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Old Dec 6, 2009, 8:56 PM   #1
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Default New card help..

How would we know when it's time for a new flash card?
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Old Dec 6, 2009, 9:05 PM   #2
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I'm a little confused by the question. Do you mean that you expect it to fail at some point?

I'd make sure to have a spare card, just in case it ever fails. But, I've had very good luck with flash media. I've got cards that are approx. 10 years old and still worked the last time I tried them. Chances are, you won't need to worry about one wearing out anytime soon (even though in theory, they have a limited number of reads and writes, it's unlikely you'd hit any limits with normal use in a camera). But, even brand new cards can have issues. So, it's a good idea to have a spare available.

Note that I always format my cards prior to *every* reuse, using the camera's menu choice for format. That way, I always start out with a fresh File Allocation Table, just the way the camera expects it, since it's performing the format. If you run into a problem with errors or corruption, that's the first thing I'd do (reformat it using the camera's menu choice for format to recreate the File Allocation Table, since a corrupted FAT is usually the culprit).
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Old Dec 6, 2009, 9:18 PM   #3
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I'd have to dig around for some articles I've read on the subject. But, most products using MLC type memory are designed for a minimum of 100,000 write/erase cycles per cell, and due to wear leveling algorithms (and because you usually don't write to the entire card each time you use it), you should get more total read/write cycles from a card. Some cards using more expensive SLC memory are designed for 1 Million read/write cycles per cell.

Note that even many inexpensive flash cards have lifetime warranties now.
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