Patent ID: 8949523
Filing Date: 2015-02-03
Classification: G06F

Abstract:
1. An enhanced performance high density disk storage system, comprising: a high density disk drive comprising a magnetic disk for storing electronic data, the drive operative for spinning the disk, reading data from the disk, and writing data to the disk through an I/O head that travels over the disk, wherein the drive experiences I/O performance comprising write seek times when searching for available space to store write data and read seek times when searching for requested read data; and a high density disk controller operative for distributing cache memory locations on the magnetic disk, writing data to the cache memory locations, and reading data from the cache memory locations to enhance I/O performance of the drive through reduced write and read seek times, the controller is further operative to responding to an I/O write request by writing the data to an available cache memory location closest to the location of the I/O head at the time of the I/O write request, detecting an idle or low data access condition for the drive, storing the write data in permanent memory locations, deleting the write data from the cache memory locations during the idle or low data access condition, and determining the idle or low data access condition by determining that access to the drive has fallen below a predetermined threshold for a predetermined time.