HI Fellows:

I am using Fedora Core 4 installed on 4GB SCSI drive and 80-GB NTFS drive installed with windows xp. My SCSI drive with linux is almost full and I mount NTFS drive with read or writ options . But I am unable to delete, copy/past or moved any file from NTFS drive to Linux drive...(otherwise I have 9 partitions in NTFS drive) So, I decided to convert my NTFS drive to Linux Drive to solve my capacity problems... but I do not know the way to do this...

If anyone knows please tell me .... Also tells me that it is possible or not.. it is not possible then tell me other ways to solve my capacity problem.

you can reformat it to any filesystem you want to use (this will erase everything.) then I would make the big drive your /home partition. thats how I'm set up a smaller system drive and a larger /home drive; that way you have reserved space for the system & your personal files. so running out of space in your home dir won't mess up your system & messing up your system won't make your home dir unavailable. of course my idea assumes you have realized what crap windows and ntfs are and are willing to get rid of them. if you are saying you want to change the filesystem without erasing everything; I don't think it can be done, and even if it could it wouldn't work with windows anymore anyways.

Edit:
4Gb! no wonder it's full with a system drive that small I would split the 80Gb drive into 2 partitions: a 60Gb /home and a 20Gb /usr (you probably don't need that much space for /usr but that's how I would split it.) Oh, and if you like my idea I can show you how to do it.

You can try mkfs command. You will lose your data on the ntfs filesystem you want to convert.
mkfs -t ext3 <your device or mount point>
check the man page for more info.
Cheers.

Save your data first to CD-R or DVD-R, then reformat that drive in ext3, create additional mount points, and mount them there.