CCSIO Benchmark

CCSIO Benchmark (short for Cold-cache Sequential I/O Benchmark) is a simplistic yet useful utility that helps you accurate determine the maximum speed you can read or write bulky files to and from various locations.

Capable, little benchmark utility that does not require installation

What's more, this featherweight utility can also be employed to help determine the read/write performance of systems running on shared remote drives and even virtual devices (encrypted file containers and RAM disks).
The application does not require installation, nor does it need full administrative rights to do its job. Just download it and launch it directly via its executable file.

Test the read/write capabilities of your computer's disks

Once launched, you are met by a compact main window and a clear-cut UI that provides you with various details such as the file system type, the device's details, controller and the host OS. A single benchmark consists out of a total of 300 tests (180 read tests and 120 read tests), and each test takes about 1 second to completed.
Considering that tests with buffer spaces in excess of the 64 MB limit are automatically skipped, a complete benchmark should not take more than 5-6 minutes.

Provides you with multiple ways of analyzing test data

Once a benchmark test is completed, you can view the results (read and write speeds) within their designated sections, displayed as graphs, on the lower part of the main window. There's also a raw data mode, which, as its name clearly suggests, offers a more pragmatic and thorough view of all the benchmark details.
For your convenience, the application also makes it possible for you to view tests reports, save the reports or share screenshots with the visible results.

Simplistic and widely-accessible cold-cache I/O benchmark utility

Taking everything into account, CCSIO Benchmark proves itself to be a fairly well thought-out utility, capable of helping you accurately measure how fast does your computer's disks (volumes) can actually read and write very large files, without anything more than a few mouse clicks.