--- title: "Data recovery from Patriot P210 512GB SSD - EXALAB" description: "Data recovery case from a Patriot P210 512GB SSD with Silicon Motion SM2259XT DRAMless controller and QLC NAND. Progressive cell degradation, complete 100% binary image with PC-3000 Express." url: "https://www.exalab.cz/en/blog/from-practice/labnotes/patriot-p210-512gb-data-recovery-sm2259xt-nand-degradation" date: "2026-05-17T01:29:33+00:00" language: "en-GB" --- ## Patriot P210 512GB – When an SSD Reads Half a Gigabyte and Then Freezes Some SSDs fail suddenly and without warning, others manifest themselves through gradual deterioration in readability. The second scenario brought a Patriot P210 with 512 GB capacity to our lab. The customer described a situation where the drive would initialize correctly, but after reading roughly half a gigabyte of data it stopped responding. A classic symptom of NAND memory degradation. ![Patriot P210 512GB – když SSD čte jen půl gigabajtu a pak se zasekne](https://www.exalab.cz/images/blog/EN2602121-Patriot-P210-fw1200.jpg) The case ultimately demonstrated that not every NAND flash defect has to mean data loss or expensive repair. With a patient approach and the right combination of read methods, we were able to obtain a complete binary image. ## What's inside the Patriot P210 After removing the cover, we found a compact PCB with a Silicon Motion SM2259XT controller and a single NAND memory chip marked 29RD4T2ANCQJ1. Looking at these two components tells us a great deal about why the drive started failing. - Otevřená PCB disku Patriot P210. Vlevo řadič Silicon Motion SM2259XT, vpravo paměťový čip NAND 29RD4T2ANCQJ1. Disk je osazený jen jedním NAND čipem, další pozice na desce zůstávají neosazené. **/ EN:** Patriot P210 internal PCB. Silicon Motion SM2259XT controller on the left, NAND memory chip 29RD4T2ANCQJ1 on the right. Only one NAND chip is populated; the remaining pads are left empty. [Otevřená PCB disku Patriot P210](https://www.exalab.cz/images/igallery/resized/patriot-p210-512gb-kdyz-ssd-cte-jen-pul-gigabajt-46/en2602121-pcb-1200-900-82.jpg) ![Otevřená PCB disku Patriot P210](https://www.exalab.cz/images/igallery/resized/patriot-p210-512gb-kdyz-ssd-cte-jen-pul-gigabajt-46/en2602121-pcb-600-450-82.jpg "Otevřená PCB disku Patriot P210") Otevřená PCB disku Patriot P210. Vlevo řadič Silicon Motion SM2259XT, vpravo paměťový čip NAND 29RD4T2ANCQJ1. Disk je osazený jen jedním NAND čipem, další pozice na desce zůstávají neosazené. **/ EN:** Patriot P210 internal PCB. Silicon Motion SM2259XT controller on the left, NAND memory chip 29RD4T2ANCQJ1 on the right. Only one NAND chip is populated; the remaining pads are left empty. [](https://www.exalab.cz/javascript:void(0);) [](#) [](#)- [ ![Otevřená PCB disku Patriot P210](https://www.exalab.cz/images/igallery/resized/patriot-p210-512gb-kdyz-ssd-cte-jen-pul-gigabajt-46/en2602121-pcb-120-90-82-c.jpg "Otevřená PCB disku Patriot P210") ](https://www.exalab.cz/javascript:void(0);) [](https://www.exalab.cz/javascript:void(0)) [](https://www.exalab.cz/javascript:void(0)) The SM2259XT is what's known as a DRAMless controller — a controller without its own DRAM cache. Every SSD stores the mapping table in NAND as a persistent copy — otherwise it would lose track of where data is physically located after power-off. Controllers equipped with DRAM load the entire table into fast cache memory after startup and work with it from there. The SM2259XT doesn't have this option — it has only a small internal SRAM on the controller die itself, which holds just a fraction of the mapping table. The rest has to be read continuously from NAND during operation, whenever a request arrives for an address whose mapping isn't currently cached in SRAM. You can read more about controller function in SSDs in the section [SSD architecture — the controller](https://www.exalab.cz/index.php?option=com_content&view=article&id=77:zachrana-dat-z-ssd-2&catid=2:zachrana-dat&Itemid=750&lang=en#PrincipController). This means the controller is directly dependent on NAND readability for every single access — if read quality deteriorates in the area where mapping structures are stored, it immediately affects the function of the entire drive. - Detail řadiče Silicon Motion SM2259XT v pouzdře TFBGA. Označení PRKX09.00 odpovídá firmware. Kód 2006 značí výrobní šarži (rok 2020, týden 06). / **EN:** Close-up of the Silicon Motion SM2259XT controller in a TFBGA package. The PRKX09.00 marking refers to firmware. Code 2006 indicates the production batch (year 2020, week 06). [Detail řadiče Silicon Motion SM2259XT](https://www.exalab.cz/images/igallery/resized/patriot-p210-512gb-kdyz-ssd-cte-jen-pul-gigabajt-46/en2602121-controller-1200-900-82.jpg) ![Detail řadiče Silicon Motion SM2259XT](https://www.exalab.cz/images/igallery/resized/patriot-p210-512gb-kdyz-ssd-cte-jen-pul-gigabajt-46/en2602121-controller-600-450-82.jpg "Detail řadiče Silicon Motion SM2259XT") Detail řadiče Silicon Motion SM2259XT v pouzdře TFBGA. Označení PRKX09.00 odpovídá firmware. Kód 2006 značí výrobní šarži (rok 2020, týden 06). / **EN:** Close-up of the Silicon Motion SM2259XT controller in a TFBGA package. The PRKX09.00 marking refers to firmware. Code 2006 indicates the production batch (year 2020, week 06). [](https://www.exalab.cz/javascript:void(0);) [](#) [](#)- [ ![Detail řadiče Silicon Motion SM2259XT](https://www.exalab.cz/images/igallery/resized/patriot-p210-512gb-kdyz-ssd-cte-jen-pul-gigabajt-46/en2602121-controller-120-90-82-c.jpg "Detail řadiče Silicon Motion SM2259XT") ](https://www.exalab.cz/javascript:void(0);) [](https://www.exalab.cz/javascript:void(0)) [](https://www.exalab.cz/javascript:void(0)) The second important piece of information is hidden in the memory chip designation. The "29R" prefix in the name 29RD4T2ANCQJ1 reveals that this is a chip with so-called SpecTek grading. SpecTek is Micron's subsidiary that sells NAND chips which didn't pass full quality binning. In practice, this means a potentially higher baseline error rate compared to fully graded chips. Decoding the rest of the part number then points to QLC NAND memory from Intel/Micron with 96 layers. QLC means each memory cell stores 4 bits of data using 16 different voltage levels. For comparison — TLC memory uses 8 levels for 3 bits. The more levels, the more sensitive the cell is to wear — and the more easily read errors occur. We cover NAND memory types in greater detail in the section [NAND chip quality — SLC/MLC/TLC/QLC](https://www.exalab.cz/index.php?option=com_content&view=article&id=77:zachrana-dat-z-ssd-2&catid=2:zachrana-dat&Itemid=750&lang=en#PrincipNANDquality). The combination of a DRAMless controller, QLC memory, and SpecTek grading creates a storage medium with minimal manufacturing cost — but also one more susceptible to readability problems as it wears. And that's exactly what happened in this case. ## Diagnostics in PC-3000 After connecting the drive to the PC-3000 Express, the SSD enumerated and identified correctly. SMART diagnostics confirmed our suspicion — the drive showed errors pointing to NAND memory issues. When we attempted to read, the behavior matched the customer's description exactly: the first few hundred megabytes read fine, then the process stalled on unreadable areas. For QLC memory, this pattern of degradation is to be expected. As wear progresses, voltage distributions of individual cells widen and overlap, leading to an increase in bit errors. The controller attempts to correct errors using its built-in ECC system — the SM2259XT uses NANDXtend technology with multi-tier LDPC correction. First it tries a fast "hard" correction, and if that's not enough, it moves to slower "soft" decoding with finer voltage threshold resolution. But when the error count exceeds even the correction capabilities of soft decoding, sectors become unreadable. - Výsledek čtení v PC-3000 Data Extractor: všech 1 000 215 216 sektorů úspěšně přečtených, žádné chyby ECC. Stoprocentní binární kopie po několika týdnech práce. / **EN:** Read result in PC-3000 Data Extractor: all 1,000,215,216 sectors read successfully, no ECC errors. A complete binary image after several weeks of work. [Výsledek čtení v PC-3000 Data Extractor](https://www.exalab.cz/images/igallery/resized/patriot-p210-512gb-kdyz-ssd-cte-jen-pul-gigabajt-46/en2602121-data-extractor-1200-900-82.jpg) ![Výsledek čtení v PC-3000 Data Extractor](https://www.exalab.cz/images/igallery/resized/patriot-p210-512gb-kdyz-ssd-cte-jen-pul-gigabajt-46/en2602121-data-extractor-600-450-82.jpg "Výsledek čtení v PC-3000 Data Extractor") Výsledek čtení v PC-3000 Data Extractor: všech 1 000 215 216 sektorů úspěšně přečtených, žádné chyby ECC. Stoprocentní binární kopie po několika týdnech práce. / **EN:** Read result in PC-3000 Data Extractor: all 1,000,215,216 sectors read successfully, no ECC errors. A complete binary image after several weeks of work. [](https://www.exalab.cz/javascript:void(0);) [](#) [](#)- [ ![Výsledek čtení v PC-3000 Data Extractor](https://www.exalab.cz/images/igallery/resized/patriot-p210-512gb-kdyz-ssd-cte-jen-pul-gigabajt-46/en2602121-data-extractor-120-90-82-c.jpg "Výsledek čtení v PC-3000 Data Extractor") ](https://www.exalab.cz/javascript:void(0);) [](https://www.exalab.cz/javascript:void(0)) [](https://www.exalab.cz/javascript:void(0)) ## The path to a binary image The key to success was patience and a systematic approach. Instead of one-shot reading, we used a combination of different methods that PC-3000 offers. By gradually switching between read modes, repeatedly re-reading problem areas, and applying advanced corrections, we managed to read even the regions that had failed during initial passes. The whole process took several weeks. We let the drive work in a controlled mode, where after each freeze it automatically switched to an alternative read method. The result was a complete read of all 1,000,215,216 sectors without a single dropout — that is, a 100% binary image of the entire SSD. The customer requested a binary image of the entire drive, not just a file-system level export. The finished image was then transferred to a new SSD that the customer supplied. --- **Drive:** Patriot P210 512GB (2.5" SATA III SSD) **Controller:** Silicon Motion SM2259XT (DRAMless) **NAND:** Intel/Micron 96L QLC (SpecTek grade) **Firmware:** T0220A0 **Capacity:** 476.94 GB (1,000,215,216 sectors) **Problem:** Drive initializes but stops responding after reading approx. 0.5 GB — NAND degradation **Solution:** Combination of different read methods, re-reads, and advanced corrections in PC-3000 Express **Result:** 100% binary image --- This case illustrates that no storage medium is one hundred percent reliable, including SSDs that have no moving parts. At the same time, it shows that not every NAND defect spells disaster. Sometimes it's a matter of gradual degradation that can be overcome with professional tools and the right approach, without resorting to demanding interventions. If your SSD starts showing similar symptoms — slowdowns, freezes, or some data becoming inaccessible — do not stress the drive further by repeated reconnections and copy attempts. Each additional attempt can worsen the degradation. You can find recommendations on how to act in the first moments after a failure in the section [First steps after SSD failure](https://www.exalab.cz/index.php?option=com_content&view=article&id=77:zachrana-dat-z-ssd-2&catid=2:zachrana-dat&Itemid=750&lang=en#FirstSteps). It's better to disconnect the drive and turn to specialists with appropriate equipment. ## What if the controller itself fails In this case, the SM2259XT controller was functional and the problem lay in NAND memory degradation. There are situations, however, when the controller itself fails — the drive then doesn't initialize at all, isn't detected in the BIOS, or identifies with the wrong name and zero capacity. With DRAMless controllers, there is a thin line between "the controller isn't working" and "the controller can't load the mapping table from damaged NAND," because without external DRAM the controller depends on NAND readability from the very first moment after power-on. Addressing controller failure requires specialized procedures at the firmware level, or in the extreme case, replacing the controller with a compatible unit followed by configuration rebuild. We have these capabilities and can apply them to the Silicon Motion SM2259 family as well. So if you encounter a Patriot P210 or another SSD with this controller that doesn't respond at all, it doesn't necessarily mean your data is gone. ### Need help with data recovery? We offer a free consultation and diagnostics for hard drives, SSDs, mobile phones, RAID/NAS and other storage media. [ Free consultation ](https://www.exalab.cz/index.php?option=com_content&view=article&id=11:kontaktujte-nas-zajistime-bezplatny-svoz-a-diagnostiku&catid=2:zachrana-dat#contactnumbers) ## Technical terms in detail **DRAMless controller** — An SSD controller without its own DRAM chip. All SSDs store the mapping table (FTL — Flash Translation Layer) in NAND as a persistent copy, but controllers with DRAM load the entire table into fast cache memory after startup and work with it from there. DRAMless controllers have only a small internal SRAM on the controller die itself, which can hold just a portion of the table. The rest is read directly from NAND on demand. The advantage is lower manufacturing cost; the disadvantage is greater dependence on NAND readability for every data access. **QLC NAND** — A type of NAND flash memory where each cell stores 4 bits of data (Quad-Level Cell). To distinguish 16 possible states, it uses 16 voltage levels, twice as many as TLC (8 levels for 3 bits). Higher storage density enables a lower cost per gigabyte, but at the cost of lower endurance — typically around 1,000 program/erase cycles compared to approximately 3,000 for TLC. The tighter spacing between voltage levels also means read errors appear sooner. **ECC correction (NANDXtend)** — The error correction mechanism built into SSD controllers. Silicon Motion uses its own implementation called NANDXtend, which operates in three tiers. First it tries a fast "hard" LDPC correction, then slower "soft" decoding with finer voltage threshold resolution, and as a last safety net it uses parity data similar to RAID. If even the third tier isn't enough, the sector becomes unreadable. **Binary image** — An exact copy of the entire storage medium sector by sector, regardless of file system or data content. Unlike simple file copying, it captures deleted data, system structures, and hidden areas. It's used wherever the complete content of a drive needs to be preserved in its original form. ## Photo gallery: Patriot P210 512GB — data recovery from degraded QLC NAND - Detail řadiče Silicon Motion SM2259XT v pouzdře TFBGA. Označení PRKX09.00 odpovídá firmware. Kód 2006 značí výrobní šarži (rok 2020, týden 06). / **EN:** Close-up of the Silicon Motion SM2259XT controller in a TFBGA package. The PRKX09.00 marking refers to firmware. Code 2006 indicates the production batch (year 2020, week 06). [Detail řadiče Silicon Motion SM2259XT](https://www.exalab.cz/images/igallery/resized/patriot-p210-512gb-kdyz-ssd-cte-jen-pul-gigabajt-46/en2602121-controller-800-600-80.jpg) ![Detail řadiče Silicon Motion SM2259XT]( "Detail řadiče Silicon Motion SM2259XT") - Výsledek čtení v PC-3000 Data Extractor: všech 1 000 215 216 sektorů úspěšně přečtených, žádné chyby ECC. Stoprocentní binární kopie po několika týdnech práce. / **EN:** Read result in PC-3000 Data Extractor: all 1,000,215,216 sectors read successfully, no ECC errors. A complete binary image after several weeks of work. [Výsledek čtení v PC-3000 Data Extractor](https://www.exalab.cz/images/igallery/resized/patriot-p210-512gb-kdyz-ssd-cte-jen-pul-gigabajt-46/en2602121-data-extractor-800-600-80.jpg) ![Výsledek čtení v PC-3000 Data Extractor]( "Výsledek čtení v PC-3000 Data Extractor") - [Patriot P210 512GB SSD](https://www.exalab.cz/images/igallery/resized/patriot-p210-512gb-kdyz-ssd-cte-jen-pul-gigabajt-46/en2602121-patriot-p210-fw1200-800-600-80.jpg) ![Patriot P210 512GB SSD]( "Patriot P210 512GB SSD") - Otevřená PCB disku Patriot P210. Vlevo řadič Silicon Motion SM2259XT, vpravo paměťový čip NAND 29RD4T2ANCQJ1. Disk je osazený jen jedním NAND čipem, další pozice na desce zůstávají neosazené. **/ EN:** Patriot P210 internal PCB. Silicon Motion SM2259XT controller on the left, NAND memory chip 29RD4T2ANCQJ1 on the right. Only one NAND chip is populated; the remaining pads are left empty. [Otevřená PCB disku Patriot P210](https://www.exalab.cz/images/igallery/resized/patriot-p210-512gb-kdyz-ssd-cte-jen-pul-gigabajt-46/en2602121-pcb-800-600-80.jpg) ![Otevřená PCB disku Patriot P210]( "Otevřená PCB disku Patriot P210") - [ ![Detail řadiče Silicon Motion SM2259XT](https://www.exalab.cz/images/igallery/resized/patriot-p210-512gb-kdyz-ssd-cte-jen-pul-gigabajt-46/en2602121-controller-120-90-80-c.jpg "Detail řadiče Silicon Motion SM2259XT") ](https://www.exalab.cz/javascript:void(0);) - [ ![Výsledek čtení v PC-3000 Data Extractor](https://www.exalab.cz/images/igallery/resized/patriot-p210-512gb-kdyz-ssd-cte-jen-pul-gigabajt-46/en2602121-data-extractor-120-90-80-c.jpg "Výsledek čtení v PC-3000 Data Extractor") ](https://www.exalab.cz/javascript:void(0);) - [ ![Patriot P210 512GB SSD](https://www.exalab.cz/images/igallery/resized/patriot-p210-512gb-kdyz-ssd-cte-jen-pul-gigabajt-46/en2602121-patriot-p210-fw1200-120-90-80-c.jpg "Patriot P210 512GB SSD") ](https://www.exalab.cz/javascript:void(0);) - [ ![Otevřená PCB disku Patriot P210](https://www.exalab.cz/images/igallery/resized/patriot-p210-512gb-kdyz-ssd-cte-jen-pul-gigabajt-46/en2602121-pcb-120-90-80-c.jpg "Otevřená PCB disku Patriot P210") ](https://www.exalab.cz/javascript:void(0);) [](https://www.exalab.cz/javascript:void(0)) [](https://www.exalab.cz/javascript:void(0)) [](https://www.exalab.cz/javascript:void(0);) [](#) [](#)- [ ![Detail řadiče Silicon Motion SM2259XT](https://www.exalab.cz/images/igallery/resized/patriot-p210-512gb-kdyz-ssd-cte-jen-pul-gigabajt-46/en2602121-controller-120-90-80-c.jpg "Detail řadiče Silicon Motion SM2259XT") ](https://www.exalab.cz/javascript:void(0);) - [ ![Výsledek čtení v PC-3000 Data Extractor](https://www.exalab.cz/images/igallery/resized/patriot-p210-512gb-kdyz-ssd-cte-jen-pul-gigabajt-46/en2602121-data-extractor-120-90-80-c.jpg "Výsledek čtení v PC-3000 Data Extractor") ](https://www.exalab.cz/javascript:void(0);) - [ ![Patriot P210 512GB SSD](https://www.exalab.cz/images/igallery/resized/patriot-p210-512gb-kdyz-ssd-cte-jen-pul-gigabajt-46/en2602121-patriot-p210-fw1200-120-90-80-c.jpg "Patriot P210 512GB SSD") ](https://www.exalab.cz/javascript:void(0);) - [ ![Otevřená PCB disku Patriot P210](https://www.exalab.cz/images/igallery/resized/patriot-p210-512gb-kdyz-ssd-cte-jen-pul-gigabajt-46/en2602121-pcb-120-90-80-c.jpg "Otevřená PCB disku Patriot P210") ](https://www.exalab.cz/javascript:void(0);) [](https://www.exalab.cz/javascript:void(0)) [](https://www.exalab.cz/javascript:void(0)) Details By Frantisek Fridrich Frantisek Fridrich Parent Category: [Z praxe](https://www.exalab.cz/en/blog/from-practice) [LABnotes](https://www.exalab.cz/en/blog/from-practice/labnotes) ## Schema ```json { "@context": "https://schema.org", "@type": "BreadcrumbList", "itemListElement": [ { "@type": "ListItem", "position": 1, "name": "Home", "item": "https://www.exalab.cz/en" }, { "@type": "ListItem", "position": 2, "name": "Blog", "item": "https://www.exalab.cz/en/blog" }, { "@type": "ListItem", "position": 3, "name": "From Practice", "item": "https://www.exalab.cz/en/blog/from-practice" }, { "@type": "ListItem", "position": 4, "name": "LABnotes", "item": "https://www.exalab.cz/en/blog/from-practice/labnotes" }, { "@type": "ListItem", "position": 5, "name": "Patriot P210 512GB – When an SSD Reads Half a Gigabyte and Then Freezes", "item": "https://www.exalab.cz/en/blog/from-practice/labnotes/patriot-p210-512gb-data-recovery-sm2259xt-nand-degradation.md" } ] } ``` ```json { "@context": "https://schema.org", "@type": "Article", "mainEntityOfPage": { "@type": "WebPage", "@id": "https://www.exalab.cz/en/blog/from-practice/labnotes/patriot-p210-512gb-data-recovery-sm2259xt-nand-degradation.md" }, "headline": "Patriot P210 512GB – When an SSD Reads Half a Gigabyte and Then Freezes", "description": "Data recovery case from a Patriot P210 512GB SSD with Silicon Motion SM2259XT DRAMless controller and QLC NAND. 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