pmemtest Test Modes

Connection Test 

Yes 

In this mode, one percent of the memory is read. pmemtest also informs the user how much physical memory is available. For sun4m, sun4u, and UltraSPARC servers, the test reports the ECC errors that have occurred since it was last invoked. The test reports ECC errors for a particular CPU or memory board when physical mapping is selected, otherwise it provides the SIMM number of the ECC memory error.

Functional 

(Offline) 

Yes 

In Functional test mode, the amount of memory to be read can vary. For UltraSPARC servers, this test mode reports all ECC errors that have occurred since the system was brought online