Disk drive apparatus and seek method

A disk drive apparatus for writing or reading in accordance with a disk recording medium having a Burst Cutting Area at a predetermined position, the apparatus including:

• a pickup unit configured to irradiate laser light to the disk recording medium for the writing or reading and to detect reflected light from the disk recording medium;
• a transporting unit configured to transport the pickup unit in a direction of a radius of the disk recording medium;
• a determining unit configured to input a pull-in signal as a sum signal low component of the reflected light detected by the pickup unit and to generate a determination signal indicating whether the pickup unit is in the Burst Cutting Area or not by using an absolute value of a difference in a direction of a time axis of the pull-in signal;
• and
• a seek control unit configured to start the transportation of the pickup unit to the Burst Cutting Area by using the transporting unit, to monitor the determination signal during the transportation, and to finish the transportation of the pickup unit by the transporting unit based on the determination signal.

A disk drive apparatus for writing or reading in accordance with a disk recording medium having a Burst Cutting Area at a predetermined position, the apparatus comprising:

• pickup means for irradiating laser light to the disk recording medium and for detecting reflected light from the disk recording medium;
• transporting means for transporting the pickup means in a direction of a radius of the disk recording medium;
• determining means for inputting a signal obtained from the reflected light detected by the pickup means and for generating a determination signal indicating whether the pickup means is in the Burst Cutting Area or not by using the signal, the determining means generating the determination signal only after the pickup means is transported by the transporting means to an address in a management information area of the disk recording medium;
• and
• seek control means for starting the transportation of the pickup means to the Burst Cutting Area by using the transporting means for monitoring the determination signal after a lapse of a predetermined time after a start of the transportation, and for finishing the transportation of the pickup means by the transporting means based on the determination signal.

A disk drive apparatus for writing or reading in accordance with a disk recording medium having a Burst Cutting Area at a predetermined position, the apparatus comprising:

• pickup means for irradiating laser light to the disk recording medium for writing or reading and for detecting reflected light from the disk recording medium;
• transporting means for transporting the pickup means in a direction of a radius of the disk recording medium;
• determining means for inputting a signal obtained from the reflected light detected by the pickup means and for generating a determination signal indicating whether the pickup means is in the Burst Cutting Area or not by using the signal, the determining means generating the determination signal by inputting a pull-in signal as a sum signal low component of the reflected light detected by the pickup means and using the absolute value of a difference in a direction of a time axis of the pull-in signal;
• and
• seek control means for starting the transportation of the pickup means to the Burst Cutting Area by using the transporting means, for monitoring the determination signal after a lapse of a predetermined time after a start of the transportation, and for finishing the transportation of the pickup means by the transporting means based on the determination signal.

A disk drive apparatus for writing or reading in accordance with a disk recording medium having a Burst Cutting Area at a predetermined position, the apparatus comprising:

• pickup means for irradiating laser light to the disk recording medium for writing or reading and for detecting reflected light from the disk recording medium;
• transporting means for transporting the pickup means in a direction of a radius of the disk recording medium;
• determining means for inputting a signal obtained from the reflected light detected by the pickup means and for generating a determination signal indicating whether the pickup means is in the Burst Cutting Area or not by using the signal, the determining means generating the determination signal by obtaining a stroke mean value with respect to the absolute value of a difference in a direction of a time axis of a pull-in signal and comparing the stroke mean value with a threshold value;
• and
• seek control means for starting the transportation of the pickup means to the Burst Cutting Area by using the transporting means, for monitoring the determination signal after a lapse of a predetermined time after a start of the transportation, and for finishing the transportation of the pickup means by the transporting means based on the determination signal.

A disk drive apparatus for writing or reading in accordance with a disk recording medium having a Burst Cutting Area at a predetermined position, the apparatus comprising:

• a pickup unit configured to irradiate laser light to the disk recording medium and to detect reflected light from the disk recording medium;
• a transporting unit configured to transport the pickup unit in a direction of a radius of the disk recording medium;
• a determining unit configured to input a signal obtained from the reflected light detected by the pickup unit and to generate a determination signal indicating whether the pickup unit is in the Burst Cutting Area or not by using the signal, the determining unit generating the determination signal only after the pickup unit is transported by the transporting unit to an address in a management information area of the disk recording medium;
• and
• a seek control unit configured to start the transportation of the pickup unit to the Burst Cutting Area by using the transporting unit, to monitor the determination signal after a lapse of a predetermined time after a start of the transportation, and to finish the transportation of the pickup unit by the transporting unit based on the determination signal.

A seek method for a Burst Cutting Area in a disk drive apparatus for writing or reading in accordance with a disk recording medium having the Burst Cutting Area at a predetermined position, the method comprising:

• starting transportation, to the Burst Cutting Area, of pickup means for irradiating laser light to the disk recording medium for the writing or reading and for detecting reflected light from the disk recording medium, with transporting means for transporting the pickup means;
• determining, with a processor, whether the pickup means is in the Burst Cutting Area or not by using an absolute value of a difference in a direction of a time axis of a pull-in signal as a sum signal low component of the reflected light detected by the pickup means;
• and
• finishing the transportation of the pickup means by the transporting means in accordance with the determining step detecting that the pickup means has reached the Burst Cutting Area.

A seek method for a Burst Cutting Area in a disk drive apparatus for writing or reading in accordance with a disk recording medium having the Burst Cutting Area at a predetermined position, the method comprising:

• starting transportation, to the Burst Cutting Area, of pickup means for irradiating laser light to the disk recording medium and for detecting reflected light from the disk recording medium, with transporting means for transporting the pickup means;
• determining, with a processor, whether the pickup means is in the Burst Cutting Area or not by using a signal obtained from the reflected light detected by the pickup means, only after the pickup means is transported to an address in a management information area of the disk recording medium;
• standing by, with the processor, until a detection of a determination result of the determining step, for a predetermined period of time after the starting step starts the transportation;
• and
• finishing the transportation of the pickup means by the transporting means in accordance with the determining step detecting that the pickup means has reached a position of the Burst Cutting Area after a lapse of the predetermined period of time in the standing by step.

A disk drive apparatus, comprising:

• an optical pickup configured to irradiate laser light to a disk recording medium and to detect reflected light from the disk recording medium;
• a transporting unit configured to transport the optical pickup in a direction of a radius of the disk recording medium;
• and
• a processor configured to input a signal obtained from the reflected light detected by the optical pickup and to generate a determination signal indicating whether the optical pickup is in a Burst Cutting Area of the disk recording medium by using the signal, the processor further configured to generate the determination signal by inputting a pull-in signal as a sum signal low component of the reflected light detected by the optical pickup and using the absolute value of a difference in a direction of a time axis of the pull-in signal, the processor further configured to start transportation of the optical pickup to the Burst Cutting Area by using the transporting unit, to monitor the determination signal after a lapse of a predetermined time after a start of the transportation, and to finish the transportation of the optical pickup by the transporting unit based on the determination signal.

A disk drive apparatus, comprising:

• an optical pickup configured to irradiate laser light to a disk recording medium and to detect reflected light from the disk recording medium;
• a transporting unit configured to transport the optical pickup in a direction of a radius of the disk recording medium;
• and
• a processor configured to input a signal obtained from the reflected light detected by the optical pickup and to generate a determination signal indicating whether the optical pickup is in a Burst Cutting Area of the disk recording medium by using the signal, the processor further configured to generate the determination signal by obtaining a stroke mean value with respect to an absolute value of a difference in a direction of a time axis of a pull-in signal and comparing the stroke mean value with a threshold value, the processor further configured to start transportation of the optical pickup to the Burst Cutting Area by using the transporting unit, to monitor the determination signal after a lapse of a predetermined time after a start of the transportation, and to finish the transportation of the optical pickup by the transporting unit based on the determination signal.

A computer-readable medium including computer-executable instructions, wherein the instructions, when executed by a processor, cause the processor to perform a method comprising:

• starting transportation, with a transporting unit, of an optical pickup to a Burst Cutting Area of a disk recording medium, the optical pickup configured to irradiate laser light to the disk recording medium and to detect reflected light from the disk recording medium, the transporting unit configured to transport the optical pickup;
• determining, with a processor, whether the optical pickup is in the Burst Cutting Area by using an absolute value of a difference in a direction of a time axis of a pull-in signal as a sum signal low component of the reflected light detected by the optical pickup;
• and
• finishing the transportation of the optical pickup by the transporting unit in accordance with the determining step determining that the optical pickup is in the Burst Cutting Area.

A computer-readable medium including computer-executable instructions, wherein the instructions, when executed by a processor, cause the processor to perform a method comprising:

• starting transportation, with a transporting unit, of an optical pickup to a Burst Cutting Area of a disk recording medium, the optical pickup configured to irradiate laser light to the disk recording medium and to detect reflected light from the disk recording medium, the transporting unit configured to transport the optical pickup;
• determining, with a processor, whether the optical pickup is in the Burst Cutting Area by using a signal obtained from the reflected light detected by the optical pickup, only after the optical pickup is transported to an address in a management information area of the disk recording medium;
• standing by, with the processor, until a detection of a determination result of the determining step, for a predetermined period of time after the starting step starts the transportation;
• and
• finishing the transportation of the optical pickup by the transporting unit in accordance with the determining step determining that the optical pickup is in the Burst Cutting Area after a lapse of the predetermined period of time in the standing by step.