公开(公告)号：US20180189185A1

公开(公告)日：2018-07-05

申请号：US15394558

申请日：2016-12-29

Applicant: Seagate Technology LLC

Inventor： CheeHou Peng ,  ThanZaw Thein ,  WenXiang Xie ,  PohSeng Lim

IPC: G06F12/0891

CPC classification number: G06F12/0873 ,  G06F12/0868 ,  G06F2201/885 ,  G06F2212/1024 ,  G06F2212/1044 ,  G06F2212/462 ,  G06F2212/502

Abstract: A data storage device includes a media cache and a main data store optimized for sequential reads and organized into bands. When the data storage device receives a read request from a host computing system, the requested data may be fragmented across the media cache and the main data store, causing constrained read throughput. Band rewrite operations to improve read throughput are selected based on a hit tracking list including a hit counter associated with each band on the main data store. The hit counter tracks the number of times a host computing system has requested data in logical block addresses corresponding to the various bands. The data storage device may select bands for band rewrite operations based on the number of hits in the associated hit tracking counters.