if by "allocation" you mean that your BIOS does not recognize the entire
volume of your physical hard drive
restart your pc and hit the button to enter setup (usually 'del' or f10).
now search to find if there is an unallocated space that is in the hard
drive and is "unused" meaning "hidden" from the user and there for not
"detected" by to o/s.
maybe you were using once windows 95 and the fat partition used for the
windows folder (operating system) was limited to a 2 gb size.
now there should be a "default" selection option somewhere in the hard disk
detection page (depending on your BIOS version and type).
once you managed to allocate the "hidden" volume of your hard disk press f10
to save and exit and insert the boot diskette of your os that contains
fdisk.exe in it.
run fdisk and give the remaining volume a drive letter or letters in the
extended partition. restart after saving and then format the new drive
(letter) to the desired file allocation table.
BTW this can be quickly and easily done with the Partition Magic boot
diskette.
hope this helped you.
give me your feed back please.
Eli