5D4 separate write RAW & JPG to CF and SD, not fault tolerant!

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Daniel Regular Member • Posts: 165
5D4 separate write RAW & JPG to CF and SD, not fault tolerant!

I setup my my 5D4 to write RAW to CF and JPG to SD card.  The thinking is that I will have a backup in case one of fails.  Last week, during a shoot, I shot a burst of 10+ images.  I noticed some sort of msg saying CF card failed and need to reinsert.  During this time the red light is on showing it's trying to write buffer to memory cards.  I waited a couple mins but nothing changed on the screen and red light was still on.  So I opened the memory slot doors and remove and reinserted the CF card.  Once CF card is removed, camera immediately powered off and rebooted when door closed.  Those burst of images were NOT written to the SD card.  So what's the point of separate write to CF and SD if any failure to either CF and SD will prevent writing to the other??

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