以下文章來自
http://reviews.ebay.com/Samsung-SLC-Flash-Vs-MLC-Flash-Kingston-Toshiba-Hynix_W0QQugidZ10000000000692467
Samsung SLC Flash Vs MLC Flash [Kingston Toshiba Hynix] Comparison
For all Flash Cards MERCURY is using Samsung Flash Chips and its Wafer is SLC. (Single Level Cell)
The newest MERCURY 1GB MMCmobile is also build with SLC Flash Chips.
For most Flash Cards Kingston is using Toshiba Flash Chips and its Wafer is MLC. The Kingston 1GB MMCmobile is build with MLC Flash Chips.(Multi Level Cell)
SLC Advantage
[What is SLC or MLC?]
Basically there are two different types of NAND flash.
The first is called SLC or single level cell flash while the second one is called MLC or multi level cell flash.
The main difference is that SLC stores a single bit of data per cell whereas MLC, by using a larger number of voltage levels, stores two bits of data per cell.
[What are the advantages of SLC?]
Unfortunately for the MLC flash, the ability to store more data per cell also came with reliability and performance disadvantages.
-Significantly slower read and write speeds.
-10x lower read/write lifetime (100,000 R/W -> SLC, 10,000 R/W -> MLC)
-Shorter data retention time.
-Thus SLC flash has much better performance, lifetime, and reliability properties than MLC.
[Conclusion]
MLC is used to reduce the cost for flash memory card production and is found in the majority of the lower speed generic cards.
SLC flash is used for higher performance flash memory and is only used by a few of the higher end flash card producers.
All MERCURY Flash cards use Samsung SLC NAND flash for maximum performance, reliability, and lifetime.
(K9XXG08UXM) Flash Memory 這個是MLC
Memory Cell : 2bit / Memory Cell
Endurance : 5K Program/Erase Cycles(with 4bit/512byte ECC)
Data Retention : 10 Years
http://www.datasheet.in/datasheet-html/K/9/G/K9G4G08U0A_Samsung.pdf.html
(K9F2G08UxA) SLC
Endurance : 100K Program/Erase Cycles(with 1bit/512Byte ECC)
Data Retention : 10 Years
http://www.datasheet.in/datasheet-html/K/9/F/K9F2G08U0A_SamsungElectronics.pdf.html
MLC MLC用了比較correction capability 較佳的ECC
結果cell 的endurance 還比不上SLC....
另外，最近有看到好像有人在研究Hybrid-SSD（NCTU那邊的研究）
就是把MLC+SLC 的 flash chips 弄在同一個SSD上
（應該不是ASUS那種號稱20G結果是兩個分別的硬碟）
不過這個應該還是學術研究階段，不知道何時會有實際產品就是了
有興趣的可以去IEEE 搜尋
Hybrid solid-state disks: Combining heterogeneous NAND flash in large SSDs
沒辦法，16G安裝xp，個人使用實在是頓到不行，無法忍受，覺得等待的時間幾乎都可以把電池耗光了... 現在4G的xp灌好了，這個速度就可以接受了！
這樣看來，$11500(4G) + 16G$2200(類似on board SDHC) + 大一點的電池容量 + 大很多的螢幕
新一代的定價還是OK的，而且留下的伏筆是，那個16G是可以換的，說不定日後可以換高速的或其他的儲存裝置...當然若可以留下擴充槽，自行選擇要不要那16G，那是最棒的！
雖然說16G很慢，但是裝AP和DATA都算OK，又多了SD槽可以用， 整體還是見仁見智摟！
使用上總歸一句，就是好在那個SIZE，好在那個螢幕！
暫時用不到的話，忍得住的還可以再忍，不是說六月又會有新的？10吋？ATOM? 還是其他品牌...
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