Adaptive and in-situ load/unload damage estimation and compensat

Details Adaptive and in-situ load/unload damage estimation and compensat Adaptive and in-situ load/unload damage estimation and compensat

1996-12-10

1999-10-26

Psitos, Aristotelis M.

Dynamic magnetic information storage or retrieval

General processing of a digital signal

Data verification

360105, G11B 509, G11B 554

Patent

active

059738707

ABSTRACT:
The present invention overcomes the problems that accompany the use of ramps to load and unload transducer carrying sliders in rigid magnetic disk data storage devices. The tracks in the region where the slider loads and unloads are read and the errors recorded following each slider loading operation. One technique is to track the error increase and identify imminent device failure when the rate of error increase during a given number of the most recent slider load cycles exceeds a threshold value. In another mode, a dedicated sequence of tracks is recorded at an increased linear density to assure that read errors occur to enable a more effective comparative evaluation. This makes possible a two stage evaluation, a first threshold number of errors indicative of degrading performance which initiates lower actuator velocity to inhibit further degradation and a second threshold error quantity that indicates imminent catastrophic failure and triggers a warning to the system user. To make the analysis more meaningful, certain errors may be ignored, such as simpler errors or the full number of errors in a cluster that may be the result of a single event.

REFERENCES:
patent: 3704363 (1972-11-01), Salmassy et al.
patent: 4969139 (1990-11-01), Azumatani et al.
patent: 5227212 (1993-07-01), Ahlert et al.
patent: 5351156 (1994-09-01), Gregory et al.
patent: 5513160 (1996-04-01), Satch et al.

Affiliated with

Also associated with

Rating

Adaptive and in-situ load/unload damage estimation and compensat does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Adaptive and in-situ load/unload damage estimation and compensat, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Adaptive and in-situ load/unload damage estimation and compensat will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-771166