disktest Test Modes.

Connection Test 

This mode is only available for the hard disk test. There is no Connection test for the floppy driver test. Only one instance of disktest (which monitors UNIX error messages) is allowed for each disk device. disktest displays messages and reports errors. The test also opens the hard disk, checks the disk configuration, reads a few blocks, and then closes the hard disk. No File System subtest is run. No Write option is available in Connection test.

Functional Test 

This mode does not allow disktest to monitor UNIX error messages. More than one instance of disktest is allowed for one disk device. Both the File System and Media subtests can be run in Functional test.The floppy test can also be run in Functional test mode.

If you invoke SunVTS through SyMON, the following Functional Test description applies:  

This mode is only available for the hard disk test. There is no Online mode for the floppy driver test. Only one instance of disktest is allowed for each disk device, which monitors UNIX error messages. disktest displays messages and reports errors.

In this mode, disktest also opens the hard disk, checks the disk configuration, and executes the Media subtest. Next, disktest performs random seek checks. By default the media sub-test performs a read-only test on 30% of the partition under test. No File System subtest is run. When the test finishes, disktest closes the disk device being tested. No Write option is available in Online mode.