Abstract: Systems and methods are disclosed for monitoring object storage in a data storage system. A storage device tray assembly includes a plurality of data storage bays configured to receive data storage devices, a plurality of data storage devices mounted in the plurality of data storage bays, and an interface expander device communicatively coupled to each of the data storage devices over a first communication interface. The interface expander device may include non-volatile memory storing object storage monitor code and operating system code, and one or more processors configured to perform port or switch initialization for communications to the plurality of data storage devices and execute the operating system code and the object storage monitor code to provide object storage monitor functionality for the plurality of data storage devices.

Abstract: A disk drive includes a disk having a disk surface. The disk surface has a plurality of tracks arranged in an embedded servo format including servo track segments for storing servo data and data track segments for storing user data. Data from the disk surface is read to produce a time-multiplexed analog read signal that during a revolution of the disk represents analog read servo data during each of a first set of time intervals and represents analog read user data during each of a second set of time intervals. The disk drive further includes a controller and a channel integrated circuit chip. The controller includes a controller port. The channel integrated circuit chip includes an input for receiving the time-multiplexed analog read signal. The time-multiplexed analog read signal is processed to generate data symbols representing recovered servo data and recovered user data.

Abstract: An optimum chip topography for a MOS LSI packet network interface circuit, including electrical interface and input/output circuitry disposed around the periphery of said chip and forming approximately a quadrilateral framework surrounding the remainder of the circuitry; a read only memory (ROM) disposed in one corner of the interface framework; a microcontroller disposed adjacent to the ROM and along part of a first side of the interface framework; direct memory access (DMA) circuitry disposed adjacent to the microcontroller and in a second corner of the interface framework; transmitter circuitry disposed adjacent to the DMA and microcontroller circuitry and along part of a second side of the interface framework; receiver circuitry disposed adjacent to the transmitter circuitry and in a third corner of the interface framework; data access line circuitry comprising part of a third side of the interface framework, and situated adjacent to the receiver circuitry; timing/counting circuitry disposed adjacent to t