You would have to create a partiotion using fdisk or some other partition program.
then you can format it for ext3 file system
sudo mkfs.ext3 /dev/sda1
82 => Linux swap / Solaris 83 => Linux ext2 & ext3 85 => Linux Extended partition
Windows XP only recognizes FAT16, FAT32, and NTFS partitions. If it is not one of these (such as ext3 or ReiserFS), it will report it as an "unknown partition."
as root: df -h to see the disks and partitions mkfs.ext3 /dev/sdb1 Where sdb1 is the disk and partition you want to format. This will format sdb1 partition to ext3.
There are programs you can download that will read Linux file systems. Common file systems are ext2 and ext3.
You have to create the primary partition, which will create a drive with assigned letter for you. Or you can create the extended partition where you can create logical drives it can be more than 1.
If there is an unallocated space on your disk, you can create partition directly with this unallocated space; if there is no unallocated space on your disk, you should first shrink a comparatively larger partition to get an unallocated space, then create partition
Some people do not like having a separate /home partition for Linux, though it is better for recovery purposes. For the purposes of the question, it is assumed that you do not want a separate partition for your /home directory. The best performance is provided by placing a Linux swap partition first on the drive. This should be at least double the amount of RAM you have installed, but no larger than 1 GB. You will have to move the XP partition to the end of the drive after you have installed it. The partition after the swap partition should be a Linux partition. I personally prefer ReiserFS, but ext3 is slightly more popular, mostly due to the larger number of error recovery tools. The last partition should be the Windows XP partition.
Only one partition is necessary to install Red Hat Enterprise Linux. If no other partitions are present, the single partition usually contains the entire / system hierarchy. As for the file system type, Red Hat Enterprise Linux only supports ext3 and ext4 by default, but support for additional file systems can be added by recompiling the kernel.
On MBR partitioned hard-drives only 4 primary partition can be created. (Use extended and logical partitions to create more partitions).
The DnsCmd command is used to create a new application directory partition. Ex. to create a partition named “NewPartition “ on the domain controller DC1.contoso.com, log on to the domain controller and type following command. DnsCmd DC1/createdirectorypartition NewPartition.contoso.com
Create one primary partition and an extended partition with four logical drives within it.
Diskpart.exe