We proceed with the AS SSD benchmark, which contains five synthetic as well as three practical tests. The synthetic tests determine the sequential and the random read / write performance of an SSD. These tests are carried out without using the operating system's cache. The Seq-test measures how long it takes to read and write an 1GB file. Most importantly, this sequential benchmark uses incompressible data for all of its transfers.

The 4K benchmark tests the read and write performance for random 4K blocks. The 4K-64-THRD-test corresponds to the 4K procedure except that here the read and write operations are distributed on 64 threads:

The Vector's performance in sequential reading with incompressible data was great (516.47 MB/s), ranking first in the graph you see below. Sequential writing was also fast but slower that the Vertex 4 and the Agility 4 SSDs:

At the 4K random reading tests, the Vector took the second place in the rank with a very high 25.7 MB/s:

The drive was also fast in 4K random writing tests with 78MB/s:

Multithreaded requests for random reading of 4K incompressible files are always more demanding for SSDs. However, the Vector drive excels and easily ranks first in the charts below, in both read and write tests:

In the following graph you see how the OCZ Vector 256GB drive reads and writes files, which have been partially of fully compressed. It is obvious that the drive's reading and writing performance is steady with all kind of data: