It is good to start with a new card, in fact, I found cards did not recover from this issue, once it started. A first format on the camera I think would be OK probably, but I would advise never doing so again. Better is to format on computer. I don't use special software though. There is no need. M9 is FAT 32. In fact I think my current card was already FAT32 so I just put it in new, did not format and shot it. That was some time ago as it has lasted a long time. Easy to check the formatting on a computer. Right click and choose properties. Or "get info" on the mac. If Fat 32, I would insert and take some test shots, no format. Download them and check. If all is working you are good to go. Nice and simple.
I can tell you simply erasing the images en masse in camera works great on this camera, and I have cards which have seen 30K images that way and are still going. In fact I never had a card go bad with that method in over 250K shots on the M9 (two shutters)
On the other hand every card I ever used that was formatted often in camera eventually went bad, often within 5k frames and exhibited exactly the symptoms you describe.
I use 16gb cards which i researched, because the M9 is picky. They also did this.
I'd bet there is no one in this thread with more frames on a card than my current one, and it has one been formatted once, and multiple erased many many times.
Of course this is not the way I do my Sony A7. It gets a format everytime.
It's the way my M9 prefers it, which I learned after the same problem you describe on 5 different cards.
My camera with this old once formatted card locks up very seldom. I cannot remember the last time. That does happen from time to time if you shoot alot. Pull the battery and it's fine. But what you describe is different.
You have already seen the format method likely wreck this card. What do you have to loose trying multiple erase? My previous card lasted so long with that method I wore out the plastic base.
Theories are great. Experience is a better teacher.
🙂
Now, perhaps formatting on the computer often would be fine. I never do after once and the camera does not fail. So that seems a better way to me. Fast, simple and effective. Yes the Sony I format every time like you are "supposed to". My M9 hates that, and I don't think yours likes it either as the symptoms are identical. Ask the others if they have had your problem, or tested "not formatting" for 150K shots.
This camera was "like new" in January 2014, when I bought it.
Here I had it a month:
DSC08424 by
unoh7, on Flickr
A few days ago
😉
DSC09786 by
unoh7, on Flickr
I know it very well now, no offense to anyone
🙂
Think about it. When was the last time you formatted your computer HD? A long time I hope, but you delete stuff all the time. People act like this is heresy, if fact it is exactly the way it's supposed to work. The need for frequent formatting is because the other cheap cameras often corrupt card file structures, just writing and erasing. The M9 does not. Except when you format often in camera. That is not illogical as formatting is totally different than writing or erasing files.