[rtl] boot failure when mount root fs!

[dding]

When I patch and recomplie the Rtlinux successfully I try to boot and also succeeded! But when I reboot again I donot boot up the Rtlinux.   the screen say : ----------------------------------------------------------------------------------------------------------------------- -----------------------------------------------------------------------------------------------------------------------   Partition check :         hda: hda1 hda2 <hhda5 hda6 hda7 hda8>         EXT2 -- fs error (device 03:08): Inode bitmap for group 0 not in group (block0)! EXT2 --fs: group descriptors corrupted kernel panic :VFS: Unable to mount root     ------------------------------------------------------------------------------------------------------------------------ ------------------------------------------------------------------------------------------------------------------------ then stop and dead here ! I do not understand what had happened ,why the first boot using the RTlinux successfully but the second failed? I am a new user for Linux and Rtlinux , I need your help !   Thanks a lot!   Dding