Hello I have tried to I install the Debian operating system on a hard disk partitioned using windows vista hard disk partition manager and I have specified a primary partition of a capacity of 100 GB but the problem was that the Debian installation process doesn't detect the hard partitions and need to create a new partition table. Note: that the partitions are working very well under windows and they are of NTFS format.
Thanks Sincerely yours Ehssan Yassine