# US 2014/0192436 A1 · Method and system for hard disk drive throughput optimization using position error signaling

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- Number: US 2014/0192436 A1
- Document ID: US20140192436A1
- Status: Published application
- Kind: A1
- Application number: 13/736,547
- Filed: 2013-01-08
- Published: 2014-07-10
- Earliest claimed: 2013-01-08
- Assignees: Dell Products L.P.
- Inventors: Haesung Kwon; Frank Widjaja Yu
- Web page: https://patentgrep.com/patent/US20140192436A1

## CPC

- G11B 5/59694: {System adaptation for working during or after external perturbation, e.g. in the presence of a mechanical oscillation caused by a shock}
- G11B 5/5582: {system adaptation for working during or after external perturbation, e.g. in the presence of a mechanical oscillation caused by a shock}
- G11B: INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER (recording measured values in a way that does not require playback through a transducer G01D9/00; recording or playback apparatus using mechanically marked tape, e.g. punched paper tape, or using unit records, e.g. punched or magnetically marked cards G06K; transferring data from one type of record carrier to another G06K1/18; circuits for coupling output of reproducer to radio receiver H04B1/20; gramophone pick-ups or like acoustic electromechanical transducers or circuits therefor H04R)

## Abstract

Systems and methods are provided for throughput optimization of a hard disk drive (HDD) using position error signaling (PES) that includes determining a PES for a HDD mounted in a chassis based on a dynamic disturbance. The method also includes calculating a critical parameter of the PES. The method further includes indicating a mechanical design modification of the HDD or the chassis if the critical parameter of the PES exceeds a pre-defined threshold.

## Claims

### Claim 1

A method for throughput optimization of a hard disk drive (HDD) using position error signaling (PES) comprising:
for each of a plurality of HDDs in an array mounted in a chassis:
determining a PES based on a dynamic disturbance;
calculating a critical parameter of the PES; and
determining a performance parameter;
generating a performance map of the array; and
indicating a mechanical design modification of a particular HDD in the array or the chassis if the critical parameter of the PES for the particular HDD exceeds a pre-defined threshold or the performance parameter for the particular HDD fails to meet a pre-defined tolerance.

### Claim 2 (depends on 1)

The method of claim 1, wherein the critical parameter is a mean.

### Claim 3 (depends on 1)

The method of claim 1, wherein the dynamic disturbance is from a fan associated with the chassis.

### Claim 4 (depends on 1)

The method of claim 1, further comprising:
correlating the PES for the particular HDD to throughput of the particular HDD;
indicating a mechanical design modification of the particular HDD or the chassis based on the correlation between the PES for the particular HDD and the throughput of the particular HDD.

### Claim 5 (depends on 1)

The method of claim 1, further comprising:
correlating the PES for the particular HDD to dynamics of a fan associated with the chassis;
indicating a mechanical design modification of the particular HDD, the fan, or the chassis based on the correlation between the PES for the particular HDD and the fan dynamics.

### Claim 6

(canceled)

### Claim 7 (depends on 6)

The method of claim 6, wherein the performance map comprises a location in the chassis of each of the plurality of HDDs.

### Claim 8 (depends on 6)

The method of claim 6, wherein the performance map comprises a performance ranking of each of the plurality of HDDs.

### Claim 9

(canceled)

### Claim 10 (depends on 1)

The method of claim 1, further comprising:
determining acceleration data for each of the plurality of HDDs based on an on-board acceleration sensor; and
correlating the PES to the acceleration data for each of the plurality of HDDs.

### Claim 11

A hard disk drive (HDD) comprising:
a processor configured to:
for each of a plurality of HDDs in an array mounted in a chassis:
determine a PES for based on a dynamic disturbance;
calculate a critical parameter of the PES; and
determine a performance parameter;
generate a performance map of the array; and
indicate a mechanical design modification of a particular HDD in the array or the chassis if the critical parameter of the PES for the particular HDD exceeds a pre-defined threshold or the performance parameter for the particular HDD fails to meet a pre-defined tolerance.

### Claim 12 (depends on 11)

The HDD of claim 11, wherein the critical parameter is a mean.

### Claim 13 (depends on 11)

The HDD of claim 11, wherein the dynamic disturbance is from a fan associated with the chassis.

### Claim 14 (depends on 11)

The HDD of claim 11, wherein the processor is further configured to:
correlate the PES for the particular HDD to throughput of the particular HDD;
indicate a mechanical design modification of the particular HDD or the chassis based on the correlation between the PES for the particular HDD and the throughput of the particular HDD.

### Claim 15

An information handling system comprising:
a processor;
a hard disk drive (HDD) communicatively coupled to the processor; and
a computer-readable medium communicatively coupled to the processor and having stored thereon instructions configured to, when executed by the processor:
for each of a plurality of HDDs in an array mounted in a chassis:
determine a PES based on a dynamic disturbance;
calculate a critical parameter of the PES; and
determine a performance parameter;
generate a performance map of the array; and
indicate a mechanical design modification of a particular HDD in the array or the chassis if the critical parameter of the PES for the particular HDD exceeds a pre-defined threshold or the performance parameter for the particular HDD fails to meet a pre-defined tolerance.

### Claim 16 (depends on 15)

The system of claim 15, wherein the critical parameter is a mean.

### Claim 17 (depends on 15)

The system of claim 15, wherein the dynamic disturbance is from a fan associated with the chassis.

### Claim 18 (depends on 15)

The system of claim 15, wherein the instructions are further configured to:
correlate the PES for the particular HDD to throughput of the particular HDD;
indicate a mechanical design modification of the particular HDD or the chassis based on the correlation between the PES for the particular HDD and the throughput of the particular HDD.

### Claim 19 (depends on 15)

The system of claim 15, wherein the instructions are further configured to:
correlate the PES for the particular HDD to dynamics of a fan associated with the chassis;
indicate a mechanical design modification of the particular HDD, the fan, or the chassis based on the correlation between the PES for the particular HDD and the fan dynamics.

### Claim 20

(canceled)