BMPCC not recording in raw.

Hello, I just bought a Blackmagic Pocket Cinema Camera on eBay and it came with a huge SD card. The card is a Lexar Professional SDXC 256 GB 600x. I've never used this brand before. It records fine in ProRes, it's a little choppy on playback with fast camera moves but other than that it works perfection and the picture quality is great. But when I switch the camera over to raw and try to record, the "ready" at the bottom of the screen turns into a "rec" for a split second and then back to ready again without recording anything. I did a little research and it seems like this problem is pretty common when the card write speed is not fast enough. I was just wondering if that's the case with this card or if there could be something else that would cause this to happen. Thank you.

Have a look at the officially-supported SD for the BMPCC for ProRes and Raw:
Click on the top question in the FAQ.
https://www.blackmagicdesign.com/support/faq/43083
Best,
Oliver Mann.

this card read at 90mb/s buy write at only 45mb/s sorry................you have to go for sandisk extreme pro