Hitachi HDS723020BLA642 manual Mechanical positioning, Average seek time including settling

Page 20
Typical Max.

7K200 SATA OEM Specification

4.4.2Mechanical positioning

4.4.2.1 Average seek time (including settling)

Command Type

Typical (ms)

Read

10

Write

11

Table 5. Mechanical positioning performance

Max. (ms)

16

17

Typical and Max. are defined throughout the performance specification as follows:

Average of the drive population tested at nominal environmental and voltage conditions. Maximum value measured on any one drive over the full range of the environmental and voltage conditions. (See section 6.1, "Environment" on page 26 and section 6.2, "DC power requirements" on page 28)

The seek time is measured from the start of motion of the actuator to the start of a reliable read or write operation. A reliable read or write operation implies that error correction/recovery is not employed to correct arrival problems. The Average Seek Time is measured as the weighted average of all possible seek combinations.

max.

Σ (max. + 1 – n)(Tnin + Tnout)

n=1

Weighted Average = ––––––––––––––––––––––––––––

(max. + 1)(max)

Where: max. = maximum seek length n = seek length (1-to-max.)

Tnin

= inward measured seek time for an n-track seek

Tnout

= outward measured seek time for an n-track seek

4.4.2.2Full stroke seek

Command Type

Typical (ms)

Max. (ms)

Read

18.0

30.0

Write

19.0

31.0

Table 6. Full stroke seek time

Full stroke seek time in milliseconds is the average time of 1000 full stroke seeks.

4.4.2.3Single track seek time (without command overhead, including settling)

Command Type

Typical (ms)

Maximum (ms)

Read

1.0

4.0

Write

1.2

4.5

Table 7. Single track seek time

Single track seek is measured as the average of one (1) single track seek from every track in both directions (inward and outward).

4.4.2.4Average latency

Rotational Speed

Time for one revolution

Average Latency

(RPM)

(ms)

(ms)

7200

8.3

4.2

Table 8. Latency time

20/173

Page 19 Page 21
Image 20
Page 19 Page 21
Contents Hitachi Travelstar 7K200 Copyright Hitachi Global Storage Technologies Table of Contents 11.5 14.8 List of Figures List of Tables 7K200 Sata OEM Specification 7K200 Sata OEM Specification General Introduction Abbreviations11 /173 12/173 General caution Drive handling precautionsReferences Outline of the drive Part 1 Functional Specification Control Electronics Head disk assembly dataFixed disk subsystem description Formatted capacity by model number Fixed disk characteristicsFormatted capacity by model number Data sheet Data sheetCylinder allocation Cylinder allocationPerformance characteristics Performance characteristicsCommand overhead Mechanical positioning Average seek time including settlingFull stroke seek Average latencyDrive ready time Drive ready timeMode transition time Operating mode at power onAdaptive power save control Operating modeData loss on power off Write safetyData integrity Write CacheAutomatic reallocation Error recoveryData buffer test ECC Specification Temperature and humidityEnvironment Corrosion testRadiation noise Conductive noiseMagnetic fields Magnetic flux density limitsDC power requirements RequirementsPower consumption efficiency Power consumption efficiencyService life and usage condition ReliabilityData reliability Failure prediction S.M.A.R.TPreventive maintenance Required Power-Off SequencePower switch design considerations Load/unloadTest considerations Mechanical specifications Physical dimensions and weightPhysical dimensions and weight Mounting hole locationsLoad/unload mechanism Connector and jumper descriptionMounting orientation Vibration and shock Operating vibrationRandom vibration Swept sine vibrationNonoperating shock Nonoperating vibrationOperating shock Sound power level Weighted sound powerAcoustics Discrete tone penaltyIdentification labels Electromagnetic compatibilitySubstance restriction requirements SafetyPackaging Cabling Electrical interface specificationsInterface connector Signal definitions Interface connector pins and I/O signals1 TX+ / TX 2 RX+ / RXOut of band signaling COMRESET/COMINIT ComwakePart 2 Interface Specification General IntroductionTerminology Interrupt request Device or HostCheck Power Mode Deviations from StandardPhysical Interface RegistersRegister naming convention Register naming convention and correspondenceCommand register Error RegisterDevice Control Register Device RegisterFeatures Register LBA High RegisterLBA Low Register LBA Mid RegisterStatus Register BSYReset Response Power On Reset PORSoft Reset Software Reset General Operation DescriptionsDiagnostic and Reset considerations Default Register ValuesDiagnostic Codes Reset error register valuesPower-off considerations Required power-off sequenceDevice’s behavior by ATA commands Emergency unloadSector Addressing Mode Power Management FeatureLogical CHS Addressing Mode LBA Addressing ModePower Mode Power Management CommandsStandby/Sleep command completion timing Interface Capability for Power ModesInitial Power Mode at Power On Performance Idle modeActive Idle mode Low Power Idle modeInterface Power Management Mode Slumber and Partial 12.8 S.M.A.R.T. FunctionTransition Time AttributesSecurity Mode Feature Set Password Master Password Revision CodeSecurity Level Operation exampleOperation from POR after User Password is set Initial SettingUser Password Lost Usual OperationCommand Table Attempt limit for Security Unlock commandCommand table for device lock operation Protected Area Function Read Native Max Address ‘F8’h Set Max Address ‘F9’hExample for operation In LBA mode Shipping HDDs from HDD manufacturerSet Max security extension commands Set Max Set Password data contentReassign Function Seek OverlapWrite Cache Function 12.14 48-bit Address Feature Set Non recovered write errorsNon recovered read errors Recovered read errorsSoftware Setting Preservation Feature Set Preserved software settingsNative Command Queuing SettingSCT Action Code Supported Command ProtocolSmart Command Transport SCT Data In Commands Data Out CommandsNon-Data Commands DMA Data Transfer CommandsFirst-parity DMA Commands Read Fpdma Queued Write Fpdma QueuedCommand Descriptions Command setCommand Set Command Set Subcommand Output RegistersInput Registers Input Parameters From The Device Check Power Mode E5h/98hCheck Power Mode Command E5h/98h Device Configuration Overlay B1h Device Configuration Restore subcommand C0hDevice Configuration Freeze Lock subcommand C1h Device Configuration Overlay Command B1hDevice Configuration Identify subcommand C2h Device Configuration SET subcommand C3hDevice Configuration Overlay Data structure DCO error information definition Execute Device Diagnostic 90h Execute Device Diagnostic Command 90hFlush Cache Command E7h Flush Cache E7hFlush Cache EXT Command EAh Flush Cache Ext EAhFormat Track Command 50h Format Track 50h Vendor SpecificOutput Parameters To The Device LBA Low LBA High/MidFormat Unit Command F7h Format Unit F7h Vendor SpecificIdentify Device Command ECh Identify Device EChIdentify device information 90/173 91/173 01FCH 93/173 94/173 95/173 7AB8H =ATA8-AST 98/173 Output Parameters To The Device Sector Count Idle Command E3h/97hIdle E3h/97h Idle Immediate E1h/95h Unload FeatureIdle Immediate Command E1h/95h Initialize Device Parameters Command 91h Initialize Device Parameters 91hRead Buffer Command E4h Read Buffer E4hRead DMA Command C8h/C9h Read DMAC8h/C9hRead DMA Ext Command 25h Read DMA Ext 25hRead Fpdma Queued Command 60h Output Parameters To The Device Feature CurrentFeature Previous Read Fpdma Queued 60hRead Log Ext Command 2Fh Read Log Ext2FhLog address definition Output Parameters To The DeviceExtended comprehensive Smart error log General purpose Log DirectoryError Log version Error log indexExtended Error log data structure Extended comprehensive Smart error LogCommand data structure Error data structureDevice error count Extended Self-test log sectorSelf-test log data structure revision number Extended Self-test log data structureCommand Error Command Error informationSelf-test descriptor index Extended Self-test log descriptor entryCounter Reset Mechanisms Phy Event CounterCounter Identifiers Read Log Ext Log Page 11hPhy Event Counter information Read Multiple Command C4h Read Multiple C4hRead Multiple Ext 29h Output Parameters To The Device Sector Count CurrentRead Native Max Address Command F8h Read Native Max Address F8hRead Native Max Address Ext Command 29h Read Native Max Address Ext 27hRead Sectors Command 20h/21h Read Sectors 20h/21hRead Sectors Ext Command 24h Read Sectors Ext 24hRead Verify Sectors Command 40h/41h Read Verify Sectors 40h/41hRead Verify Sectors Ext Command 42h Read Verify Sectors Ext 42hRecalibrate Command 1xh Recalibrate 1xhPassword Information for Security Disable Password command Security Disable Password F6hSecurity Disable Password Command F6h Security Erase Prepare Command F3h Security Erase Prepare F3hSecurity Erase Unit Command F4h Security Erase Unit F4hErase Unit Information Identifier126/173 Security Freeze Lock Command F5h Security Freeze Lock F5hSecurity Set Password Information Security Set Password F1hSecurity Set Password Command F1h Password Security LevelRevision Code Identifier=User / Security level = HighSecurity Unlock Information Security Unlock Command F2hSecurity Unlock F2h Seek Command 7xh Seek 7xhSense Condition Command F0h Output Parameters To The Device FeatureSense Condition F0h vendor specific Input Parameters From The Device Sector CountSet Features EFh Set Features Command EFh134/173 Set Max Address Command F9h Set Max Address F9h04h Input Parameters From The Device LBA LowInput Parameters From The Device LBA Low HOB=0 Set Max Address Ext Command 37hSet Max Address Ext 37h 7K200 Sata OEM Specification Set Multiple Command C6h Set Multiple C6hSleep Command E6h/99h Sleep E6h/99h14.39.1 S.M.A.R.T. Sub commands 14.39.1.1S.M.A.R.T. Read Attribute Values Subcommand D0hM.A.R.T. Function Set Command B0h 14.39 S.M.A.R.T Function Set B0h14.39.1.4S.M.A.R.T. Save Attribute Values Subcommand D3h Error StatusLBA Mid LBA High14.39.1.6S.M.A.R.T. Read Log Sector Subcommand D5h 14.39.1.7S.M.A.R.T. Write Log Sector Subcommand D6h14.39.1.8S.M.A.R.T. Enable Operations Subcommand D8h Log sector addresses14.39.1.9S.M.A.R.T. Disable Operations Subcommand D9h 14.39.1.10 S.M.A.R.T. Return Status Subcommand DAhDevice Attribute Data Structure Device Attributes Data StructureData Structure Revision Number Individual Attribute Data Structure Individual Attribute Data StructureStatus Flag Definitions Off-Line Data Collection StatusSelf-test execution status 14.39.2.9 Error Logging Capability Current Segment PointerOff-Line Data Collection Capability 14.39.2.8 S.M.A.R.T. CapabilityDevice Attribute Thresholds Data Structure Self-test failure check pointSelf-test completion time Data Structure Checksum14.39.5 S.M.A.R.T. error log sector 14.39.4 S.M.A.R.T. Log DirectoryAttribute ID Numbers Attribute Threshold14.39.5.1 S.M.A.R.T. error log version Error log pointerM.A.R.T. error log sector Error log data structureValue State X0h X1hX2h X3hSelf-test log data structure Self-test log data structureError Reporting M.A.R.T. Error CodesSelective self-test log data structure Selective self-test log data structureStandby Command E2h/96h Standby E2h/96hStandby Immediate Command E0h/94h Standby Immediate E0h/94hWrite Buffer Command E8h Write Buffer E8hWrite DMA Command CAh/CBh Write DMA CAh/CBhWrite DMA Ext Command 35h Write DMA Ext 35hWrite DMA FUA Ext Command 3Dh Write DMA FUA Ext 3DhWrite Fpdma Queued Command 61h Write Fpdma Queued 61hWrite Log Ext Command Write Log Ext 3FhWrite Multiple C5h Write Multiple Ext Command 39h Write Multiple Ext 39hWrite Multiple FUA Ext Command CEh Write Multiple FUA Ext CEhWrite Sectors Command 30h/31h Write Sectors 30h/31hWrite Sectors Ext Command 34h Write Sectors Ext 34hWrite Uncorrectable Ext Command 45h Write Uncorrectable Ext 45h170/173 Timeout Values TimingsErase Unit F4h on 172/173 Copyright Hitachi Global Storage Technologies
Related manuals
Manual 2 pages 13.24 Kb

HDS723020BLA642 specifications

The Hitachi HDS723020BLA642 is a high-performance hard disk drive that exemplifies the balance between reliability and advanced technology, making it an excellent choice for a range of applications, from desktop computers to enterprise storage solutions. This 2TB SATA hard drive is designed to meet the growing data storage needs of users who demand both speed and efficiency.

One of the key features of the HDS723020BLA642 is its impressive rotational speed of 7200 RPM. This speed facilitates faster data access and improved overall performance, significantly enhancing the user experience during data-intensive operations such as gaming, video editing, and large file transfers. Coupled with a SATA III interface, this drive facilitates data transfer rates of up to 6 Gb/s, providing an efficient conduit for moving data quickly between the hard drive and the motherboard.

The drive comes equipped with a large 64 MB cache, which plays a crucial role in buffering read and write operations. This substantial amount of cache memory allows the drive to temporarily store frequently accessed data, leading to reduced latency and enabling smoother multitasking capabilities. Users will benefit from faster load times and reduced wait periods when working with large files.

Reliability is another defining characteristic of the HDS723020BLA642. Hitachi, now a part of Western Digital, has a longstanding reputation for producing durable hard drives. This model incorporates advanced technologies, such as the Fluid Dynamic Bearing (FDB) for quieter operation and better longevity. The drive also features an enhanced error recovery system that minimizes the risk of data loss, making it a suitable option for both personal and professional use.

In terms of power efficiency, the HDS723020BLA642 is designed to consume less power during operation compared to older hard drive models. This efficiency not only helps in reducing operational costs but also contributes to a longer lifespan for the drive itself.

Overall, the Hitachi HDS723020BLA642 hard drive combines speed, reliability, and efficiency into a compact package, making it an ideal choice for users needing a substantial amount of storage without compromising on performance. Whether for upgrading an existing system or building a new one, this drive offers a blend of technology and durability that caters to modern storage demands.
Top Page Image Contents