Performance testing the new Accelsior E2 simply consisted of testing the eSATA transfer speeds alone, both in system and Helios to make sure they matched which they did. Detailed performance of the Accelsior alone is available in our Accelsior Review, just as PCIe performance, via Thunderbolt, is available in the OWC Helios review. For our tests, we used two Intel DC S3700 800GB SSDs in RAID 0, both of which we had reviewed previously as well.
ATTO Disk Benchmark is perhaps one of the oldest benchmarks going and is definitely the main staple for manufacturer performance specifications. ATTO uses RAW or compressible data and, for our benchmarks, we use a set length of 256mb and test both the read and write performance of various transfer sizes ranging from 0.5 to 8192kb. Manufacturers prefer this method of testing as it deals with raw (compressible) data rather than random (includes incompressible data) which, although more realistic, results in lower performance results.
RAID 0 performance of 783MB/s read and 761MB/s write is an excellent start and was unexpected through eSATA to say the least.
Crystal Disk Benchmark is used to measure read and write performance through sampling of raw (0/1 Fill/compressible) or random data which is, for the most part, incompressible. Although both are very close, we provide compressible results on the left with incompressible on the right below:
Typically, we might see lower test results in Crystal Diskmark, however, these are a bit lower than expected. This could be a result of the storage medium used which has quite a few hours of testing under their belt (Intel SSDs).
We elected to conduct Anvil Storage testing with 100% incompressible data just to give all a good look at the Accelsior at its best. Full identification of the system and drives in use is available on the bottom left and right of the result.