Sandisk extreme 32GB and 16GB dont initialize in XO-1.75
georgejhunt at gmail.com
Sun Oct 7 07:33:00 EDT 2012
I've been working on a XO-1.75 as XS project. The smallest form factor XS
would use an SD card for School Server storage. So I purchased fast, large
SD cards from Amazon. These cards work in my mac, and they initialize, and
appear to work on the XO-1.5 running build 860.
The XO-1.75 software is build 21 (12.1.0), firmware is Q4D17.
The error message in the /var/log/messages is:
Oct 7 11:18:44 schoolserver kernel: [157819.866661] sdhci: Switching to
1.8V signalling voltage failed, retrying with S18R set to 0
Oct 7 11:18:44 schoolserver kernel: [157819.876896] mmc0: error -110
whilst initialising SD card
In my reading about SD cards, I discover that some SD cards are not
genuine. I have looked at /sys/... and the manufacturing number was "003"
which is appropriate for sandisk.
This error message is mentioned in
I'd be happy to give more info, or do testing.
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