How to make file system

[Han Tin]

To all,
I am very new to RHL.  I just install RHL ES server.
I would like to know how to use mkfs.
 
df -k
Filesystem       1K-blocks           used Available  Use%     mounted on
/dev/mapper/volGroup00-LogVol00
                       420620928         1841808  397412748       1%       /
/dev/sda               101086               12302     83565         13%     /boot
none                   2073628                     0   2073628         0%    /dev/shm
 
This is what I got.
 
How will I create more filesystem        /dev/sda2     /data1  etc..etc...
 
Please help.
 
Thanks in advance.
 
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