What is an unknown partition??PLease help fast

[swapnilster]

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I am going to install kubuntu 7.0 on my pc.
I have a 80gb hard disk which already has two FAt32 partitions
and a NTFS partition for my windows XP sp2.
THis is the result of sudo fdisk -l command-
Disk /dev/sda: 80.0 GB, 80060424192 bytes
255 heads, 63 sectors/track, 9733 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

Device Boot Start End Blocks Id System
/dev/sda1 * 1 2531 20330226 c W95 FAT32 (LBA)
/dev/sda2 2532 8759 50026410 f W95 Ext'd (LBA)
/dev/sda3 8760 9732 7815622+ 77 Unknown
/dev/sda5 2532 5081 20482843+ b W95 FAT32
/dev/sda6 5082 8759 29543503+ 7 HPFS/NTFS

What is the 8Gb unknown partition?It is a healthy one as per disk management in windows/
Does it have something to do with windows?
can I install linux on that partition without affecting my windows xp??PLease help me.

[devils casper]

What is the 8Gb unknown partition?It is a healthy one as per disk management in windows/
Does it have something to do with windows?
can I install linux on that partition without affecting my windows xp?

did you create that partition yourself? ID 77 means, its a VNDI partition and used by Novell only.
delete this partition and install Linux in it.

[swapnilster]

No I did not create the partition.My assembled pc was prepartitioned.Thanks a lot for all the help you have given to me.