Backed up data on slave Gone

Before re-installing 'xp' i backed up a lot of data on a Slave Drive (D) , (C) is my System HDD,

Right, i took out the 'ide' cable and power to the Slave, and reformatted and reinstalled XP on C: .. After i installed 'xp' i then connected the Slave Drive, as i have done many times before, except.. 1. It was not in Windows Explorer, C: was there, of course, and E: was there, (my DVD drive) 2. In Computer Management Console, the Slave drive was there, but it was labelled as 'Unallocated Space' 3. During boot up, my PC recognises that there are 2 HD's as it asks me to press F1 to save the changes 4. The Slave drive is 10 gig, and on 1 boot up, it was labelled as 254,000mb on the 'press F1 to save changes' screen ?

I darent do anything like, 'initialise' the HD in the Computer management console, just in case i wipe whatever data might be left on the hard drive, Can someone please tell me why this Reinstallation has gone a bit Pear shaped, as ive done nothing different to the 5 or 6 other times ive reinstalled and saved stuff to the Slave prior to Reinstalling 'xp'

Thanks a lot - Fred C

Compaq Deskpro 650mhz, running 'xp pro' no sp2 , Maxtor 80 gig hdd, and slave is maxtor 10gig

The Slave hard drive is in device manager when i go to control options-system-device manager ??