AIDA64 Disk Benchmark
Many enthusiasts are familiar with the Finalwire AIDA64 benchmark suite, but very few are aware of the Disk Benchmark tool available inside the program. The AIDA64 Disk Benchmark 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. One of the advantages SSDs have over traditional spinning-platter hard disks is much more consistent bandwidth: hard disk bandwidth drops off as the capacity draws linear read/write speed down into the inner-portion of the disk platter. AIDA64 Disk Benchmark does not require a partition to be present for testing, so all of our benchmarks are completed prior to drive formatting.
Linear disk benchmarks are superior bandwidth speed tools because they scan from the first physical sector to the last. A side affect 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 table alignment will occasionally play a role in overall SSD performance (HDDs don’t suffer this problem).
240GB MDS7-BP5e-0256G SSD Read Results
We run the AIDA64 linear read and write tests with a 1M block size. Charted above, read performance on the 240GB MyDigitalDiscount BP5e SSD returned average speeds of 510.1MB/s. Performance picks up slightly after the first 10% of the drive is read.
AIDA64 linear write-to tests were next…
240GB MyDigitalDiscount BP5e SSD Write Results
And…boom. The BP5e returns the lowest sustained write result in this benchmark that we’ve ever seen, at a paltry 96.7MB/s average. There are many hard disks that are faster than this in sustained writes.
This huge drop in write performance is typical of TLC (triple level cell) SSDs, and I’ll discuss it some more in the Final Thoughts section of this review.
The chart below shows the average linear read and write bandwidth speeds for a cross-section of storage devices tested with AIDA64. The MyDigitalDiscount SSD returns excellent linear read speeds, which at 510MB/s are just a few percentage points below the all-time high of 517MB/s, but the linear write speeds are at the very bottom of the pack.
Linear tests are an important tool for comparing bandwidth speed between storage products, serve to highlight the consistent-bandwidth advantages of SSDs, which don’t suffer the performance drop-off that HDDs do as the test proceeds away from the fast outer edge of the disk.
In the next section we use PCMark Vantage to test real-world performance…