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HGST HUS724040ALS640 User Manual

HGST HUS724040ALS640
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HGST Ultrastar 7K4000 (SAS) Hard Disk Drive Specification
Ultrastar 7K4000
3.5" SAS 6Gb Hard Disk Drive
Models: HUS724040ALS640
HUS724040ALS641
HUS724030ALS640
HUS724030ALS641
HUS724020ALS640
HUS724020ALS641
Version: 1.8
April 14, 2016
Warning: Printed copies of this document are considered current only on the date of print. Replacement and disposal
of down-level versions is the responsibility of the document holder.

Table of Contents

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HGST HUS724040ALS640 Specifications

General IconGeneral
Capacity4 TB
InterfaceSATA 6 Gb/s
RPM7200 RPM
Cache64 MB
Average Latency4.16 ms
Load/Unload Cycles300, 000
MTBF2, 000, 000 hours
Warranty5 years
Form Factor3.5-inch
Non-Recoverable Read Errors per Bits Read1 per 10^14 bits read

Summary

General

Caution

Highlights safety warnings related to shock and ESD (Electrostatic Discharge) and user responsibility.

Drive Characteristics

Performance characteristics

Describes drive performance metrics: mechanical positioning, seek time, latency, and transfer speed.

Environment

Temperature and humidity

Specifies operating, shipping, and storage conditions for temperature and humidity.

DC Power Requirements

Power Supply Current, Average and Peak

Lists typical current and power requirements for various operating states.

Reliability

Data Reliability

Discusses uncorrectable data error probability and LDPC channel implementation.

Failure prediction (S.M.A.R.T)

Explains SMART parameters used for failure prediction and drive status.

MTBF (Mean Time Between Failure)

States the target MTBF value of 2.0 Million hours.

Vibration and Shock

Operating vibration

Details random and swept sine vibration levels during operation, ensuring no errors.

Nonoperating vibration

Specifies vibration levels that the drive can withstand without damage.

Operating shock

Defines shock criteria for the drive during operation to avoid errors.

Nonoperating shock

Specifies shock criteria that the drive can withstand without non-recoverable errors.

Electromagnetic Compatibility

Radiated and Conducted EMI

Lists compliance with EMI standards like CISPR22, EN 55022, FCC, etc., all Class B.

Safety Standards

UL and C-UL Standard Conformity

Certifies US and Canadian safety compliance for Information Technology Equipment.

SAS Attachment

SAS Features

Lists supported SAS features including compliance, protocol, and dual port operation.

SCSI Command Set

SCSI Commands Supported

Lists supported SCSI commands with their operation codes and page references.

SCSI Status Byte

Format of the SCSI STATUS byte

Explains the possible values for the status byte and additional sense information.

Additional information

SCSI Protocol

Describes operating conditions preventing SCSI command execution and their priority.

Priority of SCSI Status Byte Reporting

Details the priority order of internal conditions affecting command execution.

Command Processing During Execution of Active I/O Process

Describes how commands are handled when other I/O processes are active.

Unit Attention Condition

Lists conditions that cause a unit attention condition for initiators.

Internal Error Condition

Describes conditions that lead to an internal error during drive operation.

Degraded Mode

Defines the degraded mode and its causes, such as spindle motor or configuration failures.

SCSI Sense Data

Appendix. UEC list

Unit Error Codes

Lists Unit Error Codes (UEC) and their associated descriptions for error reporting.

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