Needs More Space (Slave Servers)

Hello,

I have this configuration of a Webhosting Server.

RedHat 7.2
AuthenticAMD
AMD Duron(tm) processor
1001.760 MHz
cache size: 64 KB
Memory: 503580k/516032k available (1153k kernel code, 9892k reserved, 974k
data, 160k init, 0k highmem)
Linux server 2.4.18-27.7.x #1 Fri Mar 14 05:51:23 EST 2003 i686 unknown
hda: ST360021A, ATA DISK drive

Current Disk Usage
Filesystem            Size      Used     Avail     Use%     Mounted on
/dev/hda5             2.9G      1.1G      1.7G      38%     /
/dev/hda1             45M      16M       27M      37%     /boot
/dev/hda7             36G       33G       1.6G      96%     /home

>From the Disk Usage it shows that /home partion is 96% filled and I don't
have anything to delete on it. The data that is there on this partion is
critical.

I heared from somewhere about the Slave servers (Not DNS). Which i have
never heard before so could anybody please flash some light on this Salve
server, What are they? How do i setup and all or atleast put me on the path
where i can find details for this kind of slave servers.

I have googled and it gives me all the info regarding the DNS Slave servers
which is noconcern with this.

AFAIK i can add more space to the /home partion without disturbing the
current setup.

Correct me if i am wrong.

Regards,
Tina.