I have been running a Dual-Boot Setup of XP Pro and WIN 7 successfully
for some weeks while I get familiar with WIN 7.
Recently I have almost exclusively been booting into WIN 7.
In this D.B. Setup The booted OS appers as Primary Partition on the C:
drive with the non-active OS as "Unallocated Space " on the D: drive.
This all happens on the No.1 Hard Drive.
No2 Hard Drive has been partitioned into several Partitions , the
First one as a Primary Partition with the remaining Partitions as
Today , when I booted into WIN 7 , there was no sign of the second
hard drive and its Partitions even although both drives ( Serial
Drives) were recognised in the initial part of the Bios screen during
When I looked in Disk Management , I saw that the first Partition on
the second hard drive appeared normally as a Primary Partition but
that all remaing space on this drive was shown as "Unallocated Space"
I then re-booted into the XP OS .
This showed the second hard drive and all its Partitions normally ,
i.e. with its first Partition as the Primary and all subsequent ones
as Logical Drives.