Google| Subject | Re: Paintshop and Corel |
| From | Mark Sieving |
| Date | 12/02/2013 23:41 (12/02/2013 14:41) |
| Message-ID | <423c0652-df7c-4d5d-b07d-fab40a838d14@googlegroups.com> |
| Client | |
| Newsgroups | rec.photo.digital |
| Follows | David Taylor |
| Followups | David Taylor (10h & 44m) |
On Monday, December 2, 2013 1:06:47 PM UTC-6, David Taylor wrote:
David TaylorI came across a test of the Samsung SSD 840 250GB TLC: http://tinyurl.com/mgxam7r
An SSD fails sooner if it is used more, because of the finite number of write cycles each cell has. I would not trust any guarantee which did not specify the net data write in some way or other.
Their conclusion:
"So let's calculate the lifespan. We consider the first uncorrectable error to be the end of the SSD. For the first one that was after 764 TiB of written data, and for the second one that was after 768 TiB of written data. That the two failed so close together could indicate that the lifespan of the Samsung 840 SSDs is fairly constant. However, two SSDs aren't representative of the thousands that are out there.
"If we take the 764 TiB and an average of 10 GiB of writes per day, we arrive at a lifespan of 214 years. Keep in mind that we sequentially write and fill the SSD which gives us write amplification factor of only 1.04 or 1.05. That's the difference between the write commands sent to the SSD and the writes executed by the SSD internally. The general assumption is a WAF of around 3.0 for normal consumer use with SSDs that don't employ compression tricks. That translates to a lifespan of 75 years. Even when you push an SSD to the max by downloading lots of movies everyday up to an average of 30 GiB per day, the SSD will still last you 24 years. No matter how you use it, it will last longer than the period you plan on using it (most people like to add more capacity after a certain time). A functional lifespan of 10 years is already unusually high for a storage medium."
As they note, a sample of two drives is not conclusive, but the indication is that the drives will probably last far longer than anyone would require.
11/16/2013-
