SSD Disk Allocation Size Test

Once every couple of years or so Microsoft provides me with a new laptop. This time around it was a Lenovo W510 with a quad proc (8x if you count Hyper-Threading) with 16 GB of RAM. Although the machine came with a standard 7200 RPM drive I already had two SSD drives which I plopped into the machine within minutes. Because I was moving data around and wanted to optimize things if I could on disk I wanted to look at the allocation size I used to format the SSD drives to see if I could not eek out any additional performance. Using the secondary drive as my test I formatted the OCZ 120 GB drive using the minimum, default, and maximum allocation sizes available.

I then used the ATTO Disk Benchmark tool to test each configuration. As you can see there is really no major deviations between the 3 however the 512 byte allocation size doesn’t kick as much on the low to mid end. As for the larger allocation size I saw nothing that was compelling enough to make that move especially given the slack space tax I would be paying for that configuration when smaller files are stored on disk. So in the end I went with the default allocation size for my SSD drives.

512 bytes (min) 4096 bytes (default) 64k bytes (max)

4 thoughts on “SSD Disk Allocation Size Test

  1. I definitely enjoyed the review, however, I think your pics are labeled wrong. If I click on them, the allocation size does not match up with the image’s heading or the name of the image.

    Thanks for the review, it’s going to save me time ;P


  2. First of all, I would like to appreciate the effort that you have put in making such an informative blog. I enjoyed this post of yours and I must say that everytime I come back to your blog, I always have something new and informative to read. Thanks for keeping me updated.


  3. While I think this information is very important, don’t rely on it as the only fact. Use the power of the internet to search for more relevant pieces, as having a wide array of knowledge is always good.


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