General Topics

DiskTester

MemoryTester

IntegrityChecker

dgl

Tips and How-To

Troubleshooting

run-sequential

The run-sequential command tests the sustained speed for writes and reads at any desired transfer size. It offers a quick look at drive performance.

Running DiskTester run-sequential

Using DiskTester.app, choose Sequential Test. Suitable defaults are chosen. You can exercise more control using the command line.

img
DiskTester fill-volume

Command line usage

The command line allows greater control. Please use disktester help run-sequential for details on the available options. In general, there is little reason to use the command line.

run-sequential
    [--iterations|-i <count>]                  "1"
    [--xfer|-x <size[K|M|G|T]>]                "4M"
    [--test-size|-t <size[K|M|G|T]|max>]       "2G"
    [--test-area|-a <start|middle|end|xx%>]    "start"
    <volume-name>

Examples

Various command line possibilities. Here Scratch is the volume to be tested. It is recommended to use at least three iterations for the best accuracy.

disktester run-sequential Scratch
disktester run-sequential --iterations 5 Scratch

To test with a transfer size of 64K or 4 megabytes:

disktester run-sequential --xfer 64K Scratch
disktester run-sequential --xfer 4M Scratch

To test the end of the volume with 5 iterations using 1MB transfer size:

disktester run-sequential --xfer 1M --test-area end --iterations 5 Scratch

Previous page: run-sequential-suite
Next page: iops