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Hello everyone, today we're going to learn about the data preservation maintenance of the Apple laptop

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Hard drive data preservation means that there are important data stored in the hard drive,

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but the computer is damaged,

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and it is necessary to read out and save the important data in the hard drive through special means,

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which is called data preservation maintenance.

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If the laptop using these two hard drives is damaged,

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if you want to keep the data,

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first of all, we must make sure that the hard drive itself has no problems

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If the hard drive itself is not damaged, the data in the hard drive can be saved

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If the hard drive itself is damaged, the data stored in the hard drive will basically not be preserved

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The hard drive itself is not broken, but the mainboard is damaged,

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we can try to repair the mainboard, and then read the data in the hard drive

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If the mainboard cannot be repaired, we can remove the hard drive,

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install it in another laptop of the same type, and read the data on the hard drive when it is turned on

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For example, this A1466, this hard drive can be taken out,

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inserted into another laptop, turned on and then read the data inside

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If the hard drive is damaged, the machine cannot be turned on,

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the system cannot be entered, and the data cannot be recovered.

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It is more difficult to save data on the hard drive of Apple laptops with T2 chips

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This is a T2 chip, and this is a solid state drive

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Its hard drive master control is integrated inside the T2 chip

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Laptops that use the above hard drives, if they are damaged and we want to retain the data,

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first of all, make sure that the hard drives have no problems

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If the hard drive is damaged, the data in the hard drive cannot be saved

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If the hard drive is not damaged, but the mainboard is damaged,

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we can try to repair the mainboard and read the data

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If the mainboard cannot be repaired, we need to move the board,

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that is, move the hard drive kit to another good mainboard to read the hard drive data,

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this operation is more troublesome

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Next, let's take a look at the hard drive kit

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For laptops with T2 security chips,

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the precondition for data protection is that the four-piece set must function normally

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The four-piece set refers to the T2 chip, hard drive, logic chip and SOCROM

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The 4-piece set is indispensable, and the function of the 4-piece set must be normal and cannot be damaged

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After moving the four-piece set, first turn it on to see if it can enter the system normally

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If it can enter the system normally, you can read the data directly

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If it cannot enter the system, we can repair the T2 firmware first

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T2 firmware refers to this Bridge OS

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If we still cannot enter the system after repairing the T2 firmware,

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we can only restore the T2 firmware

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If it really comes to the step of restoring the T2 firmware, it is meaningless

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Because in the process of restoring the T2 firmware,

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its hard drive data will be completely erased, which is a failure to save data

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If the T2 firmware is damaged, or the bottom layer of the hard drive is damaged,

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or the chip data of the T2 is damaged,

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it will be in recovery mode or DFU mode when it is turned on

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In this case, you can try to repair the device

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If the repair can pass, the data can be saved,

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if the repair is not successful, the data will not be saved

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The hard drive should be disassembled in sequence and replaced in the same position

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For example, if we want to move the four-piece set,

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U8600 must be soldered back to the U8600 position of the good mainboard,

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and U8700 must also be soldered to the U8700 position of the good mainboard

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One-to-one, the same position must be moved over, the order must not be wrong,

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and the machine cannot be turned on if it is installed incorrectly