Self-Servo Write Non-Reference Head Position Measuring

摘要

An approach to self-servo writing (SSW) in a hard disk drive involves receiving a first signal from a first reader reading from a first disk media surface while concurrently receiving a second signal from a second reader reading from a second disk media surface, where the relative position of the first and second readers is determinable based on the first and second signals. For example, the first signal may correspond to the SSW reference head while the second signal may correspond to any one of the other SSW non-reference heads, during a SSW bank writing procedure, whereby the relative position and/or motion between the reference and non-reference heads can have a deleterious effect on the servo track writing quality. Because multiple different non-reference heads may be selected for signal reception and associated position determination, the first and second disk media surfaces may be constituent to different disks.

主权项

1. A method for self-servo writing in a hard disk drive, the method comprising:
selecting a first reader from which to receive a first signal; selecting a second reader from which to receive a second signal; receiving said first signal from said first reader reading from a first disk media surface; and while receiving said first signal, concurrently receiving said second signal from said second reader reading from a second disk media surface different from said first disk media surface; and determining, based on said first signal and said second signal, the position of said second reader relative to said first reader.