China DOS Union

I have compiled and packaged BUSYBOX to generate the root filesystem: initrd.gz, and copied it into the U disk boot directory. Then I modified the grub boot menu menu.lst:

title Busybox
root (hd0,0)
kernel /boot/vmlinuz ro
initrd initrd.gz devfs=nomount ramdisk_size=52000

title Windows
rootnoverify (hd1,0)
makeactive
chainloader +1

When booting with the U disk and selecting Busybox, the previous boot was normal, but finally it reported:
......;
RAMDISK Compressed image found at block 0
No filesystem could mount root, tried cramfs
Kernel panic: not syncing :
VFS: Unable to mount root fs on unknown block(104,1)

It should be that the root filesystem cannot be found. I am not very familiar with Busybox, just want to use it to make a boot U disk.

The line for kernel is incomplete.

The line for initrd has some redundant parameters written.

There may be other problems. In short, it seems that you are not too proficient in both Linux and GRUB.