Tag Archives: ECC

PC-3000 Flash. How to work with the problem memory chips.

Posted on 03/21/2016 by ACELab team

There are a lot of different memory chips with reading problems such as not corrected ECC errors, dump filled by “FF” or other pattern etc. In this article we would like to talk about different problematic memory chips and solutions … Continue reading →

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PC-3000 Flash. Methods of data correction. Voltage control

Posted on 12/25/2015 by ACELab team

In our final part of article Methods of data correction, we will speak about voltage control. In which cases voltage control can help us to fix errors? If to say in a few words – it can help only in … Continue reading →

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PC-3000 Flash. Methods of Data Correction. Readout

Posted on 12/18/2015 by ACELab team

In previous article we spoke about ECC correction – first and the main way of bit error correction. Sometimes this feature might be very effective, but in case if your NAND chip base on TLC architecture, there is a high … Continue reading →

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PC-3000 Flash. Methods of Data Correction. ECC

Posted on 12/16/2015 by ACELab team

In this line of articles we will speak about different ways of dump correction. I think that it is not a secret that during NAND memory chip reading some bit errors might appear. The number of bit errors depends from … Continue reading →

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PC-3000 Flash. Compact Flash recovery. SM2234H

Posted on 11/04/2015 by ACELab team

Compact Flash cards – are the most fastest memory cards in the market. The main secret of CF – is a very powerful controller, which has direct access to several physical memory chips, which are placed on the CF PCB. The architecture of … Continue reading →

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PC-3000 Flash. Page tranformation

Posted on 07/09/2015 by ACELab team

All the data stored in a flash microchip is divided into several categories: 1. Page (a group of sectors, 4-8-16 or more (varies from chip to chip)) 2. Block (a group of pages, 64-128-256-258 or more) 3. Bank (a group … Continue reading →

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PC-3000 Flash. How to change the page size

Posted on 06/08/2015 by ACELab team

One of the most popular problem in modern tasks – try to find correct XOR for data re encryption. About XOR you always can read more information by the following link. In this article you will find the way, how … Continue reading →

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PC-3000 Flash. How to search and apply XOR from the list of available patterns

Posted on 06/08/2015 by ACELab team

XOR – is some kind of special operation which allows controller encrypt data with special pattern. So, basically we can call it “soft encryption”, because this XOR can change user data and does not allow us to find any headers in … Continue reading →

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PC-3000 Flash. How to improve quality of dumps using Readout and ReadRetry feature

Posted on 06/04/2015 by ACELab team

Starting from PC-3000 Flash SSD Edition ver. 6.2.1 new function of readout has been added. This feature allows to apply auto verification + ECC and reread bad pages from memory chips with better quality result. Modern memory chips contain a … Continue reading →

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PC-3000 Flash. How to detect and eliminate addings (Inserts, Bad Columns) in dump

Posted on 06/04/2015 by ACELab team

All modern memory chips have a very low quality. It means that each new generation of memory chips have much more bad cells than previous generation. It happens because technological process which is used during memory chip production become smaller … Continue reading →

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