|OCZ Vertex SSD RAID-0 Performance|
|Reviews - Featured Reviews: Storage|
|Written by Olin Coles|
|Friday, 03 April 2009|
Page 8 of 14
EVEREST Disk Benchmark
EDITORS NOTE 05/10/2009: Benchmark Reviews has re-tested the OCZ Vertex with the latest v1.10 firmware, which includes TRIM support, and the resulting performance was generally identical to the previous firmware. Please remember that TRIM is a Windows 7 supported feature, and does not improve performance on Windows XP or Vista Operating Systesm.
Many enthusiasts are familiar with the EVEREST benchmark suite by Lavalys, but very few are aware of the Disk Benchmark tool available inside the program. The EVEREST Disk Benchmark (version 2.06.37) performs linear read and write bandwidth tests on each drive, and can be configured to use file chunk sizes up to 1MB (which speeds up testing and minimizes jitter in the waveform). Because of the full sector-by-sector nature of linear testing, Benchmark Reviews endorses this method for testing SSD products, as detailed in our Solid State Drive Benchmark Performance Testing article.
The SSD products tested with EVEREST Disk Benchmark are connected to the Intel ICH10R SATA controller resident on the Gigabyte GA-EX58-UD4P motherboard. Using the 1MB block size, our read performance measured an average 247.3 MBps and forms a near-perfect line as it scans across all sectors. At some point in the waveform, maximum read performance peaked at 249.7 MBps, indicating how well the Indilinx 'Barefoot' controller has improved over the previous designs by other manufacturers (like JMicron).
Linear disk benchmarks are superior tools in my opinion, because they scan from the first physical sector to the last. A side effect of many linear write-performance test tools is that the data is erased as it writes to every sector on the drive. Normally this isn't an issue, but it has been shown that partition tables will occasionally play a role in overall performance. The large 64MB buffer helped our linear testing, as shown in the waveform chart below.
Although the chart makes the linear write performance appear unsteady, the results seen here are actually very good compared to other SSD products we've tested in the past. Read-from performance was a speedy 247.3 MBps on averate, with 249.7 MBps maximum. The OCZ Vertex easily outperforms the stated 160 MBps specification for write-to bandwidth, as our tests resulted in a 225.2 MBps average with a 242.7 MBps maximum peak write bandwidth. Let's move on to the RAID-0 Vertex results...
The single-SSD OCZ Vertex results were already impressive, with 247.3 MBps average read speed and 225.2 MBps write bandwidth. Putting two OCZ Vertex SSDs into a striped RAID-0 array really let the technology shine, as the bandwidth scores were as high as Benchmark Reviews has seen. The RAID-0 Vertex set performed at 504.9 MBps average read speed, while write performance was 437.2 MBps. That amounts to 104% read speed improvement, and 94% write performance.
The chart below shows the average linear read and write bandwidth for a cross-section of drives attached to the Intel ICH10 Southbridge. I personally consider this the single most important comparison of storage drive products, and although the Apex SSD is a bit crippled by the complex RAID-0 write-to performance, all of the others are spot-on.
Linear bandwidth certainly benefits the Solid State Drive, since there's very little fluctuation in transfer speed. Hard Disk Drive products decline in performance as the spindle reaches the inner-most sectors on the magnetic platter.
In the next section, Benchmark Reviews tests the buffered transaction performance for the OCZ Vertex SSD using HD-Tach, and compare the results to dozens of other products.