Older SD card incompatibility problem with D-Lux 8

[norm_snyder]

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I picked up a D-Lux 8 for times when I am not planning to shoot photos and don't want to carry one of my M cameras or Q2M.  I have encountered SD card error message with some older, smaller capacity cards, asking me whether I want to format the card, but can't accomplish this in camera with older Sandisk Extreme 90 MB/s SDHC cards.  Has anyone else encountered this?   No problem with later Sandisk Extreme 170 or 200 MB/s cards.  This is not a major issue, but as I had the older cards, and files for D-Lux are smaller than the Q2M or M10M, I thought I might be able to use these.

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[BradS]

Did you check the position of the write lock slider ?

Can you format the old card in a computer or in some other device?

[norm_snyder]

I tried formatting on the computer.  The lock slider is in the correct position and these cards work in both M10M and Q2M.  The error message asks me if I want to format, but the camera controls don't respond.  If I put in a newer SDHC 200 MB/s SanDisk card, there is no problem, so I thought perhaps there is a speed minimum that the camera will tolerate.

[BradS]

5 minutes ago, norm_snyder said:

...., so I thought perhaps there is a speed minimum that the camera will tolerate.

It would seem a strange requirement but, I guess there could be. Anyway, it doesn't seem to matter as the newer cards work fine.