Controller for hard disk drive having DWFT (data wedge...

Details Controller for hard disk drive having DWFT (data wedge... Controller for hard disk drive having DWFT (data wedge...

2011-03-08

2011-03-08

Nguyen, Than (Department: 2187)

Electrical computers and digital processing systems: memory

Storage accessing and control

Hierarchical memories

C711S112000, C360S051000, C360S069000

Reexamination Certificate

active

07904656

ABSTRACT:
A controller and a method for interfacing with a storage medium. Access to a buffer memory via a multi-channel bus is arbitrated. DWFT (Data Wedge Format Table) entries stored in the buffer memory are read and cached in a DWFT cache memory. Data is transferred to and from the storage medium through a storage medium interface. The storage medium interface accesses the sectors of the storage medium based on their physical locations, as defined by the cached DWFT entries. The multi-channel bus includes a DWFT channel to which DWFT cache circuitry is connected. In a DWFT tenure, the DWFT cache circuitry reads the DWFT entries stored in the buffer memory, and caches the DWFT entries in the DWFT cache memory.

REFERENCES:
patent: 6710960 (2004-03-01), Yorimitsu
patent: 6748486 (2004-06-01), Burton et al.
patent: 7609468 (2009-10-01), Pinvidic et al.
patent: 2006/0227447 (2006-10-01), Pinvidic et al.

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