Understanding SSD Endurance (DWPD & TBW) and Recommendations for S2D
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Found a good article that explains it well: https://blogs.technet.microsoft.com/filecab/2017/08/11/understanding-dwpd-tbw/
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That was really good to read! my shows as below. The command needs to be run as administrator.
PS C:\WINDOWS\system32> Get-PhysicalDisk | Get-StorageReliabilityCounter | Select Wear
Mine is
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@tim_g said in Understanding SSD Endurance (DWPD & TBW) and Recommendations for S2D:
https://blogs.technet.microsoft.com/filecab/2017/08/11/understanding-dwpd-tbw/
The problem is it isn't really a % what reported. And it's a VERY bold estimation to thinking "I got 5% in 2 years so I have 19 more years" is WRONG. It doest work the way guys @ MSFT are telling. 5 can jump to 90% very fast - it's a function of a workload fragmentation.
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@kooler said in Understanding SSD Endurance (DWPD & TBW) and Recommendations for S2D:
@tim_g said in Understanding SSD Endurance (DWPD & TBW) and Recommendations for S2D:
https://blogs.technet.microsoft.com/filecab/2017/08/11/understanding-dwpd-tbw/
The problem is it isn't really a % what reported. And it's a VERY bold estimation to thinking "I got 5% in 2 years so I have 19 more years" is WRONG. It doest work the way guys @ MSFT are telling. 5 can jump to 90% very fast - it's a function of a workload fragmentation.
It works the same way with anything.
If you buy new tires for your car, and they only have 4% wear after 5 months... then you spend a day of doing donuts and racing, you just increased the wear to 74% in a single day. (extreme example, but principle is the same)
That percentage is based off of the wear of memory cells. At 100%, all memory cells in the drive are unusable.
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Well my drive is reporting nothing - after 5+ months, it's still at zero.
That seems unlikely how often I download large IOSs and delete, etc.
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@dashrender said in Understanding SSD Endurance (DWPD & TBW) and Recommendations for S2D:
Well my drive is reporting nothing - after 5+ months, it's still at zero.
That seems unlikely how often I download large IOSs and delete, etc.
It all depends. What's the make/model?
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@dashrender said in Understanding SSD Endurance (DWPD & TBW) and Recommendations for S2D:
Well my drive is reporting nothing - after 5+ months, it's still at zero.
That seems unlikely how often I download large IOSs and delete, etc.
Downloading an ISO regularly does very, very little for wear and tear. What really gets you there are things like databases that are writing continuously.
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@dashrender said in Understanding SSD Endurance (DWPD & TBW) and Recommendations for S2D:
Well my drive is reporting nothing - after 5+ months, it's still at zero.
That seems unlikely how often I download large IOSs and delete, etc.
I'm not sure what you'll get if your drive doesn't support accurate reporting... 0 or blank. Anyone know?
I've got two SSDs in my laptop right now, and both are over a year old. This is what I'm showing... they aren't in order for some reason.
Disk 0 = LiteOn SSD
Disk 1 = Samsung SSD
Disk 2 = WD Elements HDD
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My current desktop has an SSD and an HDD:
The wear when is not supported is on 0, my HDD Is marked as 0.
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It also completely ignores what DWPD is often a proxy for. Write latency consistency. A drive with .3DWPD MIGHT be good enough for your endurance requirements but might also completely implode on performance if all your writes are done within a short period of time and the application has end users accessing it.
