Write 7GB a day and your 25nm SSD will be dead in a millennium

Subject: Storage | February 18, 2011 - 04:23 PM |
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AnandTech went straight after the rumour mongers with a bit of math, showing that even though the number of times you can program/erase one flash block is cut almost in half compared to previous generations you are not going to see the drive die because of flash exhaustion.  You may see controllers fail or even see the flash memory's charge drain but the read/write error won't be the likely cause.  Check out his review of the OCZ Vertex 3 Pro with the new SandForce 2582 controller.


"If I never install another application and just go about my business, my drive has 203.4GB of space

to spread out those 7GB of writes per day. That means in roughly 29 days my SSD, if it wear levels

perfectly, I will have written to every single available flash block on my drive. Tack on another 7

days if the drive is smart enough to move my static data around to wear level even more properly. So

we're at approximately 36 days before I exhaust one out of my ~10,000 write cycles. Multiply that out

and it would take 360,000 days of using my machine for all of my NAND to wear out; once again,

assuming perfect wear leveling. That's 986 years. Your NAND flash cells will actually lose their

charge well before that time comes, in about 10 years."

Here are some more Storage reviews from around the web:

Click Here to go to Storage  Storage

Source: AnandTech

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