6. Benchmarks - page 4
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.
As we previously saw, the Marvell -based Crucial Adrenaline SSD is very fast in the sequential reading with incompressible files, leaving the Sandforce-based OCZ Synapse behind:
Crucial's SSD was also fast in the seq writing tests:
In the 4K random reading test the Adrenaline SSD was not as fast as the OCZ Synapse, although the performance gap is small:
The 4K random writing test left the Adrenaline SSD behind OCZ's Synapse:
The Adrenaline SSD takes the lead again in the 4K random read (64 thread) writing and reading tests:
In the following test, the Crucial Adrenaline 50GB SSD is reading and writing files, which have been partially of fully compressed. As it was expected , the more the drive returned a solid performance with all files: