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(2) When the firmware is damaged, there will also be abnormal noise, plus the firmware must be rewritten. 3. IBM hard disk failure evaluation For the IBM really hard disk, the common failure is to produce abnormal sounds, related for the alarm sound. This can be mainly brought on by the make contact with issue amongst the circuit board plus the disc physique. Commonly utilised spindle drive chip models are 90G2018 and 90G3517. Fault phenomena and vulnerable elements: 1) No rotation (1) 90G2018 is easy to burn out. The primary explanation is the fact that the heat dissipation is just not excellent and really should be replaced. (two) 90G3517 is easy to brief circuit. (3) The setting in the jumper is wrong, and occasionally it can not turn. You can reset the jumper. 2) Abnormal noise (1) 9062018 has poor heat dissipation. (2) Poor speak to or displacement among the circuit board plus the disc body, correct the position and repair the contacts to produce them in great make contact with. (three) The firmware is damaged, the firmware should be rewritten. four. restore img file of Maxtor challenging disks The significant series of Maxtor tough disks are gold diamond series, star diamond series, and magnesium drill series, of which the firmware with the magnesium drill series is fragile. Typically made use of spindle drive chips are SH6770C, PTLS2270, PTLS2271. Fault phenomena and vulnerable components: 1) No rotation (1) The drive tube is simply broken; (2) The spindle drive chip is very easily broken; (three) Several 1R00 resistors about the spindle drive chip will also trigger no rotation; (4 ) It will not turn after the CPU is damaged. 2) Abnormal noise (1) 78L08 three-terminal regulator block is damaged; (two) 014L, 014N field impact tube is damaged; (3) Firmware is damaged (magnesium drill firmware is relatively undesirable); (4) Magnetic head is damaged Opening maintenance, replaceable head. 5. Seagate difficult drive failure analysis Seagate challenging drives have the highest market share. It often appears that the failure phenomenon isn't turning or abnormal noise. Seagate tough drives are mostly divided into two series, namely U series and Kuyu series. Among them, U series, U4, U5, U6, U8, U10 and other series are frequent. The generally utilised models of spindle drive chips are 23400278-002, 100143434, 100124439, SH6950D and also other fault phenomena and vulnerable components: 1) No rotation (1) 23400278 burnout; (two) A voltage regulator diode from 12V is simple to break down For instance U5, U6 series); (three) At times CPU harm is not going to lead to failure; (four) 100143434 burns out a lot more, SH6950D can also be effortless to burn out. 2) Abnormal noise If there is absolutely no dilemma with all the magnetic head, you must check regardless of whether there's a problem with the circuit supplied by the magnetic head. (1) The magnetic head is damaged; (2) The 1R0 resistance supplying the magnetic head is effortlessly broken; (three) The 2P102 field impact tube is simply broken; (4) The poor heat dissipation with the chip can also bring about abnormal noise, like the SH6950D chip. six. Fault analysis of Fututong difficult disks The widespread fault phenomena for Fututong hard disks are undesirable tracks or non-rotation, or the sound is regular, however it can't be detected. However, the driver chip used by Fujitsu is commonly not straightforward to damage. Failure phenomenon and vulnerable components: 1) The key cause is that the CPU or BIOS is very easily damaged, followed by the energy provide circuit failure. 2) The sound is normal, nevertheless it cannot be detected (1) The exclusion or damage is damaged; (two) The BIOS is damaged; (3) The firmware is damaged (the principle explanation). 7. Laptop HDD failure analysis For laptop HDDs, the repair is related to the principle of desktop tough drives. The main distinction in between it as well as the desktop is: (1) The power supply voltage is distinct (the desktop really hard disk has 5V and 12V two sets of energy supply, the notebook challenging disk has only 5V 1 set of energy provide); (two) the energy provide resistance to ground is just not the exact same (desktop : About 600Ω or infinity, notebook: 140Ω ~ 170Ω, some may very well be slightly larger, but it may perhaps not be infinity); (3) The begin and cease regions are diverse (the begin and cease regions with the notebook are outside the disc, so trace The sound is often a tiny shorter, but at times the head will probably be stuck in the course of tracking, and it is less difficult to restore the data). Fault phenomena and vulnerable components: no rotation: blown fuse (can be judged by measuring the resistance worth on the power supply to ground) to replace the fuse. Harm to the CPU will also cause non-rotation, replace the CPU (normally poor peripheral components usually are not faulty, when it is actually suspected that the CPU is faulty, replace the circuit board extra). Additionally, it truly is necessary to connect the transfer interface when repairing terrible tracks or writing firmware, however the transfer interface can't be reversed, otherwise it's going to harm the challenging disk. restore img file : The above common really hard drive failures could be summarized as shown in Figure 3-23. In this way, when the challenging disk hardware is fixed, you are able to quickly come across the fault place.