The first real-life test is our HTPC scenario. This market can be as volatile as the prices of oil, and thus the end products that we buy can experience very similar fluctuations in price. The portion of the user capacity which is free from user data either already TRIMed or never written in the first place will look the same as over-provisioning space until the user saves new data to the SSD.
The reason is as the data is written, the entire block is filled sequentially with data related to the same file. This combats TLC endurance concerns.
Sequential read measured 2. Our second real-life test covers disk activity in a productivity scenario. This is why the storage industry created the TRIM command. One free tool that is commonly referenced in the industry is called HDDerase.
This is an important consideration when you start to look beyond performance enhancements and instead at bug fixes, where a third party controller manufacturer might not have the same priorities as the SSD vendor. This test copies an ISO two large filesprogram many small files and game small and large filesreturning the speed and duration of each.
The key is to find an optimum algorithm which maximizes them both. The reason is as the data is written, the entire block is filled sequentially with data related to the same file. This is where great random write speeds make a big difference in the "snappiness" of the SSD.
Peak latency times were also excellent, measuring Once that is removed you are greeted with the underside of the circuit board, which in this case only includes NAND pieces. Normally I do these posts when a new video card dropsbut this news was a pretty big deal: What does affect performance is the entropy of the data, provided the SSD is using a flash controller that supports a data reduction technology, such as a SandForce Flash Controller.
For all intents and purposes this test shows drive performance under normal daily activity for most users. OCZ lists an idle power consumption of 1. This unclaimed space will automatically be used by the controller as dynamic over-provisioning.
This tool can be configured to benchmark a number of things.
All free space not consumed by the user becomes available to hold whatever the SSD believes is valid data. With highly compressible, repeating data, the drive was able to read at DuraWrite has been further advanced to decrease Write Amplification Factor data written to the drivewhich reduces the stress placed on the NAND cells.
Our second real-life test covers disk activity in a productivity scenario. Unfortunately, the process to evenly distribute writes requires data previously written and not changing cold data to be moved, so that data which are changing more frequently hot data can be written into those blocks.
Sep 10, · I know the units based on SF-2XXX get all the attention for now, but there a strange issue going on with units based on SF-1XXX, where units that have been rock solid for a long time simply start presenting problems.
This morning, SandForce officially releases their SF series processors to manufacturers which are capable of parallel transfer speeds of MB/s read and write.
It is hard to believe that SandForce only opened their doors just over a year ago and their impact has changed the way we are looking. Jan 24, · There are two issues with the Sandforce controller 1) it's a compression controller.
To get its numbers it compresses the data on the fly.
Fine, except not all data is compressable and that slows down things a ton. That Marvell that was quoted gets its numbers from uncompressed data.
It's far. The new Corsair Force GT SSDs will use the SF processor. to read and write data with the same speeds due to a low write amplification rate, according to Smith. IT and enterprise.
Measuring boot time is one of the best illustrations of how an SSD benefits your computing experience. You get a mix of random and sequential reads, along with some write operations attributable.
The SandForce SF series has become the unicorn of the SSD industry. For the past two years there has been a lot of hype about the new controller, but Seagate/SandForce has kept missing.Write amplification sand force sf 2281 issues