There is an incompatibility (confirmed by Lexar) between certain Lexar 400x and 1000x CF cards and the D4s. I discovered it when I tried to format my four 1000x 16 gb CF cards in my D4s the day I received it from Roberts Camera. The camera would not recognize or format the any of the CF cards. It would format all of my Sony 16 gb cards successfully. However, if I inserted one of my Lexar cards with an XQD card already in place, the camera would not recognize either card.
I too had this problem- went to format and blam!, nothing. Fortunately my other one worked and got me through. I sent mine out on Friday and got it back today- 32gb 1000x replaed w/ 32gb 1066gb. Like my guys at Lexar.
>I too had this problem- went to format and blam!, nothing. >Fortunately my other one worked and got me through. I sent >mine out on Friday and got it back today- 32gb 1000x replaed >w/ 32gb 1066gb. Like my guys at Lexar.
I believe B&H has those cards on sale this week for $64 each. You might want some more backup.
I had 4 of the 32GB 1000X cards that Lexar did an exchange on with no questions asked. They replaced all 4 with the newer 1066X cards. Turn around was about 1 week from my FedEx out to their return back to me, even though they said to expect 2-3 week turn around.
I had a similar issue with my D3s although it was the newest Sandisk CF cards. The menu shows red and doesn't do anything when I try to confirm format. However, the 2 button formatting method works perfectly fine. I don't know if this is something I need to be concerned about, now using 2 cards in backup mode and recorded 600 or so shutter releases without issue. My guess is that it is a firmware issue (already running last update 1.02) but there won't likely be any new firmware updates for this older model.
Photography is the art of discovery...comments and critiques always welcome on any photo I post!