Re: [smartmontools-support] Confused monitoring my SSD's health

[Dan L. <da...@ob...>]

On 06/10/14 13:29, Sylvain Utard:
> reading the "Media Wearout Indicator" paragraph: the sentence "Declines linearly from 100 to 1 a [...] Once the normalized value reaches 1, the number will not  decrease, although it is likely that significant additional wear can be put on the device." makes me thing even Intel is not able to detect anything :) Am I interpreting that correctly?

There is an expected/estimated lifetime. The "Media Wearout Indicator" 
show the amount of such lifetime passed. Of course "estimated lifetime 
is over" doesn't mean the real particular piece of device will cease to 
work, so there may be some unknown amount of 'bonus' lifetime beyond it.

So, you may interpret is either as "intel is able to estimate 'casual' 
lifetime, but there may be additional bonus lifetime" or "intel can't 
predict real lifetime". Different wording, almost same meaning.

> Regarding the "Re-allocated Sector Count", do you confirm that having a non-zero RAW VALUE (from specs: the number of retired blocks since leaving the factory) is not a big deal?

I can confirm that this attribute show number of retired blocks since 
leaving the factory.

But you are curious about interpretation of such value in the context of 
overall drive's health instead. I can confirm nothing here.

So, in my humble opinion ...

... change of such number is more important than absolute value. But it 
doesn't mean that absolute value is meaningless at all. There is no 
defined causality between this value and drive's health. We can estimate 
only.


Dan


>> Fortunately, Intel disclosed required information for S3500 model. Did you read the product specification ?
>>> http://www.intel.com/content/dam/www/public/us/en/documents/product-specifications/ssd-dc-s3500-spec.pdf
>>
>> Information you are interested in are available in chapter 5.4.