selftest Description Use the selftest command to run a self test and diagnostics. Syntax selftest start disk selftest stop disk Arguments start disk Starts a disk self test operation. stop disk Stops a disk self test operation.. Defaults None. Command Mode Privileged EXEC Mode Global Configuration Mode See Also See the following related commands: n “show selftest” Usage Guidelines When you enter , the following message appears: This is an intrusive self test. This test will put the system in bypass mode and perform read/write operations on the disks. The system will not process any network traffic for the duration of the test. At the end of the test, you need to reboot the system. While the test is running, if you attempt to run other commands, you will receive errors. Do you want to proceed? (y/n) [If you don’t respond, the question times out.] Disk self test has been canceled. Examples None.