Request management for rotating data storage media

Patent metadata

Field	Value
Publication number	US-2015022918-A1
Application number	US-201313943381-A
Country	US
Kind code	A1
Filing date	Jul 16, 2013
Priority date	Jul 16, 2013
Publication date	Jan 22, 2015
Grant date	—

Abstract

A data storage system and associated method of use may generally be directed to a memory cache that stores a plurality of pending read and write requests. A processor can be configured to prioritize the read requests in the memory cache in response to a sensed acoustic or mechanical vibration in a data storage medium.

First claim

1 . An apparatus comprising:
a memory cache storing a plurality of pending read and write requests; and a processor configured to prioritize the read requests and change reading conditions in response to a sensed vibration in a data storage medium.

2 . The apparatus of claim 1 , wherein the memory cache is non-volatile memory.

3 . The apparatus of claim 1 , wherein the processor is connected to the memory cache over a wireless network.

4 . The apparatus of claim 1 , wherein a plurality of sensors are positioned proximal the data storage medium.

5 . The apparatus of claim 1 , wherein the reading conditions comprise rotational speed of the data storage medium.

6 . The apparatus of claim 1 , wherein each read and write request of the plurality of read and write requests has a unique logical and physical block address on the data storage medium.

7 . The apparatus of claim 1 , wherein the vibration is undamped.

8 . The apparatus of claim 1 , wherein the vibration is damped.

9 . The apparatus of claim 1 , wherein the vibration comprises both acoustic and mechanical vibration.

10 . A method comprising:
storing a plurality of pending read and write requests in a memory cache; sensing vibration in a data storage medium; prioritizing the read requests in response to the sensed vibration with at least one processor; and changing a rotational speed reading condition of the data storage medium with the at least one processor in response to the sensed vibration.

11 . The method of claim 10 , wherein the plurality of read and write requests are reorganized in the memory cache by the prioritizing step.

12 . The method of claim 10 , wherein the sensed vibration is qualified for intensity and duration in the prioritizing step.

13 . The method of claim 10 , wherein the read requests are prioritized to maintain a predetermined amount of data in a buffer.

14 . The method of claim 10 , wherein the read requests are exclusively conducted subsequent to the sensed vibration.

15 . The method of claim 10 , wherein at least one write request is conducted after the sensed vibration subsides.

16 . The method of claim 10 , wherein the sensed vibration is undamped from an acoustic source.

17 . The method of claim 16 , wherein the sensed vibration is mechanical and originated from a physically connected component.

18 . A method comprising:
storing a plurality of read and write requests in a memory cache; sensing acoustic vibration in a data storage medium; prioritizing the read requests in response to the sensed vibration with at least one processor; changing a fly height reading condition of a transducing head in response to the sensed vibration; and skipping at least one write request to execute a read request.

19 . The method of claim 18 , wherein the at least one skipped write request is executed after the sensed acoustic vibration subsides.

20 . The method of claim 18 , wherein the acoustic vibration is from a loudspeaker.

Assignees

• Seagate Technology Llc

Inventors

• Qiang Jian
• Yang Kongqun
• Chng Yongpeng
• Lee Tsejen

Classifications

• G11B33/08 Primary

  Insulation or absorption of undesired vibrations or sounds · CPC title

• G11B19/042 Primary

  due to external shock or vibration · CPC title

• G11B5/5582

  system adaptation for working during or after external perturbation, e.g. in the presence of a mechanical oscillation caused by a shock · CPC title

• G11B20/10

  Digital recording or reproducing · CPC title

• G11B2020/10935

  wherein a time constraint must be met · CPC title