From Fedora Project Wiki
bug of system update
my susytem is unable to start and now it is not to perform again format and the errors are: kernel Panic -not syncing :VFS: unable to mount root fs on unknown block(0,0) Pid :1,comm:swapper not trained 3.1.0-0.rc1.git1.1.fc17.i686 #1 Call Trace: printk+0x2d/0x2f panic+0x66/0x16e mount_block_root+0x214/0x234 ? sys_mknod+0x2c/0x2e mount_root+0x59/0x5f prepare_namespace+0x11f/0x163 ? sys_access+0x25/0x27 kernel_init+0x135/0x13a ?start_kernel+0x380/0x380 kernel_thread_helper+0x6/0x10
how to bug it please help on the full detail