Our trouble-shooting series has already finished all the problems of the main parts inside the machine. As long as we can be bold and timid, basically the faults related to the hardware in the host can be judged by 7788.
Storage - that is, everyone's hard drive, there are generally fewer problems. However, if there is a problem with the hard disk, your data may be difficult to keep. Although it is difficult to remedy the big problems, if there is an early warning of the problem, there is still a great chance that it will be able to make a backup and rescue the data.
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Mechanical hard disk bad sectorsÂ
Occurrence probability: extremely high
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Phenomenon: Slow reading and writing of some files
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The internal structure of the mechanical hard disk is believed to be very clear. The composition consists of heads, arms, disks, motors, and other mechanical components. The magnetic head drives the heads to read and write disk platters and read and write data.
Each successive circle of the magnetic disk surface is a track, and each track is divided into several sectors. When the track has a problem due to physical damage, or if an error occurs because the file's read/write verification is not correct, hard disk read/write problems will occur. The former is referred to as physical bad road, while the latter is logical bad road.
Bad sectors of the hard disk, generally use a variety of hard disk detection tools such as HD TUNE scanning can be found in bad sectors. In addition, if you find normal reading and writing speeds are not normal, especially the outer ring of the mechanical hard disk should usually be the fastest part, but at this time the speed has significantly reduced, then we must pay attention to the possibility of bad sectors.
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solution:
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Logical bad sectors are relatively easy to solve. There are disk troubleshooting programs in windows . By using disk troubleshooting programs, most logical bad sectors can be repaired.
Logical bad sectors can also be resolved through low-level formatting. There are many tools available for low-level formatting. Using tools for low-level formatting also eliminates logical bad sectors and a portion of soft physical bad sectors. However, low-level formatting can not be used excessively, and it has a relatively large damage to the disk.
As for physical bad sectors, they basically can only be shielded.
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 Loss of SSD
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Occurrence probability: There is a certain probability
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Phenomenon: Blue screen / boot hard disk not found
Solid-state drives are now more and more popular because of their speed and low latency. In recent years, the price of solid-state drives has been getting lower and lower, which has made the popularity of solid-state drives faster and faster.
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However, the use of SSDs can also have a lot of trouble. Although SSDs do not have mechanical parts, they are replaced by NAND memory chips and SSDs. The central control is controlled by firmware to read and write SSDs.
Because SSD reads and writes rely heavily on firmware, the reliability of the firmware becomes a point of limiting its performance. Some improper operations, such as a sudden power failure in reading and writing, and falling data when the data line is unstable, may cause the hard disk to suddenly “steal†in the system or cause various abnormal phenomena. This is what happened to the disk.
Although the swapped disk is related to the firmware, the configuration of the machine itself will also affect the SSD's performance on this machine. Therefore, there are specific configurations of the machine with a few good luck SSDs out of disk occurs.
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solution:
Part of the SSD's out of disk, after standing for a while, the boot can be restored. If some SSDs cannot be repaired, you can use the method of removing the data cable, leaving only the power cable, and let the SSD itself try to repair the previous error.
Some SSDs can also be restored through strong brush firmware. But most of the time, if the disk is still safe, then it may be more appropriate to ask for help after the sale.
After solving the hard disk, we have basically processed all the functional hardware inside the chassis. Next, we will explore power failures in the future. This little box is the most mysterious little box for most people. Not only is its working mode rarely known, but some of the faults that belong to it can easily be attributed to other parts. It is the part that needs the most attention, so we will study it well.