Originally posted by Igor123 ... I guess a test for that could be to shoot a burst of X images, and compare total write times when set to write on one card, compared to when configured to write every second image on each card.
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I don't think things can be configured that way so there is no test that can be performed.
The camera does not operate like a RAID array and write/mirror to both cards/drives at once. I don't know what this change would cost but computers don't do this, either, unless they have a RAID controller (seems like it is not an uncommon feature).
I agree that writing the same image to both cards for redundancy is not as convenient as I thought it would be. I don't recall coming across complaints of double write time for the K3 cameras.. but I didn't really read much about those cameras, either !
I take pictures of things slowly enough that the longer write times wouldn't matter. I presume there would be little impact to practical use of the camera because the buffer would hold enough images for my here and there approach..
How this increased write time impacts image review time would be interesting to learn. If there is no impact there.. then the feature is still very usable for single image (rather than burst) use.