Corrupted Card

[painya]

Hello, I am on a 5d mk iii running ML and had a couple hours of footage on my SD card. Now, putting it back into my camera I can not read the card, nor can I read it on my computer. I'm guessing this isn't ML related but some advice could save my ass.
Thanks,
Painya

[painya]

Update: I have full confidence in the ML team and am extremely grateful. However, certain people on this production are not, and are "non-believers." Could someone please explain why this is not ML's fault even though I know full well it is not? That would be greatly appreciated.

[Audionut]

Have them read this:  http://en.wikipedia.org/wiki/Coincidence

[painya]

Your humor is always appreciated! Thank you for your response.

[chris_overseas]

Was it a UDMA7 CF card, and did you put it in a USB 2.0 card reader at any point? It is possible to corrupt your data and even damage the card this way, and of course this has nothing to do with Magic Lantern. Technicians from Lexar, KomputerBay and official Canon support centres have all said this, eg see the "Important Information" here: http://www.fixationuk.com/Fixation/Sales%20-%20Memory%20Cards.html  Even some older USB 3.0 card readers suffer from the same problem (hence the reference at the link above to update your Lexar card reader firmware).

Failing that, as Audionut points out it's most likely just a coincidence. CF cards sometimes fail and I'm not aware of anything in ML code that could physically damage a memory card. AFAIK ML accesses the CF card in the same way that Canon code does.

[painya]

Chris-
Thanks but for some reason we've been shooting off of SD cards. Probably price. I've been using a Sandisk extreme pro and my (very new and fast) laptop couldn't recognize it saying it needed to be formatted. I ran a card recovery sysyem and it said there was nothing on the disk so I am guessing it is gone for good. Thank you for your reply!