I have an OCZ-ARC100 240GB SSD in a home server that stores video from cameras, and this is all it holds. It stores the most recent 2-3 weeks of video, so one could safely say that every 2-3 weeks I'm writing 240GB to it. Let's assume 3 weeks as a conservative estimate.
This drive has been in this system for 6 months so that's 24 weeks, completely rewritten every 3 weeks, or about 2TB written. In reality, it's probably more because the camera bitrates were higher at one time, but anyway, it doesn't change much. Based on the amount of video files being written per day per the 'du' command, about 10GB/day is being written which coincides with my estimate.
I'm running Unbuntu and have been using smartctl to keep an eye on the drives as a curiosity. The Media Wearout Indicator recently dropped from 100 to 99. What is interesting is why it's not dropping faster. The endurance rating for this drive is 20GB/day for 3 years which works out to approx. 20TB. Since I've written about 2TB already, the wearout should be more like 10%, not 1%. If I trust the indicator, 1% every 6 months means this drive should last 50 years and have an endurance rating of 10 times what they claim, or 200TB.
Now, if my calculations were off by 10, 20, 50 percent, fine. But 10X?! It seems obvious that the indicator would be based on the OEM's own endurance rating, but clearly it's not.
This drive has been in this system for 6 months so that's 24 weeks, completely rewritten every 3 weeks, or about 2TB written. In reality, it's probably more because the camera bitrates were higher at one time, but anyway, it doesn't change much. Based on the amount of video files being written per day per the 'du' command, about 10GB/day is being written which coincides with my estimate.
I'm running Unbuntu and have been using smartctl to keep an eye on the drives as a curiosity. The Media Wearout Indicator recently dropped from 100 to 99. What is interesting is why it's not dropping faster. The endurance rating for this drive is 20GB/day for 3 years which works out to approx. 20TB. Since I've written about 2TB already, the wearout should be more like 10%, not 1%. If I trust the indicator, 1% every 6 months means this drive should last 50 years and have an endurance rating of 10 times what they claim, or 200TB.
Now, if my calculations were off by 10, 20, 50 percent, fine. But 10X?! It seems obvious that the indicator would be based on the OEM's own endurance rating, but clearly it's not.
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