[OpenAFS] Caveats of having AFS cache on a shared ext3 partition in Linux?

[Jason Edgecombe]

Hi Everyone,

I know this is bad practice to have the AFS cache folder on a shared 
partition with the rest of the system, but what are the caveats of 
having the AFS be on an ext3 filesystem in Linux, which is shared by the 
rest of the system? I mean, besides filling the partition that AFS uses 
for caching. Should the 5% root reserved percentage help with that?

I'm using RHEL5.4 with the 1.4.11 openafs RPMs from openafs.org.

The background to this is I'l be deploying a university computer lab 
full of Apple 21.5" iMacs running Linux as the sole OS. I need to set a 
firmware password, but the Mac will not boot a /boot+LVM partition 
layout with a firmware password, but it will boot  with a password when 
I only have one partition. Things boot fine when no firmware password is 
set :(

Any help orinsights are appreciated.

Thanks,
Jason