System and method for preventing direct access data storage system data loss from mechanical shock during write operation
Disk drive having optimized off-track compensation
Off-track write protection method and system for induced mechanical disturbance on a disk drive
Magnetic disk apparatus with data track reassigning function
Disk drive with adaptive channel optimization Patent #: 6404570
ApplicationNo. 09887749 filed on 06/21/2001
US Classes:360/60, Recording-or erasing-prevention360/75, Controlling the head360/77.12, Elongated web carrier (i.e., tape)360/53Data verification
ExaminersPrimary: Hudspeth, David
Assistant: Rodriguez, Glenda P.
Attorney, Agent or Firm
International ClassesG11B 1504
AbstractA method and system are described for preventing data loss from an off-track write condition in a disk drive. In accordance with exemplary embodiments of the present invention, the disk drive comprises a disk surface comprising a first track and a second track adjacent to the first track, and a head for writing data to and reading data from the first and second tracks. The method of recovering from the off-track write condition comprises the steps of receiving a write command to write a first series of data blocks on the first track. Before writing the first series of data blocks, a second series of data blocks stored in the second track is read and stored in a data buffer. Writing the first series of data blocks on the first track is initiated, and while writing the first series of data blocks, detecting a signal indicating the head may have wandered toward the second track and in response to the signal: aborting the writing of the first series of data blocks; repositioning the head on the first track and performing track following; writing at least a portion of the first series of data blocks to the first track; and writing at least a portion of the second series of data blocks, stored in the data buffer, to the second track.