how to format hda1

[lito lampitoc <ral codewan com ph>]

Hi All,

I have the following partition:

/dev/hda1 	FAT (Win)
/dev/hda2	swap
/dev/hda3	Linux

I want to convert FAT partition (hda1) to a Linux partition but
everytime I do an fdisk it shows me the following error.

WARNING: Re-reading the partition table failed with error 16: Device or
resource busy

These are the steps I did:

1. unmount /dev/hda1
2. delete /dev/hda1
3. create a new partition for /dev/hda1
4. while writing it shows the above error

other method:

1. boot on linux rescue
2. do steps 2 - 4 above.

But still no success.

Any help appreciated. Thanks