 - Connect your PS2 HDD to your computer,
 - Run HDD Raw Copy Tool.

 1) Here we have to select the SOURCE. Click FILE and select the dump file (for example : PSBBN032_A2_KHNHDD.IMG);
 2) Click continue...

 1) Here we have to choose the TARGET HDD. Select your PS2 HDD in the list. MAKE SURE IT IS YOUR PS2 HDD AND NOT ONE OF YOUR PC HDDS.
 2) Click continue...

 1) Click continue;
 2) The "warning" message appears. Make sure it shows the name of your PS2 HDD then click Yes

Once the copy is over and successful, the log says "Task complete" and obviously "100% complete". You can close HDD Raw Copy Tool, remove your HDD and put it in your PS2.

After you wrote the dump to your PS2 HDD, your previous partitions become invisible/unreadable.
If they are still physically present (not overwritten by the dump), they can be retreived, by fixing the table of contents.

 - Download and extract WinHIIP,
 - Run WinHIIP.

 Click "Utilities" then "Scan / Repair PS2 Drive"

 Select your PS2 HDD in the list

 Click "Repair" then "Save".