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jbket1487
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SSD life expectancy

Sun Sep 08, 2019 8:37 am

I think you should start including SSD life expectancy in your reviews. This is especially true for NAS, home or business. Using SSD caching in a NAS, the life expectancy can vary quite a bit depending on which drive you use. Thanks for all the great work you do. Just one more thing. You need to update the recommendation section. Some of it is very dated.
 
Waco
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Re: SSD life expectancy

Tue Sep 10, 2019 12:24 pm

It depends 100% on your workload. Drives are rated based on total data written and/or drive writes per day.
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defaultluser
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Re: SSD life expectancy

Tue Sep 10, 2019 2:08 pm

They already did a lifetime test on SSDs up to TLC:

https://techreport.com/review/27909/the ... -all-dead/

All these drives lasted BEYOND 500TB writes, even early TLC drives. at 256GB/drive, that means ALMOST 2,000 complete drive writes.

Even if you're writing the entire drive once a day, that still buys you OVER FIVE YEARS of life.

Typical drive writes of a highly-loaded desktops are 1/4 write to 1/2 of the drive write per-day, so your endurance goes up to ten to twenty years.

Since I stopped buying OCZ SSDs, I've never had an SSD fail in use - they've all been upgraded before death.

The memory is incredibly reliable (as long as you don't buy the lowest-priced drive you can find), an the only issues you will typically encounter are other quality control problems.
 
Usacomp2k3
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Re: SSD life expectancy

Tue Sep 10, 2019 2:15 pm

I will caveat is that we have no idea about mid/long term data retention, whether hot or cold.
 
Krogoth
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Re: SSD life expectancy

Tue Sep 10, 2019 3:34 pm

Older flash memory is able to hold its data for a couple of year in cold storage. I'm not sure how current generation will fare and there is insufficient data on the matter.
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defaultluser
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Re: SSD life expectancy

Wed Sep 11, 2019 4:07 pm

Krogoth wrote:
Older flash memory is able to hold its data for a couple of year in cold storage. I'm not sure how current generation will fare and there is insufficient data on the matter.


Well yes that is why I only use SSD for installed drives. For anything external, I use HDD for better powered-off lifetime.

As a consumer, you won't have to worry about this issue for another five years, but it's true that external SSDs are getting closer to price/capacity on hard disks, so it will be our problem soon.

you get the maximum powered-down time by writing hot and storing cold, but we will need real-world reviews to better characterize HOW LONG we are talking.
 
meerkt
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Re: SSD life expectancy

Wed Sep 11, 2019 10:07 pm

I'm also curious about early-generation devices with firmware stored on flash rather than EEPROM.
It's likely SLC, maybe NOR, but I do wonder if at some point we're going to start seeing more and more devices that just stop working because of that.

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