Visual NAND Reconstructor 7.2

We have developed solution for WD Green SSD drives based on Sandisk controllers. It was tested for now on 120GB and 480GB models, both with a Sandisk 20-82-00469-2 controller. One of the biggest challenges we encountered was the large number of 4KB data chunks, particularly in the 480GB device, which had over 120 million of them. However, with a new algorithm of data processing, sorting and assembling in Markers table, the process has become significantly faster, and what was once merely a theoretical solution is now practical. Currently, we have solutions for two WD Green SSD disks, but we are continuing to work on finding solutions for more devices.

Yet again, we have improved speed of work with Markers table element dramatically. The new algorithm of data processing, sorting and assembling in Markers table works up to 100x faster that in VNR 7.1.
The speed of processing and sorting of millions if small data chunks is more or less linear and predictable now. Here’s comparison with previous software version.

Speed of saving operations from Logical image, Shadow Copy, Data area was significantly increased, up to 60x times!
Keep in mind that for the very complex cases, where we are dealing with dozens of additional elements, like ‘Offset’ and others, speed increase may not be as high.

To speed up the process of logical image analysis in VNR File assembler, File carver or SQLite carver it’s recommended to save image to a file on SSD disk, rather than working with virtual image in VNR. Now Logical image has option to save its content to a file, using Shadow copy element. Shadow copy element allows you to copy source of the previous element and save it to a .dmp file, which is saved in a main case folder. Moreover and which is the most important, this element keeps the map of copied data in the file, which means that you can cancel saving at any time you want and later copying will be continued from the point where it was stopped.

• bBCR ReRead – ECC reread works now by page and codewords once bad bit columns were removed

• FC AI-Xor now has option to adjust the key to SA (set SA structure as service area before)

• Automatic AlcorMicro (AU) SA XOR for AI-XOR element (set SA structure as service area before)

• Read/Reread physical image from a specific address with a specific length (in eMMC-NAND Reconstructor and in VNR)

• Correct dump’ and ‘Correct dump by GPU’ on several ECC elements at once

• eMMC-NAND Reconstructor – Reread by Codewords

• Bitmap scrolling works faster without any options

• VNR Resources DB – added zoom box to enlarge device/controller/solution images. Added options to Add controller/device vendors

• YMTC NAND vendor is added (0x9B)

• Wrong “Error pages count” on the ReadRetry process

• Only one pass Reread by ECC when payload or parity area is divided into multiple areas

• ‘Paste till the end’ structure in Structure view crashing VNR

• AI XOR elements – all parameters of element are saved to case file now. By default Skip empty area checkbox is checked

• Reread process crash. When ECC is after XOR, and payload with parity area is 0000 then during Reread by ECC the reread process may stop. To avoid this error it’s necessary to uncheck ‘Check Chip’ checkbox on ECC elements following the XOR element