WD 2.1.9.x T2 Editor with Formatting: System Explanation A

Hello everyone, I'm William. In this tutorial, I will introduce the brand new T2 Editor guide for the Western Digital 800xx hard drive. The tutorial is based on version 2193.

This tutorial is part of a series and is divided into two parts: the Firmware Unlock Basics tutorial and the T2 Editor Advanced tutorial.

1) The Firmware Unlock Basics tutorial has been released. Depending on the unlocking tool you are using, please refer to the following link:

MRT programmer method: https://us.mrtlab.com/tech/wdc/359.html

MRT Equalizer method: https://us.mrtlab.com/tech/wdc/360.html

Note: The backup and erase of module 190 demonstrated in the unlocking tutorial is only applicable to power-on issues caused by errors in module 190. If the ID can still be recognized after unlocking and 411 is not disabled, there is no need to erase module 190.

2) The T2 Editor Advanced tutorial is divided into two parts: System Explanation (Part A) and Case Studies (Part B).

This tutorial will introduce the T2 Editor with formatting: System Explanation (Part A).

Due to the complex update mechanism of module 190 entries, its data update is based on user operations. Additionally, the LBA entries recorded in module 190 are essential for user data. When errors occur due to frequent updates of the 190 entries, it can result in various types of malfunctions.


In the historical update versions, as our understanding of module 190 deepened gradually, we sequentially added a series of features:

1. Support for reading and writing large module 190 and expanding entries.

2. Support for reading physical addresses in PBA mode.

3. Support for relatively complete reconstruction algorithms of 190 entries.

4. Support for reconstructing 190 with minor entry loss.

5. Support for expanding 190 with multiple tags.

6. Support for expanding 190 with slightly damaged header structure.

7. Support for expanding 190 with lost tags.

8. Support for finding all entry nodes.

In this latest update version,, we have added the function of manually selecting LBA entries, multiple reconstruction algorithms, and support for expanding more error types of module 190. This can greatly handle cases where the default expanded entries are almost empty, the default expanded entries are severely damaged, and formatted 190. 

Now let's address a question: Why did the handling of module 190 become more complex in version 2193? 

The fundamental reason is that there are extremely diverse types of malfunctions related to module 190, and currently, there is no unified algorithm that can support all types of 190 malfunctions.

The tutorial will provide a complete set of handling methods that need to be flexibly used.

Disclaimer: Please watch the tutorial carefully. The two parts of the tutorial will reveal what types of 190 malfunctions can be handled, how much data can be recovered after handling, how to use different reconstruction methods, which types of 190 malfunctions have low data recovery rates, and which types of 190 malfunctions cannot recover data.

The collected 190 malfunctions currently represent only the tip of the iceberg. To handle more types of malfunctions, it is necessary to master the methods and perform more precise operations.




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