How do you fix a corrupted memory card for ps2?

I found a room with someone asking the same question and someone said to put a CD with songs into the system while it is off. Close the system and turn it on, then go to the memory space from browser and delet the corrupted data. I thought the man was stupid but I tried it. The this is I have 2 memory cards and on each memory card there is 2 corrupted datas. I was only able to delet one corrupted data from the memory card in slot one and none from the other card... So it does work and it's worth a shot as it clears at least one corrupt space. Good luck with the fancy stuff and Kudos to the man with the idea. :-D