2 questions on diskless client setup.

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Using Centos 5.2 upgraded from 5.0 using yum on a couple of old Dells in a lab 
environment. I don't think hardware is part of the problem, just need 
configuration help. 

1: I can boot the diskless client and it come up, but when I do a "mount" 
command on the client, the output is indistinguishable from the output of the 
mount command on the server. Currently the fstab in .../root 
and .../snapshot/<diskless client name> have no entries in them. I set this 
up using the "how-to" from the Centos web site, I might be missing something. 
I was wondering if someone could point me to information on how NFS mounts 
and fstab files work as well as how the "root" and "snapshot" directories 
work. I'm guessing that snapshot is where you set up the unique personality 
of each client, while "root" is global to all clients, but I would like info 
on how it all works together. I could continue to guess and try to figure it 
out on my own, but my experience has shown that I might get a working 
solution that is NOT the best. 

2: I am running NFS4.  I also set up all the diskless clients in an /export 
directory that is shared with several other exported directories (its a lab, 
so the devices do double or triple duty). My export file has /exports with 
the "fsid=0" flag. So, when I mount, I don't have to have "/exports" in the 
directory string. All is fine until the initial mount done by netboot(?), it 
issues the first mount command with "/export/diskless/i386/centos5.2/" as the 
directory string and fails. To work around this, I put a link in that 
links /export to /export/export and exported /export/export. UGLY I know, but 
it was the work around I discovered. Anyone know a better way of dealing with 
this? 
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