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From: "Emmanuel Chriqui" <wingman@waika9.com>
To: <freebsd-stable@freebsd.org>, <freebsd-hackers@freebsd.org>
Date: Tue, 19 Apr 2005 09:52:07 +0200
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Subject: PXEBOOT/TFTPBOOT + big MD_ROOT problem
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Hi, 

I'm trying to make very big MD_ROOT (300MB) sent using PXEBOOT+TFTPBOOT. No
NFS. It's a sort of diskless machine with all the system on ram. There is a
problem when the preloaded image is >~32MB. Kernel loads but it does not
seem to find the files. It seems as if only part of the image is really
there. With a "small" image (<~32MB), no probleme. I use the same image, off
course, same init etc... just more data for my application in the big image
case. 

I use a classic mfs_root approche to make my image 

dd if=/dev/zero of=$MFS_FILE bs=1k count=$SIZE 
mdconfig -a -t vnode -f $MFS_FILE -u0 
bsdlabel -w /dev/md0 
newfs /dev/md0a 
mount /dev/md0a $MFS_FILE_MOUNT 
cp ... my content... 
umount $MFS_FILE_MOUNT 
fsck -t ufs /dev/md0a 
mdconfig -d -u 0 

then I mount the $MFS_FILE_MOUNT . 

I use i386/5.4RC2/TFTPD/PXEBOOT+TFTPBOOT . 
(same pb with a 5.3). 

Am I missing something obvious? 

Emmanuel.