HD Tune Pro 5.00:
Next, I ran a series of tests using HD Tune Pro. This hard disk utility measures a drive's performance by testing its sequential read and write speeds as well as its access time, burst rate and CPU usage. For this review, I used it to benchmark the diskAshur PRO2's random read and write speeds, random access times and the number of operations per second.
 Read Benchmark - USB 3.1 |
 Read Benchmark - USB 2.0 |
 Write Benchmark - USB 3.1 |
 Write Benchmark - USB 2.0 |
Once again, the diskAshur PRO2 performed fairly well when connected to the computer's USB 3.1 port. The drive had average read and write speeds of 103.4 MB/s and 98.9 MB/s, respectively, and a burst rate of 224.5 MB/s when reading.
 Random Access Read - USB 3.1 |
 Random Access Read - USB 2.0 |
 Random Access Write - USB 3.1 |
 Random Access Write - USB 2.0 |
Using USB 3.1 didn't have nearly as big of an effect on the diskAshur PRO2's random read and write performance. Nevertheless, the IOPS and average speeds were, in most cases, higher than what we saw when the drive was connected to a USB 2.0 port.
"Real World" Benchmark:
To test the "real world" performance of iStorage's diskAshur PRO2 hard drive, I copied and pasted 1GB worth of randomly generated files and directories. All of the files are between 1KB and 95MB in size and no more than five directories deep. To see how well the drive handled large files, I also copied and pasted a 4GB ISO file.
| 1GB of Files | 4GB ISO File | |
| Write: | 23 seconds | 33 seconds |
| Read: | 10 seconds | 32 seconds |
The diskAshur PRO2 performed fairly well here, taking 23 seconds to write 1GB worth of test data and 10 seconds to read it back.
