When I shoot in Raw + jpeg, no raw filkes show up.

Go to the camera's Menu and scroll to Image recording quality and you can select RAW.

Take a look at your file settings. If your shooting RAW, or RAW and JPEG you cannot record as fast as just shooting JPEGS. This means you may have to "wait" until the camera writes all the data to the card.

Also, look at the writing "Speed" of your SD card. If you have a inexpensive memory storage card it may have a much sower write time than others. Really doe make a difference.

Regards,

Mike "O"

CR2 files are created when you shoot RAW files. Your computer cannot read them without a Canon RAW plugin in whatever image processing software you're using.

Your camera can be set to record in JPEG, RAW or JPEG and RAW.

If you wish to know more about RAW files and their uses, then click here.

I hope this has helped you, if not then please add a comment to explain what additional information you'd like regarding this problem but otherwise please take a moment to rate my answer.

use windows search to find all the .jpeg files in your computer. you wil find it surely.

Go to the menu for the camera and look for "SAVE". you should have the choice in which format to save the pictures. Select "RAW" and then exit the menu. The camera should now save in RAW format. Some one or something probably switched the setting (such as reset camera).

Slow down after taking 6 RAW files ...
A RAW file is Approx. 12.4MB.
The memory usage is approx. 74,4 MB
The internal memory (Buffer) has a size for up to 75 JPEG compressed images.

Which size has the smallest jpg?
JPEG/Small: Approx. 1.2MB (1,936 x 1,288)
The Buffer is approx. 80 MB.

The data are calculated under Canons laboratory conditions.

The maximum Burst (the 17 shoots) means that the camera is writing to the card and the buffer is full. Than the cam will stopping taking pictures.

Which kind of Card do you use?
Check the spec for the card (write speed) and maybe buy a faster card.

This is normal for an XSi. What might be causing this:
-Picture setting producing huge picture files (RAW vs JPEG) -SD card not of same class, try using a faster card, such as a Class 6 or 10

Some cameras will shoot RAW + JPEG, and save a copy of each in a different directory on the card.

Re-check your owners manual, and also check the manufacturer's website for a firmware update...

check this site for specs. I believe that the Canon 40d will.
http://dpreview.com/

RAW quality will always be at least as good as JPEG quality. The reason your JPEGs are coming out sharper is that the camera is actually doing post-processing on the RAW data, performing sharpening, white balance, contrast and brightness adjustment, etc., before saving the JPEG. The RAW data, as the name implies, is taken straight from the sensor, without the sharpening and other post-processing applied to it.