Data storage device adjusting command rate profile based on operating mode

Patent metadata

Field	Value
Publication number	US-9959209-B1
Application number	US-73007810-A
Country	US
Kind code	B1
Filing date	Mar 23, 2010
Priority date	Mar 23, 2010
Publication date	May 1, 2018
Grant date	May 1, 2018

Abstract

A data storage device is disclosed comprising a non-volatile memory. A command rate profile is initialized, wherein the command rate profile defines a limit on a number of access commands received from a host as a function of an internal parameter of the data storage device. The command rate profile is adjusted in response to a change in operating mode.

First claim

What is claimed is:

1. A data storage device comprising:
a non-volatile memory; and
control circuitry operable to:
initialize a command rate profile, wherein the command rate profile defines a limit on a number of access commands received from a host as a function of an internal parameter of the data storage device;
detect a change in operating mode independent of a user configurable parameter; and
adjust the function of the command rate profile in response to the detected change in operating mode.

2. The data storage device as recited in claim 1 , wherein the control circuitry is operable to:
detect the change in operating mode by evaluating a history of host commands to estimate whether the data storage device will be accessed in one of a random mode and a sequential mode; and
adjust the command rate profile when changing between the random mode and the sequential mode.

3. The data storage device as recited in claim 1 , wherein the command rate profile defines a limit on the number of write commands received from the host.

4. The data storage device as recited in claim 1 , wherein the internal parameter comprises a write cache for caching data blocks of write commands received from the host.

Assignees

• Burton Scott E
• Coker Kenny T
• Fallone Robert M
• Western Digital Tech Inc

Inventors

• Burton Scott E
• Coker Kenny T
• Fallone Robert M

Classifications

• G06F3/0659 Primary

  Command handling arrangements, e.g. command buffers, queues, command scheduling · CPC title

• G06F3/0679

  Non-volatile semiconductor memory device, e.g. flash memory, one time programmable memory [OTP] · CPC title

• G06F3/0629

  Configuration or reconfiguration of storage systems · CPC title

• G06F12/0866 Primary

  for peripheral storage systems, e.g. disk cache · CPC title

• G06F3/0674

  Disk device · CPC title