[U-Boot-Users] Newbie needs help with RAMDISK

[Luke Fimmerzane]

Hi,
I'm new to u-boot and would like to mount my rootfile system on a RAM disk. 
Its an arm 9 target.
I'm using a book from KARIM YAGHMOUR called Building Embedded Linux systems 
as a reference guide to help with creating the RAM disk and understand the 
features of u-boot. (There's a really good section on u-boot in this book).
I've managed to create the ramdisk, download it to my target but when I boot 
I get this message (only relevant sections included):

Kernel command line: root=/dev/ram
......
......
RAMDISK driver initialized: 16 RAM disks of 4096K size 1024 blocksize
......
.....
cramfs: wrong magic
FAT: bogus logical sector size 65535
Kernel panic: VFS: Unable to mount root fs on 01:00

AAgh!!! Where could I have gone wrong!!
I know this is a voluntary site but if someone could give me some give me a 
few hints then thanks.


Luke F

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