There are many gui tools that can help, such as QtParted. You can also accomplish this from the command line as root by doing the following.
fdisk /dev/harddrive letter
//under harddrive letter insert the drive you want such as hda, or hdb
this will bring up fdisk focused on the drive you chose.
At the Command(m for help): type p
this will print the partition table as is currently sits like the folowing.
Command (m for help): p
Disk /dev/hdd: 60.0 GB, 60022480896 bytes
16 heads, 63 sectors/track, 116301 cylinders
Units = cylinders of 1008 * 512 = 516096 bytes
Device Boot Start End Blocks Id System
/dev/hdd1 * 1 60945 30716248+ c W95 FAT32 (LBA)
/dev/hdd2 60946 116301 27899424 c W95 FAT32 (LBA)
Command (m for help):
Then hit d
and delete all your current partitions. *skip if you want to preserve the exisiting partitions*
You'll have to enter the partition number you want to delete, 1-4 as it is for primary partitions. If you select a extended partition then you will be asked which partion inside you wish to delete.
Then use n
to create new partitions. follow the onscreen instructions.
Once you have finished creating the new table, use w
to write the table and exit.
then use mkext3fs /dev/hdxx
to format the new partion into ext3 format. XX contians the drive and partition number, such as hda4.
Another option is to install a handy administration tool called webmin. You can download it from webmin.com
it is also on Yum and can be downloaded by:
yum -y install webmin
After installing webmin open your favorite web browser and goto http://localhost:10000
login with user name root and your root password, under the hardware tab there is a partition manager tool. You can select partitions and delete them, as well as create new ones. It also provides statistics on disk usage, as well as a simple interface for optomising IDE parameters. *So your IDE disks run alot faster I increased my throughput by 10MB/sec by chaning one setting on one drive
*. Webmin also provides many admisitrative tools for managing the system.
Hope this helps.