The errors we're talking about here are transient. The memory location itself is still usable, the contents get changed when a cosmic ray hits. After the hit, t

The errors we're talking about here are transient. The memory location itself is still usable, the contents get changed when a cosmic ray hits. After the hit, the corrupted value is held without a problem. Memtest checks if the memory location has a gross fault which prevents it from storing values correctly. Doesn't seem like memtest will help.