Recently my D600 incompletely wrote a NEF file to SD card. Lightroom showed the preview image, but neither Lightroom nor Photoshop could load it. Both showed an "unexpected end of file." I was using a Kingston 8GB card and saving NEF only. The bad file turned up among a series of properly written files, no mode changes on the camera.
It has happened only once, but I'm looking forward to any insight someone might be able to give.
I agree that it looks like an issue with your SD memory card. If it was me I would replace the SD card. I can't see losing pictures for the cost of a memory card. Not worth the frustration. If you look at the cost of a SD card to camera body, lenses and other accessories, the cost of a SD card is very little I would recommend either a SanDisk or a Lexar memory card. Those brands are very reliable.
Thu 06-Jun-13 02:31 AM | edited Thu 06-Jun-13 02:34 AM by jhebert
My guess would be that not a ton of people shoot exclusively in NEF. I have not seen the issue but I also shoot JPEG+RAW and only edit a fraction of the images I shoot so it is possible that I just haven't noticed it. I do however copy all images to permanent storage and have never received an error message while copying files. It would be an interesting test for you to use the 2nd card as a mirror of the first and see if the files are corrupted on both cards or just one. You may be able to determine if it is the camera, the card or a particular card / slot combination.
>It would be an interesting test for you to use the 2nd card as >a mirror of the first and see if the files are corrupted on >both cards or just one. You may be able to determine if it is >the camera, the card or a particular card / slot combination.
Thanks for a good suggestion that hadn't occurred to me!
I've had my d600 6 months now, shooting primarily NEF files and I haven't seen this problem. I'm wondering if there's a way to scan the card for bad sectors. Was anything unusual going on when you were shooting? Full buffer? Low battery? I'm no expect, just speculating as to what might cause this error.
Battery showed 2/3 full or better. Camera set to single shot, so maybe a file or two in the buffer, but not enough to fill it. I have checked the first card's integrity using the Mac's Disk Utility, but I don't suppose that gets down to the sector level.
The same thing has happened now three times on two different cards in two different card slots, so I'm thinking it's likely a flub in the camera.
I'm glad that it doesn't seem to be a common problem, but I'm also glad my income doesn't depend on my pictures with this going on!
Intermittent problems like this are always hard to sort out.
>I can't check the cards directly because I reformatted them >before thinking to post here. > >However, I think the problem is definitely on the card because >the same defect is present on files I have since recovered >from the original cards.
That seems contradictory so I am not sure what you are saying there.
The point, though, is that it is very possible to have a bad cable or software issue that corrupts the data in between the card and hard drive. Before blaming the camera body it is important to see the problem while directly viewing from the computer directly from the cards.
>That seems contradictory so I am not sure what you are saying there.
1) I took pictures. 2) I transferred the files from card to computer using both Lightroom and Finder. 3) Both transfers exhibited the same "unexpected EOF" error. 4) I reformatted both cards involved. 5) I used file recovery software on both cards. 6) The recovered files exhibited the same errors as the original transfers.
>The point, though, is that it is very possible to have a bad cable or software >issue that corrupts the data in between the card and hard drive.
Is it likely that the same "cable or software issue" would manifest itself with exactly the same files when using two card readers and two different methods of transferring the files to computer? Possible, but I think not.
>Before blaming the camera body it is important to see the problem >while directly viewing from the computer directly from the cards.
I wish I could do that. But for the reasons given, I have to stand by my impression that it may be the camera: Three occurrences, two different cards, two different card slots, two different card readers, two different transfer methods, consistency of results between original transfer and file recovery software.
I intend to double-check my assumption by writing mirrored cards for a while, as recommended in post #8 above.
Thanks, Neil! It's only by questioning that we come to an answer. Keep up the good work!
You don't need to convince me, you need to convince Nikon when you send them a camera that appears to work properly 399 out of 400 times. And request they change out a major module, presumably under warranty. They will not likely rip off 1000 test frames and study all the resulting images.
Intermittent problems are the worst of the worst.
I'm sure you realize that resurrecting the files after a format is "messy" even though the end result is very suspicious. You seem to be set up to produce far cleaner evidence, should the problem continue.
You might talk to Nikon before you send it in to determine if they want you to include the original out of camera card(s) with defective images. Normally you are not supposed to send in "accessories" like cards but in this case they might want to see them.
I've shot over 300K images on my 5 bodies and never once actually found a defective file straight out of camera. I have discovered several dozen bad raw files well after the fact, but attributed it to post ingest problems, simply because I never saw this immediately after ingest.
Of course, I have never shot a D600, nor your particular camera . But just to say that your experience of more than 1 per 1000 is highly unusual. And if other D600 owners were seeing this rate of failure we would have many threads here discussing it.
If you mean that this happened after importing to your computer using the nikon transfer software, the same thing happened to me with my D800 one of the fits time I used it. Apparently it was a problem with the nikon transfer and after upgrading to a new version this has never happened again. If it is a problem already on the card, make sure that you format the card in the camera for the future.
In over 7000 frames, shot NEF only, loading into Lightroom from a reader, not once have i seen this or any other potential file write/read error. I swap the two 32g Sandisk class 10 cards every once in a while.
Thanks, everyone, for seriously considering my question.
At the risk of throwing a clinker on the fire, it occurred to me that my D600 has several times sounded as if it took two pictures with one press of the release despite the fact that I have Release Mode set to Single Frame.
But: a) I haven't found any cases where there were actually two pictures shot within a second of each other; and b) on one of those occasions, the occurrence was at about the same time as one of the truncated NEFs being written. (I don't recall the circumstances of the other occasions.)
So perhaps I have a problem with the shutter release or with the Release Mode Selector which may be related to the incomplete NEFs.
I've clearly got to start experimenting and taking notes.
You've got me convinced that the behavior I'm experiencing isn't typical of the D600. Thanks for that!