Xelly, this means that your pc should have at least 2 hard drives. Partitioning the drive sort of divides a single drive into 2 or more drives. This makes the drive head work harder by continuously moving between the 2 physical locations on the drive platter. The physical movement takes time and it has an effect on overall drive performance for DAW operations.
Partitioning was developed at a time when drive sizes were larger than the bios or OS could handle. For ex., the largest FAT16 partition is 4Gb so when they started developing large drives, early DOS and pre-XP windows needed a way to access the extra space. There are advantages to partitioning, including short-stroking, but these are ineffective for DAW operations.
Best practice for DAWs is to have a relatively small main drive 500 Gb or below for OS and programs, and a larger data drive or drives. Largest single single pc configuration I've worked on had 5 internal drives so far (Gerard's) plus a slew of external firewire and usb2 drives. This was an orchestral sample playback machine and some sections like strings needed their own drives to prevent dropouts.