Ac/dc power supply, a method of delivering dc power at multiple voltages and a computer data storage system employing the power supply or the method

A method of delivering DC power at multiple voltages, comprising:

• receiving a primary power supply;
• converting said primary power supply to a secondary power supply;
• providing power at a first DC voltage rail employing said secondary power supply;
• providing power at a second DC voltage rail employing said secondary power supply;
• and
• dynamically transferring available power between said first DC voltage rail and said second DC voltage rail in response to loads coupled to said first DC voltage rail and said second DC voltage rail.

A computer data storage system, comprising:

• multiple disk drives configured to store data;
• a data interface configured to provide access to said disk drives for writing and reading data;
• and
• an AC/DC power supply configured to provide DC power for said computer data storage system, including:
• a power interface configured to receive an AC primary power supply;
• a transformer having a primary winding couplable to said AC primary power supply via said power interface and a secondary winding inductively couplable to said primary winding;
• and
• multiple DC voltage rails coupled to said secondary winding at designated locations and configured to deliver power to said multiple disk drives coupled thereto, each of said DC voltage rails configured to dynamically transfer therebetween an available portion of said power in response to changes in current requirements for said multiple disk drives.