A lot of bricks been happening, and #G2root has come down to the eMMC chip being the culprit, it's not a defective one but one that goes bad after a while. It just dies for unknown reasons. I'd like people to post their eMMC serials, if recovery gives them an error such as "can't mount cache, data, etc"
You need adb setup for this, use one of the stickys to get started with adb
1, start up adb and type these in.
adb reboot recovery
2, after the device starts up in recovery, enter this
3, and then this, your serial number should come up after mmc0:0001
cat /proc/kmsg | grep 'mmc0:0001'
It looks like M4G2DE 2.10 GiB is the bad one, judging from what the #G2root devs say, but lets see what our side is.
And unfortunaly I got the bad one too, rooted with gfree, this is what I got
<6>[ 8.328460] mmcblk0: mmc0:0001 M4G2DE 2.10 GiB
5/20/11 Edit: Added a poll, if you'd like to see more options please let me know.