Disk drive that performs cold writes to erased buffer

Details Disk drive that performs cold writes to erased buffer Disk drive that performs cold writes to erased buffer

2007-02-27

2007-02-27

Nguyen, Hoa T. (Department: 2627)

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

C360S057000, C360S072200

Reexamination Certificate

active

11157587

ABSTRACT:
A disk drive includes a rotatable data storage disk, a transducer, an actuator, and a controller. The transducer is configured to read and write data on the disk. The actuator is configured to position the transducer relative to defined portions of the disk. The controller is configured to write a predetermined magnetic polarity pattern on a buffer portion of the disk to erase data thereon. The controller also determines whether the disk drive has reached a threshold operating temperature, and to selectively direct data from a host device, which is addressed for an associated original block address on the disk, to be written to the buffer portion of the disk when the disk drive has not reached the threshold operating temperature. The controller later copies the data from the buffer portion of the disk to the original block address on the disk and then erases the data from the buffer portion of the disk.

REFERENCES:
patent: 5461603 (1995-10-01), Otsuka
patent: 2003/0081337 (2003-05-01), Tanimoto
patent: 2004/0264028 (2004-12-01), Ishii et al.

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