SSD NAND Endurance

[idata]

Can this be true?

http://translate.google.com/translate?hl=en&sl=zh-CN&u=http://www.pceva.com.cn/html/2011/storgetest_... This site experimented to see how much data could be written to an X25-V before the NAND expired. They wrote to the device 24/7. (Seems they paused once every 12 hour to run TRIM from the toolbox).

Translation makes it hard to understand exactly how they ran the experiment, but they state:

A class (Sequential?)

• 10~100KB 80% 10 ~ 100KB 80% (System thumbnails and the like)
• 100~500KB 10%100 ~ 500KB accounted for 10% (JPG images and the like)
• 1~5MB 5% 5% 1 ~ 5MB (big picture, MP3 and the like)
• 5~45MB 5% 5% 5 ~ 45MB (video clips and the like)

Where B is random write categories: (Random?)

• 1~100 100% 1 to 100 bytes of 100% (System log and the like)

In total there were able to achieve 0.73PB in 6,185 hours! That is a phenomenal amount of writes, which appears to be way over spec of 20GB of host writes per day for a min of 5 years.

Here is http://botchyworld.iinaa.net/ssd_x25v.htm another one 0.86PB in 7,224 hours!

Does that come down to the work load or are Intel specs extremely conservative?

[idata]

From what I heard, the rated P/E cycles are conservative.....

Google Translate does a pretty choppy job translating. Let me ask Intel if they are willing to donate one for testing?

[idata]

redux wrote:

Can this be true?

http://translate.google.com/translate?hl=en&sl=zh-CN&u=http://www.pceva.com.cn/html/2011/storgetest_... This site experimented to see how much data could be written to an X25-V before the NAND expired. They wrote to the device 24/7. (Seems they paused once every 12 hour to run TRIM from the toolbox).

Translation makes it hard to understand exactly how they ran the experiment, but they state:

...

In total there were able to achieve 0.73PB in 6,185 hours! That is a phenomenal amount of writes, which appears to be way over spec of 20GB of host writes per day for a min of 5 years.

Here is http://botchyworld.iinaa.net/ssd_x25v.htm another one 0.86PB in 7,224 hours!

Does that come down to the work load or are Intel specs extremely conservative?

If anyone wonders, it's the same SSD, same serial# .

I'm about to start such a test using a rebranded X25-V, pending a fellow members decision at XS to tag alomg I'll do sequential writing only, if not I'll make it a mixed test.

Although I have high hopes reproducing the result we should all acknowledge that SSDs aren't created equal, a bit of the same as with OCing, some perform great and some not.

[idata]

Great!

A mix of random and sequential would be more representative of real life. 4K, 8K, 32K & 64K & 1MB are the most common writes sizes I have observed, but I'm sure Intel have a wealth of information on typical usage patterns that you might find more represenative.

Would you be able to post weekly updates on how the experiment progresses? Maybe run two tests in parallel with different SSD's from different batches?

[idata]

XS is running an experiment now. X25-V 40GB vs 320 Series 40GB (34nm vs 25nm)

http://www.xtremesystems.org/forums/showthread.php?t=271063 http://www.xtremesystems.org/forums/showthread.php?t=271063