Have you tried using dd?
dd if=/dev/sda of=/tmp/myblocks
That would require that you know which /dev entry the device was
mapped-to, after you stick in your SD card, try running "dmesg" and see
if it says that it found and mapped a new device.
If that works, you should be able to mount your output file as a filesystem:
mount /tmp/myblocks /mnt/floppy -o loop -t vfat
--ronan
> Is there a way to read the blocks from an SD card directly, i.e. no file
> system?
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