The equipment of Tiangong Technology can be widely used in various data recovery laboratories, data analysis institutions, education platforms, big data room, command and dispatch center, multimedia data center and many other scenarios. It is the designated data source recovery technology “efficiency source technologyâ€. Equipment appearance supplier. The following is the specific application of the "Data Analysis All-in-One ED-MD9200" in the efficiency source technology data recovery service.
Equipment Name: Data Analysis Machine ED-MD9200
Function introduction: It adopts aluminum-magnesium alloy casing, military quality, and automotive paint process to design a rugged analytical equipment; the product adopts 21-inch multi-touch display, no need for external control equipment; multi-interface integrated integrated technology design, Ensure that the device connection is more convenient and the overall layout is more coordinated; support I7/I5/I3 processor configuration and SSD solid state drive to ensure efficient data processing; device special physical read-only interface, which can greatly improve the data analysis process Security and normative.
Equipment pictures:
[Editor's note: "Technical combat - hard disk opening" series 6th, efficiency source engineers explain the fourth technical combat case - Western Digital 1TB mobile hard disk open data recovery. Because the internal disk of the hard disk of this case is severely scratched, it is also a USB interface, and at the same time uses double encryption (hard disk firmware encryption USB firmware encryption), compared with the first three hard disks, has a unique typicality. The biggest difficulty (the difference) is that the conventional hard disk can directly mirror and read data after replacing the head. The dual-encrypted hard disk of the USB interface needs to undergo 2 circuit board replacements, bypassing the defective hard disk access, and the data required for the simulation decryption software starts the WDunlocker, and the key is decrypted after the key is input. Otherwise, even if the image is successfully mirrored, the original data is not visible and the data recovery directly fails. 】
The mobile hard disk generally adopts a USB interface and has the characteristics of large capacity, small size, high speed, and convenient use. In order to improve data security, many brands of mobile hard disk manufacturers are equipped with high-performance encryption methods for their high-end products. For example, Western Digital (WD) is equipped with hard drive firmware encryption and USB firmware encryption for its own series (Figure 1) (encrypted with WDunlocker software). Double encryption does enhance data security protection, but in the event of a hard disk failure, hard disk data recovery has also encountered a great problem of decryption.
Figure 1: WD Hard Drive My Passport Ultra Series
1, the actual combat object: WD hard drive 1TB mobile hard disk WD My Passport Ultra series, USB interface, the appearance is intact, no obvious signs of falls. Hard disk double encryption (hard disk firmware encryption USB firmware encryption).
2. Hard disk preparation (3 physical disks):
(1) Recovery disk A: USB mobile hard disk with fault, stored data to be extracted (2) Mirror disk B: Mirror copy data, post-analysis (3) Fitting disk C: Replace the head, replace the board (with A firmware The same version of the ordinary hard drive)
3, failure phenomenon: in use, the hard disk suddenly does not recognize, the power is abnormal
4, fault detection:
Because this case is a USB interface and double encryption, it needs to use a special method for decryption. The efficiency source has transferred a group of senior mobile hard disk decryption researchers to complete the data recovery.
Look: 360 degrees to view the recovery disk A, there is no trace of damage on the appearance, including the most easily deformed hard disk around the corners and corners.
Smell: Connected to the DRS data recovery system (Figure 2), power-on detection, abnormal noise.
Figure 2: DRS data recovery system can pre-check hard disk hardware health
Q: According to the description, the data of this hard disk is highly confidential. At the same time, in addition to hardware encryption, the hard disk is also USB firmware encrypted by WD's own program WDunlocker.
Cut: After replacing the circuit board of recovery disk A, it is powered on, and there is still abnormal noise. The exclusion is caused by the circuit board. In the double-level clean studio, the disc was found to be scratched at the position of the No. 1 disc (which is quite serious) (see Figure 3).
Figure 3: The red arrow is scratched, and the scratch is visible to the naked eye on the physical disk.
Comprehensive judgement, through special means, there is hope for recovery, but only 30%. Specific methods of observation, detection, and opening are explained in detail in the first four phases, and are not described here.
5, data recovery:
(1) Open the disk and change the head. Continue to replace the head of the accessory disk C to the recovery disk A in the double-level dust-free studio. The specific method is introduced in the first issue and will not be described.
(2) Circuit board replacement (ATA interface). Replace the accessory board C board (ATA interface) with the board of recovery board A. Because the USB interface cannot handle complex defects, the interface needs to be replaced.
(3) Mirroring, reading data separately. It has been determined in the fault detection that the disk of the No. 0 disk of the hard disk No. 1 is seriously scratched. In this case, it cannot be directly read, otherwise the magnetic head may be damaged or even cause other disks to be scratched, which seriously affects the result. The efficiency source engineer uses the DRS data recovery to perform the "segmented read" function of the system (Fig. 4), splits the hard disk, skips the scratched area of ​​the disk, and transfers the recovery disk A data to the mirror disk B.
Figure 4: The DRS data recovery system can use “separate read†(this figure only shows the “split†effect, not the corresponding picture of the hard disk in this case, H1-H8 can be selected in the figure)
(4) Special processing, decryption: Because the recovery disk A is double-encrypted, although the data is mirrored to the mirror disk B, the original data cannot be seen, and decryption is required to realize the normal recognition of the hard disk, which is one of the difficulties of the case.
If the recovery disk A is only the hard disk firmware encryption, it can be directly decrypted by using DRS related operations. However, if the disk is "double encryption", the difficulty is linearly upgraded, and a key problem must be solved first - to have the recovery disk A pop the decryption dialog box encrypted by the WDunlocker software. The recovery disk A is a fault disk with a stencil scratch. If the computer is used again, the hard disk may cause secondary damage, and may not be read.
In the data recovery practice, similar situations often occur. The efficiency source engineer has developed a complete and effective solution to deal with it. The second board replacement method pops up a dialog box (the specific operation is omitted), which protects the hard disk from two. The secondary damage also shows the decryption dialog (Figure 5).
Figure 5: The software decryption dialog is displayed by special means (blue box)
(5) Restore data. At this time, the data extraction function of the efficiency source DRS data recovery system is used again, and the data of the recovery disk A and the mirror disk B are extracted at the same time. During the process of reading recovery disk A, DRS will automatically adjust the data of reading mirror disk B when it encounters bad sectors. In the end, data recovery was a complete success (Figure 6).
Figure 6: Extraction results
[Editor's note: According to the efficiency source engineer, there are two major difficulties in this case: (1) complex defect processing of the USB interface hard disk (divided read); (2) pop-up decryption without booting the hard disk through the PC Dialog. At these two points, the engineers used the special means of independent research and development to deal with them. At the same time, in view of the prevailing situation, the split-head technology has been integrated into the latest DRS data recovery system and other products, which can be completed by clicking. However, similar to the operation of changing the board, it needs to be carried out manually. The requirements for the operator's comprehensive material are extremely high. It must be carried out with very good practical experience before it can lead to data recovery failure. 】
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