In an attempt to eliminate periodic memory issues in the spacecraft, engineers have reformatted its memory at the mobile laboratory located on the surface of mars.
During this process its flash memory disrupted. Flash memory is used to store data during night time as the system power downs to save energy generated by the solar panels during day.
There are seven flash memories in the rover. In December 2014 the engineers were storing the data in the volatile memory for the night that requires power to operate instead of using the flash memories. Recently the team has decided store it in the flash banks and they were succeeded in bringing six units out of seven online.
Volatile memory is similar to RAM which stores temporary data and loses all the data when the power is turned off.
Researchers are unable to identify the problem with the memory.
NASA officials reported, “Earlier this week, Opportunity became the first vehicle ever to travel the distance of a marathon race on the surface of another world. The rover is examining outcrops on the western rim of Endeavour Crater, approaching ‘Marathon Valley,’ where clay minerals have been detected in observations by NASA’s Mars Reconnaissance Orbiter.”
By the end of 2014 it has experienced amnesia many times, so this led to the researches to store the data in volatile memory.