redhat开机提示memory for crash kernel (0x0 to 0x0)

系统：Redhat5.1

开机故障：

root(hd0,0)

  dilesystem typer is ext2fs, partition type 0x83

 memory for crash kernel (0x0 to 0x0)notwithin premissible range redhat nash version 5.1.19.6 staringing

reading all physical volumes,this may take a while .....

found volume group VolGroup00 using metadata type lvm2

2 logical volume(s) in volume group VolGroup00 now active

尝试：在开机grub界面按a修改，添加crashkernel=128M@16M结果还是不行。后来只能重装系统了。