Sorry if I didn't search well enough to find this answer:

I am trying to reformat my 8GB SDHC card using sfdisk, then mkfs.vfat. All seems to go well with rewriting the partition table, and when I use the mkfs command that seems to work. When I remount the card and look at the file sizes it only registers at 2GB, even though I set up a single partition for the full card.

Commands used:

sfdisk -uM /dev/mmcblk1

,7717, b
,,
,,
,,

mkfs.vfat -S 1024 /dev/mmcblk1p1

Any help would be appreciated.