[ale] X25 G3 Lifespan and Performance (was Re: LAMP performance)

[Pat Regan]

On Mon, 13 Sep 2010 17:25:38 -0400
Greg Freemyer <greg.freemyer at gmail.com> wrote:

> I don't know enough about how logical sectors are mapped to EBs to
> calculate the lifetime writes achievable in a good SSD like an Intel.
> It may depend on the exact number of sectors being written per write,
> etc.

A friend of mine sent me a link today that made me think of this
thread:

http://www.anandtech.com/show/3965/intels-3rd-generation-x25m-ssd-specs-revealed

It looks like the generation 3 X25-M is going to be able to survive
about four times as many writes as the current generation 2 drives.
According to these tables the current X25-M should be good for 3 years
at about 7 GB worth of random 4KB writes per day.

Do you think I'm safe to assume that larger writes are better optimized
and will lead to even longer life?

I'm surprised the X25-E is now mostly being surpassed by the X25-M on
the performance side (5K vs 40K write IOPS).  I knew the -E drives were
sturdier, but this is the first time I've seen the numbers for the write
lifespan of the -E and -M drives compared like that (7.5TB vs 1PB).

Pat