Electronic system with media scan mechanism and method of operation thereof
View Patent ↗An apparatus includes: a media; a head over the media; a read channel, coupled to the head, configured to extract data from the media; control circuitry, coupled to the read channel, configured to execute a read command; and wherein the read channel is further configured to: generate, based on extracting the data from the media, a data condition indicator, and provide, for use by the control circuitry, the data and the data condition indicator.
1. An apparatus comprising:
a media;
a head over the media;
a head actuation motor coupled to the head;
control circuitry, coupled to the head actuation motor, configured to position the head; and
a read channel, coupled to the control circuitry, configured to generate a position error signal (PES) of the head;
wherein the control circuitry is further configured to:
detect a head disk interaction (HDI) based at least in part on the PES;
monitor a retry count to deallocate a data track or log a transient error; and
generate a media map of locations in the media based at least in part on the detected HDI.
2. The apparatus as claimed in claim 1 wherein the control circuitry is further configured to identify a sector location of the detected HDI.
3. The apparatus as claimed in claim 1 wherein the control circuitry is further configured to generate a filtered PES by applying a band pass filter to the PES.
4. The apparatus as claimed in claim 3 wherein the control circuitry is further configured to generate an off-track amplitude from the filtered PES and detect the HDI based on the filtered PES.
5. The apparatus as claimed in claim 1 wherein the control circuitry is further configured to detect the HDI based on a peak amplitude of the PES.
6. The apparatus as claimed in claim 1 wherein the control circuitry is further configured to analyze a data track by monitoring the PES between servo sectors.
7. The apparatus as claimed in claim 1 wherein the media map identifies a sector location, on the media, of the detected HDI when the PES exceeds a threshold.
8. The apparatus as claimed in claim 1 wherein the control circuitry is further configured to apply a threshold to determine a severity of the detected HDI.
9. The apparatus as claimed in claim 1 wherein the control circuitry is further configured to detect the HDI using a plurality of thresholds of different magnitudes of the PES.
10. The apparatus as claimed in claim 1 wherein the control circuitry is further configured to detect the HDI by applying a moving window to detect a localized signature of the PES indicative of the HDI.
11. A method of operating an apparatus, the method comprising:
flying a head over a media;
controlling a head actuation motor for positioning the head over the media;
detecting a head disk interaction (HDI) based at least in part on a position error signal (PES) of the head;
monitoring a retry count for deallocating a data track or logging a transient error; and
generating a media map of locations in the media having the PES based at least in part on the detected HDI.
12. The method as claimed in claim 11 wherein identifying the location of the detected HDI includes identifying a sector location on a data track.
13. The method as claimed in claim 11 wherein analyzing the PES includes generating a filtered PES.
14. The method as claimed in claim 13 wherein analyzing the PES includes generating an off-track amplitude from the filtered PES and detecting the HDI based on the filtered PES.
15. The method as claimed in claim 11 wherein analyzing the PES includes detecting the HDI based on a peak amplitude of the PES.
16. The method as claimed in claim 11 wherein analyzing the PES includes analyzing a data track including monitoring the PES between servo sectors.
17. The method as claimed in claim 11 wherein identifying a location of the detected HDI includes generating a media map for identifying a sector location, on the media, when the PES exceeds a threshold.
18. The method as claimed in claim 11 further comprising applying a threshold to the PES for determining a severity of the detected HDI.
19. The method as claimed in claim 11 further comprising applying a plurality of threshold of different magnitudes to the PES for detecting the HDI.
20. The method as claimed in claim 11 wherein detecting the HDI includes applying a moving window for detecting a localized signature of the PES indicative of the HDI.
21. An apparatus comprising:
a media;
a head over the media;
a head actuation motor coupled to the head;
control circuitry, coupled to the head actuation motor, configured to position the head; and
read channel, coupled to the control circuitry, configured to generate a position error signal (PES) of the head;
wherein the control circuitry is further configured to:
analyze a data track by monitoring the PES between servo sectors;
detect a head disk interactions (HDI) based at least in part on the PES; and
generate a media map of locations in the media based at least in part on the detected HDI.
22. A method of operating an apparatus, the method comprising:
flying a head over a media;
controlling a head actuation motor for positioning the head over the media;
analyzing the PES includes analyzing a data track including monitoring a position error signal (PES) between servo sectors;
detecting a head disk interaction (HDI) base at least in part on the PES of the head; and
generating a media map of locations in the media having the PES based at least in part on the detected HDI.
23. An apparatus comprising:
a media;
a head over the media;
a head actuation motor coupled to the head;
control circuitry, coupled to the head actuation motor, configured to position the head; and
a read channel, coupled to the control circuitry, configured to generate a position error signal (PES) of the head;
wherein the control circuitry is further configured to:
detect a head disk interaction (HDI) based at least in part on the PES;
detect the HDI using a plurality of thresholds of different magnitudes of the PES; and
generate a media map of locations in the media based at least in part on the detected HDI.
24. An apparatus comprising:
a media;
a head over the media;
a head actuation motor coupled to the head;
control circuitry, coupled to the head actuation motor, configured to position the head; and
a read channel, coupled to the control circuitry, configured to generate a position error signal (PES) of the head;
wherein the control circuitry is further configured to:
detect a head disk interaction (HDI) based at least in part on the PES;
detect the HDI by applying a moving window to detect a localized signature of the PES indicative of the HDI; and
generate a media map of locations in the media based at least in part on the detected HDI.