Patent TW-376512-B (TW)
Title: Server hard disk drive integrated circuit and method of operation
Inventor: GLOVER KERRY C
IPC: G03D13/00
Filed: 1998-08-18
Granted: 1999-12-11
Abstract: A server hard disk drive integrated circuit (12) is provided for controlling the operation of a server hard disk drive (10) and for processing digital data exchanged between a client (20) and a storage media. The storage media includes a spindle motor for rotating a magnetic disk and a head actuator for positioning a read/write head. The server hard disk drive integrated circuit (12) includes a RAM (30), a disk control circuitry (24), write channel (32), a read channel (34), a servo circuit (36), a motor control circuit (40), and a DSP (26). The disk control circuitry (24) receives and stores requests provided from the client (20) and exchanges digital data with the client (20) and stores the digital data in RAM (30). The write channel (32) generates a write signal during a write operation, and the read channel (34) generates a read signal and an intermediate read signal during a read operation. The servo circuit (36) generates a servo signal during a servo operation, and the motor control circuit (40) receives a motor control input signal and generates a motor control output signal to control the spindle motor and the head actuator. Finally, the digital signal processor (26) initiates the read and write operations as needed to perform the requests of the client. The digital signal processor (26) also performs file management, generates the motor control input signal, and processes the intermediate read signal to generate a read channel parameter. A server hard disk drive integrated circuit for controlling the operation of a server had disk drive and for processing digital data exchanged between a client and a storage media of the server hard disk drive, the storage media for storing computer files and including a spindle motor for rotating a magnetic disk and a head actuator for positioning a read/write head, the server hard disk drive integrated circuit comprising: a data memory operable to store digital data; a disk control circuitry operable to receive and store requests from the client and to exchange digital data with the client, the disk control circuitry operable to control the storage of the digital data in the data memory; a write channel operable to receive and process an inbound digital data signal provided from the data memory during a write operation and to generate a write signal in response that is communicated to the storage media; a read channel operable to receive and process a read signal from the storage media during a read operation and to generate an outbound digital data signal in response, the read channel operable to generate an intermediate read signal while processing the read signal; a servo circuit operable to receive and process a servo wedge signal from the storage media during a servo operation and to generate a servo signal in response; a motor control circuit operable to receive a motor control input signal and to generate a motor control output signal to control the spindle motor and the head actuator; and a digital signal processor operable to initiate read and write operations as needed to perform the requests provided from the client, the digital signal processor operable to perform file management and to generate the motor control input signal in response to receiving the servo signal, the digital signal processor further operable to process the intermediate read signal to generate a read channel parameter.