vurbo.blogg.se - Testing ssd drives

One of them is the Solid State Storage (SSS) Performance Test Specification (PTS). The Storage Networking Industry Association (SNIA) is an organization that develops various standards for the storage industry. Because of that, it is important to perform tests of different devices applying same workload to those SSDs. In that case, all differences in write history may produce different test results. It also means that it isn’t sufficient to simply write some data to the SSD and then perform tests because we never know the internal state of the flash memory, and also how the whole device will behave. This makes it hard to say how a particular product will behave without detailed tests.

Moreover, the exact garbage collection algorithms and SSD controller management of flash memory is known only to the manufacturers. If tests are performed on a device that is brand-new (fresh from the box – with all pages clear), performance results will be much better. When an SSD has some free pages, it can operate faster because it doesn’t have to perform the garbage collection.

Basics of SSD Performance Tests : Garbage collectionĪs I explained in the previous articles of this series, SSDs will show different performance levels, depending on the write history.

Basics of SSD Performance Tests : Recap on flash memory.

In case you somehow missed the previous parts, you can catch up here: Talking about numbers – read the third part of our SSD series! In this article we’re raising the issue of testing the performance, what does it mean to purge the SSD and why it is necessary to run preconditioning, as well as what follows the preconditioning.

Make your SSD Performance tests easy as one-two-three. Basics of SSD Performance Tests : Test, filter, precondition