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Oracle® x86 Server Diagnostics, Applications, and Utilities Guide

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Updated: June 2016

storage mst

The storage mst command runs the Mechanical Stress Test (mst) for the time duration specified by the -time flag and for the -pc (count) iterations. The test reads the blocks sequentially from the device. The default is to run the test once, until all blocks have been tested.

If both -time and -pc flags are specified, the test runs until either the time interval has lapsed, or the count has been reached.

Command Syntax

udiag storage mst { all | <device_name> } [ -time <n> ] [ -pc <n> ]


Runs the test on all block storage devices.
Must be entered as HDDx, SATAx, USBx, VHDx, or NVMEx, where x represents the index of the device. The index of the device can be found by running the udiag storage info command. This command lists all devices and identifies block devices. Tests run only on block devices.
-time <n>
Specifies the maximum test time in seconds in hexadecimal. The default is 0, which indicates no time limit. The test runs to completion.
-pc <n>
Specifies the maximum number of times to run the test. The default is 1.

Resource Requirements



To run the test on HDD02, type:

fs0:/> udiag storage mst HDD02

To run the test on all devices for a total of 4 hours, type:

fs0:/> udiag storage mst all -time 3840