Data storage system and method for calibrating same
Disclosed herein are aspects of optical tape technology, tape manufacturing, and tape usage. Methods and systems of tape technology disclose optical tape media including: configurations, formulations, markings, and structure; optical tape manufacturing methods, systems, and apparatus methods and systems including: curing processes, coating methods, embossing, drums, testing, tracking alignment stamper strip; optical tape methods and systems including: pick up head adapted for the disclosed optical tape; and optical tape uses including optical storage media devices for multimedia applications.
1. A data storage system comprising:
an optical media having a defect and a plurality of tracks on each side of the defect exhibiting (i) fields of modulated wobble indicative of defect location information next to the defect and (ii) fields of modulated wobble indicative of data;
an optical pick-up unit configured to read the fields of modulated wobble; and
at least one controller operatively arranged with the pick-up unit and configured to, in response to the pick-up unit detecting defect location information on one side of the defect, command movement of the media in a first direction such that the pick-up unit is positioned adjacent to the fields of modulated wobble indicative of data on the other side of the defect.
2. The system of claim 1 wherein the at least one controller is further configured to command the pick-up unit to refocus on the fields of modulated wobble indicative of data on the other side of the defect.
3. The system of claim 2 wherein, after refocusing, the at least one controller is further configured to command movement of the media in a second direction opposite the first such that the defect approaches the pick-up unit.
4. The system of claim 3 wherein the at least one controller commands movement of the media in the second direction until the pick-up unit detects defect location information or the pick-up unit loses focus.
5. The system of claim 4 wherein the at least one controller is further configured to record a position of the pick-up unit if the pick-up unit detects defect location information.
6. The system of claim 4 wherein the at least one controller is further configured to record a time during which movement is commanded in the second direction.
7. The system of claim 4 wherein the at least one controller is further configured to identify the media as defective if the pick-up unit loses focus and the pick-up unit cannot be refocused.
8. The system of claim 4 wherein the at least one controller is further configured to command movement of the media in the first direction for a predetermined period of time.
9. A method for calibrating a data storage system including (i) an optical pick-up unit and (ii) an optical media having a defect and a plurality of tracks on each side of the defect, the plurality of tracks exhibiting fields of modulated wobble indicative of defect location information next to the defect and exhibiting fields of modulated wobble indicative of data, the method comprising:
reading the fields of modulated wobble;
detecting defect location information on one side of the defect; and
positioning the media such that the pick-up unit is adjacent to the fields of modulated wobble indicative of data on the other side of the defect in response to detecting the defect location information on the one side of the defect.
10. The method of claim 9 further comprising commanding the pick-up unit to refocus on the fields of modulated wobble indicative of data on the other side of the defect.
11. The method of claim 10 further comprising commanding movement of the media such that the defect approaches the pick-up unit.
12. The method of claim 11 wherein movement of the media is commanded until the pick-up unit detects defect location information or the pick-up unit loses focus.
13. The method of claim 12 further comprising recording a position of the pick-up unit if the pick-up unit detects defect location information.
14. The method of claim 12 further comprising identifying the media as defective if the pick-up unit loses focus and the pick-up unit cannot be refocused.
15. A data storage system comprising:
an optical media having a defect and a plurality of tracks on each side of the defect exhibiting (i) fields of modulated wobble indicative of defect location information next to the defect and (ii) fields of modulated wobble indicative of data;
an optical pick-up unit configured to read the fields of modulated wobble; and
at least one controller operatively arranged with the pick-up unit and configured to, in response to the pick-up unit detecting defect location information on one side of the defect, command movement of the media in a first direction such that the pick-up unit is positioned adjacent to the fields of modulated wobble indicative of data on the other side of the defect, command the pick-up unit to refocus on the fields of modulated wobble indicative of data on the other side of the defect, and command movement of the media in a second direction opposite the first such that the defect approaches the pick-up unit until the pick-up unit detects defect location information or the pick-up unit loses focus.
16. The system of claim 15 wherein the at least one controller is further configured to record a position of the pick-up unit if the pick-up unit detects defect location information.
17. The system of claim 15 wherein the at least one controller is further configured to record a time during which movement is commanded in the second direction.
18. The system of claim 15 wherein the at least one controller is further configured to identify the media as defective if the pick-up unit loses focus and the pick-up unit cannot be refocused.
19. The system of claim 15 wherein the at least one controller is further configured to command movement of the media in the first direction for a predetermined period of time.