Patent ID: 8751836

Claim:
A data storage system with power budget control, comprising: a plurality of data storage devices, a drive enclosure populated with said plurality of data storage devices, a redundantly configured power supply unit positioned in said drive enclosure, wherein said power supply unit includes a first power supply and at least a second power supply together sharing a power load of said drive enclosure and cumulatively meeting power requirements of said drive enclosure, at least one control processor positioned in said drive enclosure in operative connection with said plurality of data storage devices and said redundantly configured power supply unit, said at least one control processor being configured to monitor in real-time a power level available from said redundantly configured power supply unit and power load of said data storage devices, and to dynamically adjust a mode of operation of at least one of said plurality of data storage devices in accordance with data acquired through by real-time monitoring to prevent overload of said power supply unit, said at least one control processor couples a power equivalent of said first power supply to at least one data storage device if actively servicing Input-Output (IO) requests, and couples a power equivalent of said at least second power supply to a remaining portion of said plurality of data storage devices that are neither servicing IO or spinning up.