Add check_disk() to query the disk insertion status and prompt the user if necessary. Use this in place of init_disk(). Perform an unconditional disk_mount_all() from the main function. Change-Id: I9a8cc42266edf99cd15ece3aee8fa25835df04ae
Change-Id: I75918301214cd415392f8c95e8a07205cfa21659