Question Some doubts about the health % of my SA400

[marmalade24]

I'm starting to have second thoughts about whether the health is calculated properly on my Kingston SA400 SSD. I have the 240 GB model which has a TBW of 80TB. Even though I've written over 22 TB (which is more than 27% of the advertised TBW) it's been stuck at 80% for a while. Are there other parameters included in this calculation I'm missing?

Now, I'm aware reaching the TBW doesn't mean the SSD is going to die immediately. I always make backups anyway. Just wanted to, hopefully, hear some feedback.

Thank you!

 

[fzabkar]

The drive's firmware is probably using the average P/E cycles as the wear/health indicator.

 

[marmalade24]

That makes sense. Thanks!

 

[fzabkar]

https://www.ittsb.eu/forum/index.php?action=dlattach;topic=1634.0;attach=10535

Check the Erase Count and SSD Wear Indicator attributes.

 

[marmalade24]

SSD Wear Indicator is at 80; Average, Max and Total Erase Count values are 207, 245 and 88391, respectively. Everything in decimal values.

For reference, drive's a little over three years old and has been powered on for 15,000+ hours.

 

[fzabkar]

It appears that the SSD is rated for 1000 P/E cycles.

An average of 207 P/E cycles represents 20.7%, so the SSD Wear Indicator attribute would be sitting at 79.3% health (= 100 - 20.7). That matches the figure of 80.

 

[marmalade24]

Sounds about right. Thank you for the answer!