Circuit and method for detecting a spin-up wedge and a...

Details Circuit and method for detecting a spin-up wedge and a... Circuit and method for detecting a spin-up wedge and a...

2007-04-17

2007-04-17

Wellington, Andrea (Department: 2627)

Dynamic magnetic information storage or retrieval

General processing of a digital signal

Data clocking

Reexamination Certificate

active

09993869

ABSTRACT:
A servo circuit includes a servo channel and a processor. The servo channel recovers servo data from servo wedges that identify respective data sectors on a data-storage disk. On spin up of the disk, the processor detects a spin-up wedge associated with one of the servo wedges and then detects the servo wedge. Once the servo wedge is detected, a head-position circuit can read the location data from the servo wedge to determine an initial position of the read-write head. By detecting a both a spin-up wedge and a servo wedge to determine an initial head position on disk spin up, such a servo circuit often allows one to increase the disk's storage capacity by reducing the lengths of the spin-up wedges.

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European Search Report for EP 02 25 3882 dated Aug. 28, 2003.
European Search Report for EP 02 25 3883 dated Aug. 28, 2003.

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