![]() ![]() ![]() The test usually takes less than a minute, depending on your settings of course, but keep in mind that it’s recommended to avoid working on the system during this period.ĭisk Speed Test shows writing information, including time, speed and the number of blocks, in a dedicated panel in the main window, with a special option to draw a graph and let you analyze the performance of the selected drive. There’s not much to configure after launching the program for the first time, but you’re still allowed to choose the temporary file name that’s supposed to store all information, the file and the buffer size. The results of various tests are included in the the repository.Determining the speed of a hard-disk is more like a job addressed to beginners, but Disk Speed Test promises to make everything a lot easier even for beginners.Įspecially designed to serve the purpose of measuring the speed of your drives, Disk Speed Test relies on what can very well be considered a minimal interface, with all features grouped right in the main window. I wrote this tool to help troubleshoot poor SMB performance on Unraid, specifically concurrent writes or concurrent reads and writes.Īfter many tests I came to the conclusion that the performance degradation is caused by the Unraid User Share FUSE code. The DiskSpd -Zr option is used to randomize data in every write block, this adds some test overhead, but mostly prevents LZ4 from compressing the data and writing less IO than requested.This will mostly eliminate the benefits of LZ4 during reads, and test actual IO. Instead of using DiskSpd -c to create the test file, the file is created and filled with random data such that the allocated size on disk is near identical to the logical size.For read testing the read should result in disk IO, not just decompression, as may happen with sparse files or highly compressible content.For write testing on COW filesystems there is no point in pre-filling the file as all writes are in new blocks, but the same file is used for the read tests.The default DiskSpd -c command used to create test target files creates semi-sparse files on ZFS with LZ4 compression, e.g.Special considerations are made for COW and compressing filesystems, like ZFS with LZ4:.Test results will differ between running elevated or not, do not mix test results. DiskSpd will use privileged IO functions when running elevated.DiskSpd can be destructive, especially when running elevated, use at your own risk.UTC, Target, FileSize, FolderDepth, FoldersPerFolder, FilesPerFolder, FolderCount, FileCount, CreateTime, ReadTime, DeleteTime Notes UTC, Target, FileSize, BlockSize, WriteRatio, ThreadCount, OutstandingOperations, WarmupTime, TestTime, Bytes, IOS FileIterationTest CSV Format Import the CSV results in Excel and use pivot tables for analysis. runtests Run all tests.Įxample: DiskSpeedTest.exe -settings DiskSpeedTest.json runtests. version Show version information -?, -h, -help Show help and usage information Commands: writedefaults Write default values to settings file. Usage: DiskSpeedTest Options: -settings (REQUIRED) Path to settings file. Run TestsĬ:\.\netcoreapp3.1>diskspeedtest.exe -help DiskSpeedTest: Utility to automate iterative IO performance tests. ![]()
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