Hey there,
I stumbled onto a thread on xdadevelopers where they are looking at the Nexus 7; apart from partition and df output, there's a 3.1.10 kernel config, which I'm attaching here for convenience and analysis.
ls -l /dev/block/platform/sdhci-tegra.3/by-name/ lrwxrwxrwx root root 2012-06-28 11:51 APP -> /dev/block/mmcblk0p3 lrwxrwxrwx root root 2012-06-28 11:51 CAC -> /dev/block/mmcblk0p4 lrwxrwxrwx root root 2012-06-28 11:51 LNX -> /dev/block/mmcblk0p2 lrwxrwxrwx root root 2012-06-28 11:51 MDA -> /dev/block/mmcblk0p8 lrwxrwxrwx root root 2012-06-28 11:51 MSC -> /dev/block/mmcblk0p5 lrwxrwxrwx root root 2012-06-28 11:51 PER -> /dev/block/mmcblk0p7 lrwxrwxrwx root root 2012-06-28 11:51 SOS -> /dev/block/mmcblk0p1 lrwxrwxrwx root root 2012-06-28 11:51 UDA -> /dev/block/mmcblk0p9 lrwxrwxrwx root root 2012-06-28 11:51 USP -> /dev/block/mmcblk0p6
Filesystem Size Used Free Blksize /dev 487M 32K 487M 4096 /mnt/asec 487M 0K 487M 4096 /mnt/obb 487M 0K 487M 4096 /system 639M 422M 217M 4096 /cache 436M 7M 428M 4096 /data 5G 4G 1G 4096 /storage/sdcard0 5G 4G 1G 4096 /mnt/asec/com.lexi.android-1 3M 1M 1M 4096
Enjoy,