Hitachi HDS721016CLA682, HCS721050CLA382, A7K2000 Performance characteristics, Command overhead

Page 19

4.5Performance characteristics

Drive performance is characterized by the following parameters:

Command overhead

Mechanical positioning

-Seek time

-Latency

Data transfer speed

Buffering operation (Look ahead/Write cache)

All the above parameters contribute to drive performance. There are other parameters that contribute to the performance of the actual system. This specification defines the characteristics of the drive, not the characteristics of the system throughput which depends on the system and the application.

4.5.1 Command overhead

Command overhead is defined as the time required

from the time H->D Reg FIS w/ command bit is sent by host

to the time

PIO Set Up FIS is sent by device(PIO Read/Write)

DATA FIS is sent by device(DMA Read)

DMA Activate FIS is sent by device(DMA Write)

DMA Set Up FIS is sent by device(NCQ Read/Write)

Seek Start (Read cache not hit or Seek)

The table below gives average command overhead.

Command type (Drive is in quiescent state)

Typical time (ms)

Typical time for NCQ

 

command (ms)

 

 

 

 

 

 

 

 

Read (Cache not hit)

0.5

0.5

 

Read (Cache hit)

0.1

0.2

 

Write

0.015

0.2

 

Seek

0.5

not applicable

 

 

 

 

 

Table 8 Command overhead

- Hitachi hard disk drive specifications –

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Contents Hard Disk Drive Specification Copyright Hitachi Global Storage Technologies Table of contents Read Log Ext 2Fh Security Disable Password F6hIdle Immediate E1h/95h Initialize Device Parameters 91h11.33 Command table for device lock operation Power supply generated ripple at drive power connectorInput Registers of SCT Data Transfer Using Smart 107 103104 105151 Access Time Array Entry Linearly Interpolated 156149 150Selective self-test log data structure Write Multiple FUA Ext Command CEhType and Model# IntroductionCapacity Type Cache Model# Ultrastar CinemaStarGeneral caution GlossaryReferences General features Part 1. Functional specification Control Electronics Head disk assemblyActuator Formatted capacity Default logical drive parameters1TB model Mechanical positioning performance World Wide Name AssignmentWorld Wide Name Assignment Drive Format Drive organizationCylinder allocation Command overhead Performance characteristicsCommand overhead Mechanical positioning Latency Time Drive ready timeAverage latency Single Track Seek TimeOperating modes Operating mode descriptionsMode transition times Mode transition timesDefect flagging strategy Electrical interface Connector locationSignal connector Hitachi hard disk drive specifications2.1 TX+ / TX Signal definitionInterface connector pins and I/O signals Plug Connector pin definition Signal2.4 12V Precharge 2.3 5V PrechargeParameter descriptions Out of band signalingSATATemperature and humidity Temperature and humidityEnvironment Atmospheric condition Corrosion testInput voltage DC power requirementsPower supply current typical Power supply current of 2 Disk modelPower supply current of 1 Disk model Power supply generated ripple at drive power connectorReliability Required Power-Off Sequence Physical dimensions Mechanical specificationsAll dimensions are in millimeters Bottom and side views with mounting hole locations Hole locations Physical DimensionsConnector locations Connector locationsHeads unload and actuator lock Drive mountingSwept sine vibration Linear Vibration and shockOperating vibration Random vibration LinearSwept sine vibration Nonoperating vibrationOperating shock Random vibrationSinusoidal shock wave Nonoperating shockNonoperating Rotational shock Trapezoidal shock waveAcoustics Sound power levelsIdentification labels Safety Bsmi Mark Electromagnetic compatibilityCE Mark Tick MarkPart 2. Interface Specification Deviations From Standard Check Power ModeDownload Comreset response time Streaming Commands TerminologyAlternate Status Register Command registerAlternate Status Register Cylinder High RegisterDevice Control Register Cylinder Low RegisterData Register Device Control RegisterDevice/Head Register Drive Address RegisterDevice/Head Register Drive Address RegisterError Register Error RegisterBit Definitions Icrce CRC Sector Count Register Features RegisterSector Number Register Status Register Status RegisterSoft Reset Software Reset Reset ResponseReset Response Power On Reset PORRegister Initialization Diagnostic and Reset considerationsDefault Register Values Diagnostic CodesLogical CHS Addressing Mode Sector Addressing ModeLBA Addressing Mode Standby timer Power Management FeaturePower Mode Power Management CommandsPower conditions Interface Capability for Power ModesSmart Function Off-line Read Scanning Error LogSelf-test Device Frozen mode Security Mode Feature SetSecurity mode Device Unlocked modeDevice locked mode PasswordMaster Password setting User Password settingUsual Operation Operation from POR after User Password is setAttempt limit for Security Unlock command User Password LostCommand Locked Mode Unlocked Mode Frozen Mode Command TableSecurity Erase Unit Executable Example for operation In LBA mode Host Protected Area FeatureRead Native Max Address F8h Set Max Address F9h Security extensions Write Cache Function Reassign Function Non recovered write errorsNon recovered read errors Recovered read errorsAdvanced Power Management feature set APM Power-up in Standby feature set12 48-bit Address Feature Set Streaming commands Streaming feature SetStreaming Logs Sata Bist Built-in Self Test Sata Interface Power ManagementComreset Preservation Requirements Software Setting PreservationCounter Reset Mechanisms Sata II Optional FeaturesAsynchronous Signal Recovery Device Power Connector Pin 11 DefinitionPhy Event Counter Identifiers Counter IdentifiersIdentifier Mandatory Description Bits Optional Identifier 000h Counter DefinitionsRead LOG EXT Log Page 11h data structure definition Read LOG EXT Log Page 11hCapability definition SCT Command Transport feature SetOverview IntroductionResets SCT Command Nesting and intermingling with Standard commandsOutput Registers of SCT Command Using Smart SCT Command ProtocolCommand Transport Issue SCT Command Using SmartIssue SCT Command Using Write Log Ext Action codes are defined in Table below SCT Action Code ListKey Sector Format Key Sector FormatExtended Status Code Extended Status CodeRead/Write SCT Data Using Read/Write Log Ext Read/Write SCT Data Using SmartData transfer Input Registers of SCT Status Request Using Read Log Ext SCT Status Request Using SmartSCT Status Request Using Read Log Ext Intput Registers of SCT Status Request Using SmartCurrently executing in the background, this Current LBA of SCT command executinBackground. If there is no command Format of SCT Status ResponseData Format of SCT Status Response 205 Byte Reserved 00h 209206 Dword213210 Dword 479214 Byte275 Reserved 00h 511480 Byte32 Vendor SpecificSCT Write Same Outputs SCT Command SetSCT Write Same action code 0002h SCT Write Same InputsHitachi hard disk drive specifications Outputs for Error Error Recovery Control command Inputs Error Recovery Control command action code 0003hError Recovery Control command Onputs Feature Control command Inputs Feature Control Command action code 0004hFeature Control command Outputs Feature Code State Definition Feature Code ListTable ID SCT Data Table Command action code 0005hSCT Data Table command Inputs SCT Data Table command OutputsByte Size Field Name Description Data Format of HDA Absolute Temperature History Table Hitachi hard disk drive specifications 100 PIO Data In commandsNon-Data commands PIO Data Out commandsHitachi hard disk drive specifications 101 First-party DMA commands DMA Data In commands and DMA Data Out commandsHitachi hard disk drive specifications 102 Hitachi hard disk drive specifications 103 Command SetProtocol Command Code Binary Code Bit Hex Protocol Command Hitachi hard disk drive specifications 104Code Binary Code Bit Hex Hitachi hard disk drive specifications 105 Command Set SubcommandCommand code Feature Command Subcommand Hex Register Output Registers Hitachi hard disk drive specifications 106Input Registers Input Parameters From The Device Check Power Mode E5h/98hCheck Power Mode Command E5h/98h Hitachi hard disk drive specifications 107Configure Stream Command 51h Configure Stream 51hHitachi hard disk drive specifications 108 Hitachi hard disk drive specifications 109 Device Configuration Overlay Features register values Device Configuration Overlay B1hDevice Configuration Restore Subcommand C0h Device Configuration Overlay Command B1hHitachi hard disk drive specifications 111 Device Configuration Freeze Lock Subcommand C1hDevice Configuration Identify Subcommand C2h Device Configuration Set Subcommand C3hHitachi hard disk drive specifications 112 Device Configuration Overlay Data structureHitachi hard disk drive specifications 113 DCO error information definitionHitachi hard disk drive specifications 114 Download Microcode Command 92hDownload Microcode 92h Hitachi hard disk drive specifications 115 Hitachi hard disk drive specifications 116 Execute Device Diagnostic 90hDiagnostic Code Execute Device Diagnostic Command 90hHitachi hard disk drive specifications 117 Flush Cache Command E7hFlush Cache E7h Hitachi hard disk drive specifications 118 Flush Cache Ext Command EAhFlush Cache Ext EAh Hitachi hard disk drive specifications 119 Format Track Command50hFormat Track 50h Output Parameters To The Device Sector Number Hitachi hard disk drive specifications 120Cylinder High/Low Hitachi hard disk drive specifications 121 Format Unit Command F7hFormat Unit F7h Hitachi hard disk drive specifications 122 Identify Device Command EChIdentify Device ECh Identify device information Hitachi hard disk drive specifications 123Hitachi hard disk drive specifications 124 Gen1 speed of 1.5Gbps Hitachi hard disk drive specifications 125Write Cache Hitachi hard disk drive specifications 126READ/WRITE DMA Queued Hitachi hard disk drive specifications 127Hitachi hard disk drive specifications 128 Hitachi hard disk drive specifications 129 Reserved Stream Minimum Request Size XxxxH Hitachi hard disk drive specifications 130Current media serial number 0000H=Not supported Hitachi hard disk drive specifications 131Hitachi hard disk drive specifications 132 Hitachi hard disk drive specifications 133 Idle Command E3h/97hIdle E3h/97h Output Parameters To The Device Hitachi hard disk drive specifications 134Hitachi hard disk drive specifications 135 Idle Immediate Command E1h/95hIdle Immediate E1h/95h Hitachi hard disk drive specifications 136 Initialize Device Parameters Command 91hInitialize Device Parameters 91h Hitachi hard disk drive specifications 137 Read Buffer Command E4hRead Buffer E4h Hitachi hard disk drive specifications 138 Read DMA Command C8h/C9hRead DMAC8h/C9h Output Parameters To The Device Sector Count Hitachi hard disk drive specifications 139Hitachi hard disk drive specifications 140 Read DMA Ext Command 25hRead DMA Ext 25h Hitachi hard disk drive specifications 141 Hitachi hard disk drive specifications 142 Read Fpdma Queued Command 60hRead Fpdma Queued 60h Hitachi hard disk drive specifications 143 Hitachi hard disk drive specifications 144 Read Log Ext Command 2FhRead Log Ext 2Fh Log Address Definition Hitachi hard disk drive specifications 145Sector Count Current General Purpose Log Directory Hitachi hard disk drive specifications 146General Purpose Log Directory Extended Error log data structure Extended Comprehensive Smart Error logError log version Error log indexCommand data structure Extended Error log data structureHitachi hard disk drive specifications 148 Hitachi hard disk drive specifications 149 Error data structureSelf-test descriptor index Device error countExtended Self-test log sector Self-test log data structure revision numberExtended Self-test log descriptor entry Hitachi hard disk drive specifications 151Extended Self-test log descriptor entry Command Error information Command ErrorHitachi hard disk drive specifications 152 Read Stream Error Log Read Stream Error logHitachi hard disk drive specifications 153 Hitachi hard disk drive specifications 154 Stream Error Log entryWrite Stream Error Log Write Stream Error logHitachi hard disk drive specifications 155 Sector Time Array Entry Linearly Interpolated Access Time Array Entry Linearly InterpolatedStreaming Performance log Streaming Performance Parameters logHitachi hard disk drive specifications 157 Read Multiple Command C4hRead Multiple C4h Hitachi hard disk drive specifications 158 Read Multiple Ext Command 29hRead Multiple Ext 29h Hitachi hard disk drive specifications 159 Read Native Max Address F8h Hitachi hard disk drive specifications 160Read Native Max Address Ext 27h Hitachi hard disk drive specifications 161Hitachi hard disk drive specifications 162 Hitachi hard disk drive specifications 163 Read Sectors Command 20h/21hRead Sectors 20h/21h Hitachi hard disk drive specifications 164 Hitachi hard disk drive specifications 165 Read Sectors Ext Command 24hRead Sectors Ext 24h Output Parameters To The Device Sector Count Current Hitachi hard disk drive specifications 166Hitachi hard disk drive specifications 167 Read Stream DMA Command 2AhRead Stream DMA 2Ah Hitachi hard disk drive specifications 168 Hitachi hard disk drive specifications 169 Hitachi hard disk drive specifications 170 Read Stream PIO Command 2BhRead Stream PIO 2Bh Hitachi hard disk drive specifications 171 Ccto Error, bit Hitachi hard disk drive specifications 172Hitachi hard disk drive specifications 173 Read Verify Sectors Command 40h/41hRead Verify Sectors 40h/41h Hitachi hard disk drive specifications 174 Hitachi hard disk drive specifications 175 Read Verify Sectors Ext Command 42hRead Verify Sectors Ext 42h Hitachi hard disk drive specifications 176 Hitachi hard disk drive specifications 177 Recalibrate Command 1xhRecalibrate 1xh Security Disable Password Command F6h Security Disable Password F6hHitachi hard disk drive specifications 178 Hitachi hard disk drive specifications 179 Password Information for Security Disable Password commandHitachi hard disk drive specifications 180 Security Erase Prepare Command F3hSecurity Erase Prepare F3h Hitachi hard disk drive specifications 181 Security Erase Unit Command F4hSecurity Erase Unit F4h Erase Unit Information Hitachi hard disk drive specifications 182Hitachi hard disk drive specifications 183 Security Freeze Lock Command F5hSecurity Freeze Lock F5h Security Set Password Command F1h Security Set Password F1hHitachi hard disk drive specifications 184 Hitachi hard disk drive specifications 185 Security Set Password InformationHitachi hard disk drive specifications 186 Security Unlock Command F2hSecurity Unlock F2h Security Unlock Information Hitachi hard disk drive specifications 187Hitachi hard disk drive specifications 188 Seek Command 7xhSeek 7xh Input Parameters From The Device Sector Count Sense Condition command F0hHitachi hard disk drive specifications 189 Sense Condition F0h Vendor specific for CinemastarSet Features Command EFh Set Features EFhHitachi hard disk drive specifications 190 Hitachi hard disk drive specifications 191 Hitachi hard disk drive specifications 192 Set Transfer modeSerial ATA Feature Advanced Power ManagementSet Maximum Host Interface Sector Time Low Power Idle modeLow RPM standby mode Hitachi hard disk drive specifications 193Set Max Address F9h Hitachi hard disk drive specifications 194Set Max Address F9h Hitachi hard disk drive specifications 195 Hitachi hard disk drive specifications 196 Set Max Set Password Feature = 01hSet Max set Password Set Max Set Password data contentsHitachi hard disk drive specifications 197 Set Max Lock Feature = 02hSet Max Lock Hitachi hard disk drive specifications 198 Set Max Unlock Feature = 03hSet Max Unlock F9h Hitachi hard disk drive specifications 199 Set Max Freeze Lock Feature = 04hSet Max Freeze Lock F9h Hitachi hard disk drive specifications 200 Set Max Address Ext Command 37hSet Max Address Ext 37h Hitachi hard disk drive specifications 201 Hitachi hard disk drive specifications 202 Set Multiple Command C6hSet Multiple C6h Hitachi hard disk drive specifications 203 Sleep Command E6h/99hSleep E6h/99h Hitachi hard disk drive specifications 204 Smart Function Set Command B0hSmart Function Set B0h Smart Enable/Disable Attribute Autosave Subcommand D2h Smart SubcommandSmart Read Attribute Values Subcommand D0h Smart Read Attribute Thresholds Subcommand D1hSmart Execute Off-line Immediate Subcommand D4h Smart Save Attribute Values Subcommand D3hHitachi hard disk drive specifications 206 Hitachi hard disk drive specifications 207 Smart Read Log Sector Subcommand D5hSmart Write Log Sector Subcommand D6h Smart Enable Operations Subcommand D8hHitachi hard disk drive specifications 208 Smart Disable Operations Subcommand D9hSmart Return Status Subcommand Dah Smart Enable/Disable Automatic Off-Line Subcommand DBhDevice Attribute Data Structure Hitachi hard disk drive specifications 209Device Attributes Data Structure Data Structure Revision NumberAttribute Name Hitachi hard disk drive specifications 210Individual Attribute Data Structure Individual Attribute Data StructureBit 7 Automatic Off-Line Data Collection Status Hitachi hard disk drive specifications 211Off-Line Data Collection Status Status Flag Definitions Bit DefinitionSelf-test execution status Hitachi hard disk drive specifications 212Off-Line Data Collection Capability Self-test completion time Error Logging CapabilitySmart Capability Self-test failure check pointAttribute Threshold Device Attribute Thresholds Data StructureIndividual Thresholds Data Structure Attribute ID NumbersSmart Log Directory Hitachi hard disk drive specifications 215Smart Log Directory Hitachi hard disk drive specifications 216 Smart summary error log sectorSmart error log version Smart summary error log sectorError log data structure Error log data structureHitachi hard disk drive specifications 217 Hitachi hard disk drive specifications 218 Self-test log data structure Hitachi hard disk drive specifications 219Self-test log data structure Selective self-test log data structure Feature flagsSelective self-test feature flags Hitachi hard disk drive specifications 220Smart Error Codes Error ReportingHitachi hard disk drive specifications 221 Hitachi hard disk drive specifications 222 Standby Command E2h/96hStandby E2h/96h Hitachi hard disk drive specifications 223 Hitachi hard disk drive specifications 224 Standby Immediate Command E0h/94hStandby Immediate E0h/94h Hitachi hard disk drive specifications 225 Write Buffer Command E8hWrite Buffer E8h Hitachi hard disk drive specifications 226 Write DMA Command Cah/CBhWrite DMA Cah/CBh Hitachi hard disk drive specifications 227 Hitachi hard disk drive specifications 228 Write DMA FUA Ext Command 3DhWrite DMA FUA Ext 3Dh Hitachi hard disk drive specifications 229 Hitachi hard disk drive specifications 230 Write DMA Ext Command 35hWrite DMA Ext 35h Hitachi hard disk drive specifications 231 Hitachi hard disk drive specifications 232 Write Fpdma Queued Command 61hWrite Fpdma Queued 61h Hitachi hard disk drive specifications 233 Hitachi hard disk drive specifications 234 Write Log Ext Command 3FhWrite Log Ext 3Fh Hitachi hard disk drive specifications 235 Hitachi hard disk drive specifications 236 Write Multiple Command C5hWrite Multiple C5h Hitachi hard disk drive specifications 237 Hitachi hard disk drive specifications 238 Write Multiple Ext Command 39hWrite Multiple Ext 39h Hitachi hard disk drive specifications 239 Write Multiple FUA Ext CEh Hitachi hard disk drive specifications 240Hitachi hard disk drive specifications 241 Hitachi hard disk drive specifications 242 Write Sectors Command 30h/31hWrite Sectors 30h/31h Hitachi hard disk drive specifications 243 Hitachi hard disk drive specifications 244 Write Sectors Ext Command 34hWrite Sectors Ext 34h Hitachi hard disk drive specifications 245 Hitachi hard disk drive specifications 246 Write Stream DMA Command 3AhWrite Stream DMA 3Ah WC bit6 Hitachi hard disk drive specifications 247Bit5 Hitachi hard disk drive specifications 248 Hitachi hard disk drive specifications 249 Write Stream PIO Command 3BhWrite Stream PIO 3Bh Hitachi hard disk drive specifications 250 Hitachi hard disk drive specifications 251 Hitachi hard disk drive specifications 252 Write Uncorrectable Ext Command 45hWrite Uncorrectable Ext 45h Hitachi hard disk drive specifications 253 Hitachi hard disk drive specifications 254 Timeout ValuesHitachi hard disk drive specifications 255 Index 257 258
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HCS721016CLA382, HCS721050CLA382, HCS721025CLA382, HDP725050GLA360, HUA722050CLA330/1 specifications

Hitachi's lineup of hard disk drives, including models such as HDS721075CLA632, HDS721032CLA362, HDS721032CLA662, HDS721050CLA362, and DSDS7210C09EN-04, offers a variety of features catering to different storage needs. These drives are widely recognized for their reliability, performance, and efficiency, making them suitable for both consumer and enterprise applications.

The HDS721075CLA632 model, with a capacity of 750GB, strikes a balance between performance and storage capabilities. It operates at 7200 RPM, ensuring quick access to data while maintaining low latency. Its 32MB cache enhances data transfer rates and improves overall system responsiveness. This HDD is particularly useful for gaming, multimedia, and office applications, allowing users to store a substantial amount of data with quick retrieval times.

The HDS721032CLA362 and HDS721032CLA662 share many similarities and are both designed for budget-conscious consumers. With a capacity of 320GB and a 7200 RPM, they offer efficient storage solutions for everyday tasks. The 32MB cache buffer enables efficient caching of frequently accessed files, providing a smooth experience for users.

Another notable model is the HDS721050CLA362, which features a capacity of 500GB. Like its counterparts, this drive operates at a speed of 7200 RPM and utilizes a 32MB cache, which ensures optimal performance for data-heavy applications. This model stands out for its energy efficiency, resulting in lower operational costs, making it an appealing choice for businesses and energy-conscious consumers alike.

On the other hand, the DSDS7210C09EN-04 is a part of Hitachi's enterprise-oriented offerings. This drive is engineered for demanding applications, featuring advanced technologies such as error recovery controls and enhanced data protection features. With a focus on reliability and performance, the DSDS7210C09EN-04 serves well in server environments and for high-performance computing.

Hitachi's hard drives incorporate various technologies that enhance their performance and durability. Features such as staggered start-up, which gradually powers on the drive, help minimize power surges and increase the longevity of the device. Moreover, Hitachi's commitment to quality ensures that each drive undergoes rigorous testing, guaranteeing functionality and reliability.

Overall, the diverse range of models from Hitachi provides effective solutions for anyone from casual users to enterprises, combining storage capacity with advanced technologies to meet the evolving demands of modern data storage.
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