Create a partition 1 drive to make more
hii sir my my computer in only 1 drive 500 gb we make a two drive 250 gb without format ple give the solution
Use on of these programs: http://en.wikipedia.org/wiki/List_of_disk_partitioning_software
Acronis Disk Director Acronis Proprietary software Yes
Active@ Partition Manager LSoft Technologies Proprietary software Yes
AOMEI Partition Assistan AOMEI Technology Proprietary software Yes
BootIt Bare Metal TeraByte Proprietary software Yes
Bootpart Microsoft Proprietary software Yes
cfdisk unknown Free software Yes
Cute Partition Manager OSL Corp. Proprietary software Yes
Data Lifeguard Tools Western Digital Proprietary software No
Disk Druid Fedora Free software Yes
Disk Manager Free Wondershare Software Proprietary software Yes
Disk Utility Apple Proprietary software Yes
Disk Utility (Palimpsest) Red Hat Free software Yes
DiskDrake Mandriva Free software Yes
diskpart Microsoft Proprietary software Yes
EASEUS Partition Master CHENGDU Yiwo Tech Development Proprietary software Yes
fdisk (FreeDOS) Brian Reifsnyder Free software Yes
fdisk (Microsoft) Microsoft Proprietary software Yes
fdisk (OS/2) IBM Proprietary software Yes
fdisk (Unix-like) unknown Free software Yes
FIPS Arno Schäfer Free software No 
GNU Parted unknown Free software Yes
GParted The GParted Project Free software Yes
KDE Partition Manager Volker Lanz Free software Yes
Large Drive Tools (LDT) SA Development Proprietary software Yes
Logical Disk Manager Microsoft Proprietary software Yes
MaxBlast Maxtor Proprietary software No
ntfsresize Szabolcs Szakacsits Free software No 
O&O PartitionManager Pro O&O Software Proprietary software Yes
Paragon Partition Manager Paragon Software Group Proprietary software Yes
Partition Commander Avanquest Software Proprietary software Yes
Partition Genius Spotmau Proprietary software Yes
Partition-It! Quarterdeck Proprietary software No
Partition Logic J. Andrew “Andy” McLaughlin Free software Yes
the Partition Resizer John “Zeleps” Lagonikas Proprietary software No
Partition Wizard MiniTool Solution Proprietary software Yes
PartitionGuru (formerly DiskGenius) Eassos Proprietary software Yes
PartitionMagic Symantec Proprietary software No
PartitionStar Christian Wallbaum Proprietary software Yes
QtParted Vanni Brutto Free software No 
Ranish Partition Manager Mikhail Ranish Proprietary software No
SeaTools Seagate Proprietary software Yes
Solaris format utility Sun Microsystems Proprietary software No
Super Fdisk CHENGDU Yiwo Tech Development Proprietary software Yes
SwissKnife Premium CompuApps Proprietary software Yes
Hidream said:I wonder whether could you format the drive with Windows build in disk management< right click My Computer->manage->disk management, then right click the drive you want to format, you'll find the format option.
YUP --- http://windows.microsoft.com/en-us/windows-vista/Can-I-repartition-my-hard-disk
Can I repartition my hard disk?
You must be logged on as an administrator to perform these steps.
Yes. It's possible in this version of Windows to repartition your hard disk by using the Shrink feature in Disk Management. You can shrink an existing partition or volume to create unallocated disk space, from which you can create a new partition or volume. (Often, the terms partition and volume are used interchangeably.)
Open Computer Management by clicking the Start button Picture of the Start button, clicking Control Panel, clicking System and Maintenance, clicking Administrative Tools, and then double-clicking Computer Management. Administrator permission required If you are prompted for an administrator password or confirmation, type the password or provide confirmation.
In the Navigation pane, under Storage, click Disk Management.
Right-click the volume you want to shrink, and then click Shrink Volume.
Follow the instructions on your screen.
For detailed information on how to shrink a volume, open Disk Management, click Help on the menu bar, click Help Topics, click the Contents tab, click Disk Management: Welcome, click Manage Basic Volumes, and then click Shrink a Basic Volume.