30-60s is way to much.
Have you checked you processes in xterminal with command top.

Shut down it and remove battery and boot up to see if it still hangs.

.edit
Also tun in terminal

df -h | grep rootfs

And copy paste output here.

df display the amount of available disk space for filesystems

| just continues command (in this case df -h) and returns df list to next command which in this case is grep rootfs which in this case takes from list only rows where rootfs is mentioned.