ECC + checksum have a slight flaw. If too many errors happens, the checksum can be correct even though the content is corrupted. Hum... I know what you think:

ECC + checksum have a slight flaw. If too many errors happens, the checksum can be correct even though the content is corrupted. Hum... I know what you think: ThisShouldNeverHappen When exploited by human it is called a collision attack. Works pretty well, so many people trust but never check.