Broadcom Corporation

Other

Maxtor Corporation

Kevin W McGinnis

John P Mead

Bob R Southerland

Thomas Edmund Fennell

Leroy L Leach

Sean McGinnis

Bob Southerland

Performing multiple Reed-Solomon (RS) software error correction coding (ECC) Galois field computations simultaneously in a RISC processor. Galois field computations are performed in parallel with one another. Processor, memory, and plurality of adders and/or multipliers are implemented appropriately to allow parallel Galois field computations to be performed. Multiplexing can be performed to govern the writing of resultants (generated using the adders and/or multipliers) back to the memory via feedback paths. This approach allows for parallel (as opposed to serial) implementation of the software ECC corrections with minimal area and power impact. In other words, very little space is required to implement this approach is hardware with nominal increase in power consumption, and this slight increase in power consumption provides a significant increase in ECC correction capability using this approach.

Performing multiple Reed-Solomon (RS) software error correction coding (ECC) Galois field computations simultaneously

A disk formatter includes an address module for creating disk block address data corresponding to a disk sector of a disk drive. A sector write module initiates a physical mode write operation to the disk sector that incorporates the corresponding disk block address data.

Disk formatter and methods for use therewith

A retracting tow system is disclosed which provides a spring loaded tow rope which automatically winds the tow rope around an included spool when not in use. The tow rope is affixed to a supplied shaft in a manner which prevents damage to the retracting mechanism while in use. An offset fairlead is also supplied which reduces the force on the shaft during a tow.

Retracting tow system

Clocking Chien searching at different frequency than other Reed-Solomon (RS) ECC decoding functions. An efficient implementation allows for a fast clock signal to govern the operation of the more computationally and time-intensive portions of the error correction code (ECC) time budget. For example, at least one module and/or decoding function within the ECC decoding is governed by using a first clock signal, and at least one other module and/or decoding function (or all the other modules and/or decoding functions) is/are governed by using a second clock signal. In one implementation of Reed-Solomon (RS) decoding, the Chien searching function is operated using a faster clock signal than at least one other RS error correction decoding function thereby allowing for a significant reduction in area and power than other architectural trade-offs.

Clocking Chien searching at different frequency than other Reed-Solomon (RS) ECC decoding functions

Performing multiple Reed-Solomon (RS) software error correction coding (ECC) Galois field computations simultaneously in a RISC processor. A means is presented by which multiple Galois field computations are performed in parallel with one another. Processor, memory, and plurality of adders and/or multipliers are implemented appropriately to allow parallel Galois field computations to be performed. Multiplexing can be performed to govern the writing of resultants (generated using the adders and/or multipliers) back to the memory via feedback paths. This approach allows for parallel (as opposed to serial) implementation of the software ECC corrections with minimal area and power impact. In other words, very little space is required to implement this approach is hardware with nominal increase in power consumption, and this slight increase in power consumption provides a significant increase in ECC correction capability using this approach.

The present invention allows more than two devices to be connected to a single ATA bus. The devices are each assigned a unique identifier, and a controller selects a device by sending a selection command that includes a selection identifier across data lines of the ATA bus to the devices. The devices each receive the selection command and compare the selection identifier to the assigned identifier. The device which matches the selection identifier to its assigned identifier is selected, and the other devices are not selected.

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Berthoud, CO, United States of America

Kevin W McGinnis