converting to ntfs

Here's the command prompt method:

convert [drive:] /fs:ntfs [/v]

Parameters

drive:

Specifies the drive to convert to NTFS.

/fs:ntfs

Specifies that the volume be converted to NTFS.

/v

Specifies verbose mode. All messages will be displayed during conversion.

You can convert to NTFS without losing data, but to combining partions is harder, I would reccommend PartionMagic.

http://www.powerquest.com

On eyou will need to use a third party software such as Partition Magic or System Commander to combine the two partitions into one without losing data

To convert the file system to NTFS
The conversion is a one way process
Boot to a Command Prompt
Type CONVERT [drive letter]:/FS:NTFS

If i read this correctly, your goal is to combine 2 partitions into one, not necessarily just convert the format of the partitions to NTFS. What operating system are you using (NT4, Win2K, Win XP)? The procedure will be different depending on your operating system.
Before you do anything, make a good backup of all data on both partitions.

If you are using NT, you can accomplish this with the tools provided (Disk Manager). If you are using Win2K or WinXP, you must resort to 3rd party software (Partition Magic or something similar).

One thing holds constant whether you use the NT Disk Manager or 3rd party software. That constant is: the only way to extend a volune (NT Disk Manager) or resize a partition (Partition Magic) is by combining an existing partition with free space (unformatted and unpartitioned).

So the first step, no matter which way you go is to clean off your D Drive (move data to C or to other media - CD, zip, floppy, tape). Then you have to go into Disk Manager (Windows NT) or Disk Management (through the Computer Management tool in Win2K or XP) and delete your D partiton. This provides the free space to extend or resize your partition.

From here, if you are using NT, follow the instructions in NT help for Extending a Volume Set. NOTE: to extend a volume, the volume being extended must be formatted as NTFS.
If you are using Win2K or Win XP, install Partition Magic (or something similar) and follow the instructions for resizing a partition.While the Disk Management tool in these 2 operating systems also provide the capability to Extend Volume Sets as in NT, there are some extra requirements that could not be overcome (in your case) without stating froma clean disk (in which case you could just repartition as you want any way).

FYI, all the instructions in Answer 1 will do is convert a FAT or FAT-32 partition to NTFS.

Hope this helps.