Disk space is full

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Hi all ,

    We have almost 20 server which have Fedora Core 2 installed.
    The server have application server installed , mysql and etc for our 
j2ee application.
    However we have some problem in some of server , the disk space is 
full when i do df command . This is because we have to store image 
captured daily to the server. The image is about 74 MB and our server 
capacity is 40 GB.

   The weird things is that our j2ee application is still running 
without any problem . I think that the server will died , just a matter 
of time . What will happen to linux filesystem if the disk is full ?

Another question is my colleague ask me to use autopartition of grubs 
for linux server . However i have read some disadvantages using 
Autopartition of linux server . Anyone have a doc so that i can show to 
my colleagues regarding disadvantages ?

Thanks