Hi , I have the same questions about my drive ( WD15AERS )
I'm using XP SP2 and W7 and wanted this 1.5TB drive to store data.
I put the the drive and then formated it with W7. Now it looks like it's working with both systems but I wonder if the size is correct ( I get 1.36TB / 1397.26GB ) and I thougt that advanced format drive would be bigger for about 10% than standard drives.
I haven't aligned the drive yet but as I formated it with W7 I think it's useless to do it... Maybe someone as any answer about it.
I'll try to do it and thes post my feedback here.