Re: Intel SSD data loss: Any possible way this is user / software error?

[Eric Sandeen <sandeen@redhat.com>]

Evan Jones wrote:
> On Aug 13, 2010, at 7:57 , Eric Sandeen wrote:
>> Just out of curiosity, what do you see when the write cache is on?
>> Seems counter-intuitive that it'd work better, but talking w/
>> Ric Wheeler, he was curious... maybe Intel didn't test with the
>> write cache off?
> 
> Data loss is much easier to trigger with the write cache on. It happens
> to me on the first try. With the write cache off, I've only been able to
> get it to occur with large writes (64 kB or larger), and only about once
> every 3 times.

Ok, so working as expected then, really.

...

>> Also, would you be willing to publish the test you're using?
> 
> The programs I have been using are here (but see below):
> 
> http://people.csail.mit.edu/evanj/hg/index.cgi/hstore/file/tip/logging/minlogcrash.c
> 
> http://people.csail.mit.edu/evanj/hg/index.cgi/hstore/file/tip/logging/logfilecrashserver.cc

Cool, thanks for publishing all that info, a few people have done 
power loss testing, always interesting to see what's been put together.

I'll take a closer look at some point...

-Eric