Browse Prior Art Database

Seek Ahead operation

IP.com Disclosure Number: IPCOM000013082D
Original Publication Date: 2000-Feb-01
Included in the Prior Art Database: 2003-Jun-12

Publishing Venue

IBM

Abstract

Disclosed is a method of starting a seek operation for a command which is queued before a completion of current operation under queued random operation. This method reduce a command overhead to start seek and improve a command handling performance. A distinctive feature of this method is to start seek operation before a completion of current disk read/write operation. To achieve this, a Hard Disk Controller(HDC) includes a function to detect a servo sector which is set by software prior to start operation and a function to inform the event (Following Complete: FCOMP) to software. The following procedure describes a current method of starting seek operation for a command which is queued. 1. Wait Drive Complete(DCOMP) event to detect a completion of disk read/write.