On Fri, Sep 16, 2011 at 02:45:28PM -0400, Liyun Yu wrote:
> Thanks David, it is good to know this.
> 
> One of our team members suggested that the SSD also tend to be
> wear out every 12-16 months. I was puzzled by that statement since
> I never know if the RAM or other chip-based memory device would be
> wear out electronically. That is another topic maybe.

I've heard this as well... but in my experience, SSDs fail like disks,
not like tires, which is to say, the failure pattern seems fairly random,
and more correlated to age than to use.   I didn't stick around the 
employer with thousands of SSDs in production to tell, but for the short 
time I was there, I saw something that looked a lot like the begining of 
the regular bathtub curve of hard drive failures.  

Of course, these were very early 'enterprise' SSD, so I imagine things
are different now...  But my point is that yeah, SSDs fail, but so do
hard drives.   Seems to me like you should solve the problem of SSD
failures the same way you solve the problem of hard drive failures;
you mirror two different SSDs from different lots, and you replace the
things when they fail.    

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