SLC vs MLC vs TLC

Выбор карты памяти для регистратора.

Купил тут я значит новый видеорег для авто - BlackVue DR650S-2CH. Уж очень мне они нравятся во всём. Да и уже 3 раза в авариях меня выручали, старый давно уже окупился :-)
Брал на еБае за $360 с доставкой из Америки, при получении таможня содрала ещё 110 шек.

В общем, заморочился выбором карты памяти правильной. Оказывается есть неправильные! Это я раньше знал, но как-то думал, что я всегда правильные покупал. Оказалось, нет :-)

Вначале немного теории на английском, потом я резюмирую ниже.

• SLC - Single level cell provides high performance, low power consumption; faster write speeds, and higher program/erase cycles per cell, but at a higher cost. These devices are mainly used in high end server applications.

• MLC - Multi level cell provides a lower cost than SLC; however, MLC has a lower endurance limit and lower program/erase cycles than SLC, and is a good fit for commercial/workstations platforms and applications.

• TLC - Three level cell provides higher density, but has lower endurance limits, slower write read speeds, and lower program/erase cycles than SLC and MLC. To this point, TLC NAND has been used primarily in flash devices; however, technological advancements are making TLC an option for normal applications.

NAND cell technology

A single NAND flash die is typically subdivided into 512 MB blocks, and each block is typically subdivided into 4 KB pages. You can read and write to individual pages as long as they are empty; however, once a page is written, it can’t be overwritten - it must be erased first before it can be written to again. This sequence of writing, erasing, and then writing again is known as the Program/Erase cycle. The P/E cycle can serve as a criterion for quantifying the endurance of a flash storage device.

 Physically, all three NAND technologies consist of similar transistors; the only difference is that they store different amounts of charge. All three work similarily, applying voltage to a cell to go from an “off” state to an “on” state. SLC uses two distinct voltage states representing one bit per cell and two logic levels (0 and 1). MLC uses four distinct voltage states representing four logic states (00, 01, 10, 11) or two bits. TLC uses eight distinct voltage states representing eight logic states (000, 001, 010, 011, 100, 101, 110, and 111), or three bits.

Резюмирую.

1. SLC - cамые надёжные (до 100К циклов перезаписи ячейки), нереально дорогие и обычно доступны на небольшие объёмы. Используются в важных устройствах, где надёжность главное.
2. MLC - менее надёжны (до 3-5К циклов), используются в менее важных устройствах.
3. TLS - самые не надёжные (до 1К циклов), самые дешёвые - продаются во всех магазинах для рядовых пользователей. 

Вот список, который я составил по разным источникам.
В Израиле проверил несколько компьютерных магазинов, не нашёл MLC вообще. На еБае и Амазоне ещё есть MLC варианты с доставкой, ищите по кодам.

SLC

1. swissbit (2GB) SDHC 6 SLC [SFSD2048N1BW1MT-I-ME-111-STD]
2. swissbit (4GB) SDHC 10 SLC [SFSD4096N1BW1MT-I-DF-111-STD]
3. swissbit (8GB) SDHC 10 SLC [SFSD8192N1BW1MT-I-QG-111-STD]

MLC

1. ATP (16GB) SDHC 10 MLC [AF16GUD]
2. ATP (32GB) SDHC 10 MLC [AF32GUD]
3. ATP (8GB) SDHC 10 MLC [AF8GUD3]
4. Barun Electronic’s Gold Flash PRO (64GB) MLC
5. Lexar High-Performance UHS-I 633x MicroSD (64GB) MLC [LSDMI64GBBNL633R]
6. Lexar High-Performance UHS-I cards [300x] (64GB) MLC [LSDMI64GBBNL300A]
7. Memorette (memento) Standard premium (8GB) MLC
8. PNY Turbo Performance 64GB High Speed MicroSD [2015 Edition] MLC [P-SDUX64U390G-GE]
9. PNY Turbo Performance High Speed MicroSD (64GB) MLC [P-SDUX64U190-GE]
10. Samsung PRO [New 2014 Series] (64GB) MLC [MB-MG64DA]
11. SanDisk (64GB) SDXC 10 MLC(probably) [SDSDQQ-064G-G46A]
12. Sony High-Speed R95 UHS-3 (64GB) MLC [SR64UXA]
13. Transcend (64GB) SDXC UHS-I U3 MLC [TS64GUSDU3]
14. Transcend (8GB) SDHC 10 MLC [MMBTR08GUBCA-ME]

TLC

1. Barun Electronic’s Gold Flash PLUS (32GB) TLC
2. For Samsung UHS-I Class 10 (32GB) TLC
3. Kingston Advanced Class 10 UHS-I (64GB) [Also Known As Kingston UltimateX MicroSD] TLC [SDCX10]
4. Kingston CL10 UHS-I 90R/45W MicroSD (64GB) TLC [SDCA10]
5. Memorette (memento) Expert (64GB) TLC
6. OEM microSD by Samsung (64GB) TLC
7. Patriot (32GB) SDHC 10 TLC [PSF32GMCSDHC10]
8. Samsung (32GB) SDHC 10 TLC [MB-MSBGAEU]
9. Samsung EVO (64GB) TLC [MB-MP64DA]
10. Samsung PRO [Old Series] (64GB) TLC [MB-MGCGBA]
11. Samsung Plus (64GB) TLC [MB-MPCGCA]
12. SanDisk (128GB) SDXC 10 TLC [SDSDQUAN-128G-G4A]
13. SanDisk (200GB) SDXC UHS-I U1 TLC [SDSDQUAN-200G-G4A]
14. SanDisk (32GB) SDHC 10 TLC [SDSQUNC-032G-GN6MA]
15. SanDisk (32GB) SDXC 10 TLC [SDSQUNC-064G]
16. SanDisk Extreme Plus microSDXC UHS-I [2014 Edition] (64GB) TLC [SDSDQX-064G]
17. SanDisk Extreme microSDXC UHS-3/U3 [2014 Edition] (64GB) TLC [SDSDQXN-064G]
18. SanDisk Standard Class 4 (32GB) TLC [SDSDQM-032G-B35]
19. SanDisk Ultra UHS-I [2014 Model] (64GB) TLC [SDSDQUAN-064G]
20. SanDisk Ultra UHS-I [Old series] (64GB) TLC [SDSDQUA-064G]
21. Transcend Premium UHS-I [300x] (64GB) TLC [TS64GUSDU1E]

Список используемой литературы (для продвинутых)

1. Re: Выбор карты памяти (обсуждение, тесты, сравнения, рекомендации)
   http://car-dvr.info/forum/index.php?topic=579.msg36138#msg36138
2. MicroSD Round Up – Reviews and Giveaways!
   http://ourberries.com/2014/09/16/microsd-round-reviews-giveaways/
3. MicroSD Card Whitelist for MOBOTIX Cameras
   http://www.mobotix.com.pl/download/planowanie/mx_IS_microSD-Cards_en_20150921.pdf
4. Using External SD to extended Internal Storage - MLC vs TLC MicroSD Card considerations!
   http://androidforums.com/threads/using-external-sd-to-extended-internal-storage-mlc-vs-tlc-microsd-card-considerations.895657/
5. Differences between SLC, MLC and TLC NAND
   http://h10032.www1.hp.com/ctg/Manual/c03757461.pdf (mirror link)