site engineer couldn't figure it out, call him, although he couldn't see the scene, he could help judge the problem according to the description and guide the other party to repair.

Lin Man looked up helplessly and looked around, everyone was looking at Lin Man at this time, Director Zhou and Secretary Tong's attitude was very clear, just waiting for him to solve the problem.

Lin Man thought about it, rubbed his stomach, he was hungry, he had a little stomach pain, and he had to endure it, it seemed that he needed to operate it remotely.

"Is there a modem in your server?" asked Lin Man.

Modem, also known as modem, was the primary device used for remote connections before there was no broadband. Data can be exchanged between the two modems via a telephone line.

The other party said to find one. Lin Man instructed him to plug in a serial port labeled Console on the back of the server, power it on, and connect it to a telephone line.

Here, Lin Man found a modem of the same model, also connected the telephone line, and then through the terminal, after reducing the transmission speed to 9600bps with the AT command of Modem, dialed the other party's modem.

Soon, Lin Man saw an operation window through the terminal, which was the console of the other party's server. After entering the switching command, Lin Man began to operate the control card of the server and retrieved the hardware power-on self-test information in it.

The minicomputer is generally equipped with a control card, which can be used to control the server to complete some hardware operations, and also store some underlying hardware information. How to look at this information and how to judge the faulty equipment, this is a secret that Lin Man learned from the engineers of the original manufacturer at the expense. Theoretically, each card and device in the minicomputer server has a unique number and location corresponding to it, and some can even infer the location based on the number. This is a complete set of nomenclature system, which provides great convenience for fault diagnosis and accurate location of fault points.

Lin Man found the error message, there are two CPUs in total, and the second one is powered on to report an error. That's not to be feared, just unplug the faulty CPU and let the server run and run.

"Find a screwdriver, yes, that's what you call a screwdriver, don't look for a cross, look for a hexagonal T10. No, let's start with a smaller one. Lin Man sat on the chair calmly and remotely guided the other party to disassemble the shell of the host.

"You need to unscrew 5 screws, 4 on the front and 1 on the bottom. Lin Man began to enter the state, and the structural diagram stored in his head seemed to be replayed in front of him, and he could clearly know the position of each screw. It's not a super memory or IQ, it's just that there are too many dismantling machines.

"See a few copper plates, two, good, that's the CPU, pull out the rightmost CPU. ”

"Pulled out. The other party's voice was a little cautious, probably the first time to pull out the CPU of the minicomputer, and came to say, "How is it completely different from the CPU of the PC, this is a big copper plate." ”

Nonsense, if it's the same as Intel's cheap CPU, can people still sell it so expensive? Intel's CPU is precisely because it is relatively cheap, it will be matched with the PC, and eventually enter thousands of households, making the PC an ordinary household appliance.

One of IBM's greatnesses is that it miniaturized expensive servers into personal computers (PCs), which drove the popularization of computers and created the two giant companies Intel and Microsoft.

Lin Man still explained to the other party responsibly: "The copper plate plays the role of a heat sink. Power on and turn on. ”

After a while, a happy voice came from the phone: "It's on." Just when everyone breathed a sigh of relief, another sentence came from there: "It seems that there is still a problem, I can't read the data." ”

Lin Man has been staring at the terminal, and the information on the server and the other party's operations have been transmitted remotely. Apparently, they only know how to call ready-made scripts to run business programs, and they don't know the basic operation and maintenance of tape libraries, and they don't know how to diagnose faults.

It can't be said that people's skills are poor. The operating system on the server is HP-UX, all operations need to be commanded, there is no graphical menu operation for the time being, ordinary people who will memorize a large number of commands to operate the server? This is also the reason why Unix, including later Linux, has not been able to enter the computers of ordinary users in large quantities, the operation is too complicated, and the maintenance is too difficult. By the time Linux's graphical interface was beautiful, the market had been largely dominated by Windows 95. But Unix is definitely more powerful than DOS and Windows, and it runs stably, so it won't crash easily.

Lin Man didn't have time to think nonsense, typed commands on the keyboard, remotely took over the other party's console, and entered the search command of the hardware link.

The other party obviously didn't know what was going on, and shouted on the phone: "I can't operate anymore, the keyboard doesn't seem to be responding." Hey, how can there be a command on the screen that is executing automatically?"

"Stop shouting. I've taken over your console, and now I'm operating the server, and you can just cooperate with me in a moment. ”

The conversation between the two made Director Zhou a little scared. He couldn't understand Lin Man's operation before, so he didn't know what was going on. The current conversation told him a serious thing, Lin Man could control their server remotely, and the technician on his side actually said that he couldn't control the server. Is this a legendary hacker?

Lin Man noticed his expression and deliberately explained: "This is not a hacking method, this is a remote control method designed by the manufacturer for the server for remote fault diagnosis." As long as you don't power up the modem, or if the modem doesn't connect to a phone line, don't worry. ”

Director Zhou breathed a sigh of relief when he heard this, if there was really a problem, he wouldn't want to sleep well.

Lin Man quickly checked the hardware link, but found no tape library, and of course it was impossible to read out the data. Lin Man suspected that there was a problem with the connection between the host and the tape library. When the other party relocates the equipment, the connection to the tape library must be disassembled and reconnected. According to the system log and device file number, Lin Man deduced which connection port it should be, and asked the other party to check and confirm, and sure enough, it was connected to the wrong port. After connecting according to the interface pointed out by Lin Man, the system immediately found the tape library. Lin Man tried to use the tape library operation command, manipulated the robotic arm to grab the tape, replace the tape, and then read out the data smoothly.

How could Lin Man remember so many commands, as well as the commands for operating the tape library? In fact, he didn't remember many commands, and besides, the old system was different from the system he was familiar with, and the commands he knew might not be useful. But he'll see help. Unix provides detailed help with various commands, which can be viewed from one command to another and then work on it step by step. Of course, a necessary premise is to get used to reading English help.

For people who don't know how to type, if they see someone typing in a command constantly, and then the system changes, they will think that they are a master. Lin Man was now surrounded by this kind of gaze. Even Mr. Qian, who understands minicomputers, is looking at Lin Man with admiration. There was no way, he had never heard of many of the commands that Lin Man had entered, and he didn't know what he was doing.

The technician on the other end of the phone was very cooperative, reporting what he saw in the tape library. Listening to the report on the phone, everyone knew that the young man in front of him was remotely operating an invisible robotic arm. People who are engaged in technology have a little bit of long-range remote control and flying swords, so there will be technologies such as remote-controlled missiles and remote-controlled satellites changing orbits.

That's it, you're done.

Director Zhou excitedly shook Lin Man's hand and thanked him repeatedly.

Lin Man really couldn't stand this enthusiasm, and tears were about to fall. Nima, do you know that if I do this kind of private work, at least 10,000 a night, and if I don't do anything less, will you say two words of thanks? No, I have to make a request, I really can't stand it.

"Well, Zhou, can you give me a stutter? I haven't eaten in a day. ”