1D X Mark II Owners Unite! Discuss & Post Photos

Scott_online wrote in post #18029558
That's interesting. I haven't tried connecting a CFast card to my Mac yet but if OSX is treating it like a drive instead of a card then that might explain why it's being written to and hence why some files are occasionally being corrupted. If you've ever connected a drive that's been connected to a Mac to a Windows machine, you'll see a load of hidden OSX files to do with Spotlight indexing and the trash.

That's an excellent observation, and could point to some issue with the CFast cards (the flash or controller).

You can only write data in chunks of the size of a flash block, which means that when a computer (or camera) writes really small files the card will be internally doing a read-modify-write operation (i.e. internally building a new flash block with your changes somewhere in the middle, then writing that block back out). As far as I'm aware, the controllers will favour writing that back to a new block, and marking the old block to be erased for reuse. I.e. even small operations on the card will be affecting more than just the tiny write that's being done. Any bug in the card controller's firmware, or potentially dodgy issue with the underlying flash, could well see files getting corrupted.

It would also explain why some people have initially loaded a "good" file from the card, but then later found it corrupted (assuming they hadn't actually just seen the embedded thumbnail the first time round and the raw data was actually corrupted all along).

I don't know if it's possible to mount the card read-only on Mac/Windows? On Linux I'm pretty certain it can be done, and that might reduce the chance of corrupting files when connecting a card to a PC.

sploo wrote in post #18029652
That's an excellent observation, and could point to some issue with the CFast cards (the flash or controller).

You can only write data in chunks of the size of a flash block, which means that when a computer (or camera) writes really small files the card will be internally doing a read-modify-write operation (i.e. internally building a new flash block with your changes somewhere in the middle, then writing that block back out). As far as I'm aware, the controllers will favour writing that back to a new block, and marking the old block to be erased for reuse. I.e. even small operations on the card will be affecting more than just the tiny write that's being done. Any bug in the card controller's firmware, or potentially dodgy issue with the underlying flash, could well see files getting corrupted.

It would also explain why some people have initially loaded a "good" file from the card, but then later found it corrupted (assuming they hadn't actually just seen the embedded thumbnail the first time round and the raw data was actually corrupted all along).

I don't know if it's possible to mount the card read-only on Mac/Windows? On Linux I'm pretty certain it can be done, and that might reduce the chance of corrupting files when connecting a card to a PC.

I think this probably explains pretty much what is going on - hopefully.

When I did my wedding last weekend, I ran into this as I realized that after I loaded the images off the CFAST card (to my Mac), then unplugged the camera - I had thumbnails of everything but no pictures - I didn't exactly know what was happening so I re-attached the camera did all my editing, then saved the files, then exported the finished files.

dzaneh wrote in post #18029381

Hosted photo: posted by dzaneh in
./showthread.php?p=180​29381&i=i125230429
forum: Canon Digital Cameras

Amazing Shot!

ISO 8000

I don't have any problems with the 1dx2's CFast card and Lr. I'm using a PC with Win 7 64 Professional. The operating system treats the CFast card as an external hard drive and CF cards as removeable drives.

My workflow is to remove the CFast card from the 1dx2 and use the Sandisk reader that came with the 1dx2. Canon recommends using the Sandisk CFast card and reader. I copy the files to my computer to a folder in my Lightroom folder. Launch Lr and import the files from the folder that I copied the files to. I have never imported files to Lr directly from the memory card in the camera or used ADD files.

I've had the 1dx2 since release and have never encountered any corrupt cards or files using the above workflow. For now, I'm only using the Sandisk 64gb CFast card and reader. I use a Lexar 64gb 1066 CF card in slot 1 of the 1dx2 and have the camera write full RAW files to both cards simultaneously.

Works for me everytime, YMMV

Windows 7 64 Ultimate no problems with cfast card. Card and reader came with camera. I use usb 2 because the cord is too short to reach the back of my PC.
One thing I did notice is when using the reader, the card gets pretty hot just sitting in the reader with no activity. I used a temp probe and temp was 102 degrees F, solid state drive in PC was 88F and room temp was 72F. Transferring images it gets a bit hotter. Noticed the hottest part on the card is the bottom over the scan image. Reader was around 100F. Transferred 200 images using usb cord and checked temp of card as soon as it completed and it did not increase in temp.
Could be that the heat is corrupting files. Maybe the card gets hotter on a Mac.
Imagine a 90 degree room, card would be 120F.

cwphoto wrote in post #18029382
Daniel, you have a great eye. Not just this one, but many others too.

Thank you! I saw the leaves during a photo shoot, they were on the side of the road we were walking on, and very nicely lit, so I thought they would look good over saturated. Sometimes you see the final photo before you take the shot, knowing what you can do in PP, it just has the potential.

Got it out last night for an E session. The camera DR is just awesome. I am able to fill from front and do just about anything I want to do. Light on both these files are straight off light. I let the sky blow a little here. was trying, w/o success to get a little sun-ray going past the couple. But post recovered the sky easily and added a little glow with onOne. Shot in the field is a straight off camera file with a LR Preset

AF is simple outstanding. I am going out now and getting zero misses with AF. Servo is killer. Wont miss. I have both my settings backed off 1 click to slow for portraits. So far I have not been out of case 1

MedicineMan4040 wrote in post #18029489
Tell me if my 'system' will work.
I always make a folder on the desktop.
Insert card....open the folder, select all an drag into the folder on the desktop.
Then I'll either import into LR or view via Bridge.
I then work up the images I want to keep.
Then move the folder to an external hard drive.
I realize with this approach no true cataloging with LR.

I ask because only today did I put the CFast into the 1DXii.

It'll work fine, frankly I prefer to have all my images in a more organized location though.
"Desktop" is a buried in the Windows system folder on C: drive.

When you move the folder to the external, how does LR then find it again?
Do you then work from the external drive? Or does a copy remain on the internal drive? If so, where?

All my photos are on a separate drive letter, in a specific folder. You can add a shortcut to said location to your desktop to make it easy/fast to find it. If the shortcut is to your working external drive, this would at least save you a step.

notastockpikr wrote in post #18029835
I don't have any problems with the 1dx2's CFast card and Lr. I'm using a PC with Win 7 64 Professional. The operating system treats the CFast card as an external hard drive and CF cards as removeable drives.

My workflow is to remove the CFast card from the 1dx2 and use the Sandisk reader that came with the 1dx2. Canon recommends using the Sandisk CFast card and reader. I copy the files to my computer to a folder in my Lightroom folder. Launch Lr and import the files from the folder that I copied the files to. I have never imported files to Lr directly from the memory card in the camera or used ADD files.

I've had the 1dx2 since release and have never encountered any corrupt cards or files using the above workflow. For now, I'm only using the Sandisk 64gb CFast card and reader. I use a Lexar 64gb 1066 CF card in slot 1 of the 1dx2 and have the camera write full RAW files to both cards simultaneously.

Works for me everytime, YMMV

It would be amazing if all the problems were solved simply by insuring that one copies/transfers files to their computers!

The CFAST is literally tricking people that rely on software to "import" etc, rather than simply using the OS to transfer.

I hope this is the whole problem!

robamy wrote in post #18029635

IMAGE LINK: https://flic.kr/p/HrgB​mU Ruby Throated Hummingbird by A & R Photography, on Flickr

IMAGE LINK: https://flic.kr/p/HNDz​f5 The Happy Couple by A & R Photography, on Flickr

Nice job; the second photo is my favorite

Autofocus doesn't struggle with fast moving terns

Least Tern

Tc202 wrote in post #18030205
Autofocus doesn't struggle with fast moving terns

Least Tern

How much did you crop that?

digital paradise wrote in post #18030218
How much did you crop that?

About 40-50%

First real time getting to play...ISO 2500 for each I think and using the notorious CFast card.
Per my work flow I copied from the card to a folder on the desktop then imported from that folder
into LR.
My focus was not exactly where I thought he'd land and feather detail is nowhere near where I want.
Distance to the bird was 10 yards give or take a foot. Extreme cloud cover as is normal here...