I have been getting occasional (a group of 2 or 3 failed shots every 200 shots or so) failures on the Lexar Professional 400x 32GB CF card in my D300s (Firmward 1.01 & 1.01). I have attached a screen grab from Adobe Bridge CS5 (ignore the .PSD and .JPG's, they are from post-processing of course). When I look through the files using Bridge, I see blank file icons (instead of thumbnails) which I can not open (Photoshop CS5 Mac: "Could not complete your request because an unexpected end-of-file was encountered."). I don't see single shot failures, it is always a group of from 2, usually 3, sometimes 4 shots that are sequential or almost sequential (often have one or two good shots between the failed ones, never have more than 4 failures). I shoot exclusively RAW (.NEF).
I reformat the CF card in the camera every day that I unload the card. I never saw these failures until about a year ago, I have had that card for almost three years now. I have tried removing & reinserting the card (the card is never removed from the camera at all, I always download via USB and I always use the same card).
I have just put an older 2GB CF card into the camera to see if the errors stop, but if the problem is an intermittent contact a new card will not fix it . . . and sooner or later I will lose shots that really matter. I have been lucky so far but in the last 10,000 shots I probably have lost 60-80 in 20-30 separate events.
Has anyone seen this sort of behaviour before? Does it sound like the camera? The card? Gremlins?
I suspect that your memory card is corrupted. Both Lexar and Sandisk include Image Recovery software with their higher end cards. Next time you encounter the problem try using the software to recover the corrupted images after you finish downloading the card, though you will need a card reader.
Using the USB port on the camera to download your images to the computer puts much more wear and tear on the camera body than using a card reader. Personally, I always use a Card Reader to download images to the computer.
Tue 17-Sep-13 10:57 AM | edited Tue 17-Sep-13 11:07 AM by marsmail
Flash memory has a finite "lifespan" which is usually stated as xxx k I/O ops. (In/Out operations) To you and me this means (as far as I know) that there is a limit to the number of times the flash "cells" (the tiny bits that actually store the digital information) can be reliably written to and read back. Eventually they "wear out" because the action of writing to them (and erasing them so that they can be rewritten) damages the material that they are made of. In the case of SSD "hard disks" for computers this figure can be as low as 150,000 I/O ops. Of course, formatting the card also uses up "lifespan" since in effect you are writing to every cell in the structure to tell it it is "free". What happens when the limit is reached is quite possibly what you are experiencing in that a write is made which fails to read back because not all the data is there, some of it having fallen through the "hole" in the flash cell. I suspect the answer to avoid this, especially as you say you have used this one card for several years, is to replace it with a new one. Hope this helps you figure out what to do.
Start an email conversation with Lexar customer service as their cards have a lifetime warranty. They will walk you through the steps to confirm the problem is with the card, but you will probably need an external card reader to test it with. Once confirmed, Lexar will swap your card for a new one.
Alternatively, with a card reader, you can do a deep format on the CF card from your computer to mark all the bad sectors like you would do with a hard drive. (Then quick format the card in the camera like normal.)
---------+---------+---------+---------+---------+ Joseph K Seattle, WA, USA