JDiskMark is a powerful and versatile disk benchmarking tool written in Java, designed to help you accurately measure the performance of your storage devices across different operating systems. Whether you're testing HDDs, SSDs, or network drives, JDiskMark provides reliable insights into your disk's read and write speeds.
ubuntu/debian installer:
https://sourceforge.net/projects/jdiskmark/files/jdiskmark_0.6.3_amd64.deb/download
rhel / fedora...