eelnoraa wrote in post #18653400
What is the capacity and how often have you been using them? One of the legitimate reason for memory to fail is they got wore out. NAND flash can only support limited number of "Program Erase" cycles. Depend on the type and speed, the PE can be in the order of 1K-1.5K (MLC) or 30K-50K (SLC). It is very highly unlikely to wear out a SLC card. For low capacity card and high usage (video shooting), it is possible but still unlikely to exhaust the life of flash for MLC card.
Legitimate cause aside, defective cards are possible too, but I found it very unusual for a single person have multiple defective CF cards. Is it possible that they are counterfeit? Also is there any special handling or usage you are doing with the cards? Say you leave them the car or other high temperature environment all the time, high humidify usage ....
What is the capacity and how often have you been using them? One of the legitimate reason for memory to fail is they got wore out. NAND flash can only support limited number of "Program Erase" cycles. Depend on the type and speed, the PE can be in the order of 1K-1.5K (MLC) or 30K-50K (SLC). It is very highly unlikely to wear out a SLC card. For low capacity card and high usage (video shooting), it is possible but still unlikely to exhaust the life of flash for MLC card.
Legitimate cause aside, defective cards are possible too, but I found it very unusual for a single person have multiple defective CF cards. Is it possible that they are counterfeit? Also is there any special handling or usage you are doing with the cards? Say you leave them the car or other high temperature environment all the time, high humidify usage ....
They are almost new, and i can't remember what kind of handling i did to them, i had another card got more damage handling but still working fine, i also think that they are counterfeit, but now i can't complain about them, but i really want to be able to format them, or if i can to recover them, so if i can't use them with card reader then how i gonna make them working again? Also didn't work with the camera to format them, but i won't give up yet, i just didn't shoot since long time so i didn't try to find a way to recover them or try to make them work again.
