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Hitachi HDS723020BLA642 manual Write Buffer E8h, Write Buffer Command E8h

Models: HDS723020BLA642

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7K200 SATA OEM Specification

14.42Write Buffer (E8h)

Command Block Output Registers																																							Command Block Input Registers
Register								7			6					5				4				3				2				1				0			Register							7			6					5			4			3	2		1				0
Data							-			-					-					-			-					-			-					-			Data							-			-				-			-			-		-		-				-
Feature							-			-					-					-			-					-			-					-			Error												...See Below...
Sector Count								-			-					-				-				-				-				-				-			Sector Count							-			-					-			-			-	-		-				-
LBA Low								-			-					-				-				-				-				-				-			LBA Low							-			-					-			-			-	-		-				-
LBA Mid								-			-					-				-				-				-				-				-			LBA Mid							-			-					-			-			-	-		-				-
LBA High								-			-					-				-				-				-				-				-			LBA High							-			-					-			-			-	-		-				-
Device								-			-					-				-				-				-				-				-			Device							-			-					-			-			-	-		-				-
Command							1			1					1					0			1					0			0					0			Status													...See Below...

				Error Register																																							Status Register
7		6	5	4		3							2								1									0									7		6	5		4	3						2								1				0
CRC		UNC	0	IDN		0							ABT								T0N											AM							BSY		RDY	DF		DSC	DRQ						COR									IDX			ERR
																																N
0		0	0	0		0										V					0									0									0		V	0		-	-						0								0				V

Table 126 Write Buffer Command (E8h)

The Write Buffer command transfers a sector of data from the host to the sector buffer of the device. The sectors of data are transferred through the Data Register 16 bits at a time.

The Read Buffer and Write Buffer commands are synchronized such that sequential Write Buffer and Read Buffer commands access the same 512 byte within the buffer.

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Hitachi HDS723020BLA642 manual Write Buffer E8h, Write Buffer Command E8h

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.

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 Abbreviations 11 /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 Cylinder allocation Data sheetData sheet Cylinder allocation Performance characteristics Performance characteristicsCommand overhead Full stroke seek Mechanical positioningAverage seek time including settling Average latency Drive ready time Drive ready time Adaptive power save control Mode transition timeOperating mode at power on Operating mode Data integrity Data loss on power offWrite safety Write Cache Automatic reallocation Error recoveryData buffer test ECC Environment SpecificationTemperature and humidity Corrosion test Magnetic fields Radiation noiseConductive noise Magnetic flux density limits DC power requirements Requirements Power consumption efficiency Power consumption efficiency Data reliability Service life and usage conditionReliability Failure prediction S.M.A.R.T Power switch design considerations Preventive maintenanceRequired Power-Off Sequence Load/unload Test considerations Physical dimensions and weight Mechanical specificationsPhysical dimensions and weight Mounting hole locations Load/unload mechanism Connector and jumper descriptionMounting orientation Random vibration Vibration and shockOperating vibration Swept sine vibration Nonoperating shock Nonoperating vibrationOperating shock Acoustics Sound power levelWeighted sound power Discrete tone penalty Identification labels Electromagnetic compatibility Substance restriction requirements SafetyPackaging Cabling Electrical interface specificationsInterface connector 1 TX+ / TX Signal definitionsInterface connector pins and I/O signals 2 RX+ / RX Out of band signaling COMRESET/COMINIT Comwake Part 2 Interface Specification Terminology GeneralIntroduction Interrupt request Device or Host Physical Interface Check Power ModeDeviations from Standard Registers Register naming convention Register naming convention and correspondence Device Control Register Command registerError Register Device Register LBA Low Register Features RegisterLBA High Register LBA Mid Register Status Register BSY Soft Reset Software Reset Reset ResponsePower On Reset POR General Operation Descriptions Diagnostic Codes Diagnostic and Reset considerationsDefault Register Values Reset error register values Device’s behavior by ATA commands Power-off considerationsRequired power-off sequence Emergency unload Logical CHS Addressing Mode Sector Addressing ModePower Management Feature LBA Addressing Mode Standby/Sleep command completion timing Power ModePower Management Commands Interface Capability for Power Modes Active Idle mode Initial Power Mode at Power OnPerformance Idle mode Low Power Idle mode Transition Time Interface Power Management Mode Slumber and Partial12.8 S.M.A.R.T. Function Attributes Security Mode Feature Set Security Level PasswordMaster Password Revision Code Operation example Operation from POR after User Password is set Initial Setting User Password Lost Usual Operation Command Table Attempt limit for Security Unlock command Command table for device lock operation Protected Area Function Read Native Max Address ‘F8’h Set Max Address ‘F9’h Example for operation In LBA mode Shipping HDDs from HDD manufacturer Set Max security extension commands Set Max Set Password data content Reassign Function Seek OverlapWrite Cache Function Non recovered read errors 12.14 48-bit Address Feature SetNon recovered write errors Recovered read errors Software Setting Preservation Feature Set Preserved software settings Native Command Queuing Setting SCT Action Code Supported Command ProtocolSmart Command Transport SCT Data In Commands Data Out Commands Non-Data Commands DMA Data Transfer Commands First-parity DMA Commands Read Fpdma Queued Write Fpdma Queued Command Descriptions Command set Command Set Command Set Subcommand Output Registers Input Registers Input Parameters From The Device Check Power Mode E5h/98hCheck Power Mode Command E5h/98h Device Configuration Freeze Lock subcommand C1h Device Configuration Overlay B1hDevice Configuration Restore subcommand C0h Device Configuration Overlay Command B1h Device Configuration Identify subcommand C2h Device Configuration SET subcommand C3h Device Configuration Overlay Data structure DCO error information definition Execute Device Diagnostic 90h Execute Device Diagnostic Command 90h Flush Cache Command E7h Flush Cache E7h Flush Cache EXT Command EAh Flush Cache Ext EAh Output Parameters To The Device LBA Low Format Track Command 50hFormat Track 50h Vendor Specific LBA High/Mid Format Unit Command F7h Format Unit F7h Vendor Specific Identify Device Command ECh Identify Device ECh Identify 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 91h Read Buffer Command E4h Read Buffer E4h Read DMA Command C8h/C9h Read DMAC8h/C9h Read DMA Ext Command 25h Read DMA Ext 25h Feature Previous Read Fpdma Queued Command 60hOutput Parameters To The Device Feature Current Read Fpdma Queued 60h Log address definition Read Log Ext Command 2FhRead Log Ext2Fh Output Parameters To The Device Extended comprehensive Smart error log General purpose Log Directory Extended Error log data structure Error Log versionError log index Extended comprehensive Smart error Log Command data structure Error data structure Self-test log data structure revision number Device error countExtended Self-test log sector Extended Self-test log data structure Self-test descriptor index Command ErrorCommand Error information Extended Self-test log descriptor entry Counter Identifiers Counter Reset MechanismsPhy Event Counter Read Log Ext Log Page 11h Phy Event Counter information Read Multiple Command C4h Read Multiple C4h Read Multiple Ext 29h Output Parameters To The Device Sector Count Current Read Native Max Address Command F8h Read Native Max Address F8h Read Native Max Address Ext Command 29h Read Native Max Address Ext 27h Read Sectors Command 20h/21h Read Sectors 20h/21h Read Sectors Ext Command 24h Read Sectors Ext 24h Read Verify Sectors Command 40h/41h Read Verify Sectors 40h/41h Read Verify Sectors Ext Command 42h Read Verify Sectors Ext 42h Recalibrate Command 1xh Recalibrate 1xh Password Information for Security Disable Password command Security Disable Password F6hSecurity Disable Password Command F6h Security Erase Prepare Command F3h Security Erase Prepare F3h Erase Unit Information Security Erase Unit Command F4hSecurity Erase Unit F4h Identifier 126/173 Security Freeze Lock Command F5h Security Freeze Lock F5h Security Set Password Information Security Set Password F1hSecurity Set Password Command F1h Revision Code PasswordSecurity Level Identifier=User / Security level = High Security Unlock Information Security Unlock Command F2hSecurity Unlock F2h Seek Command 7xh Seek 7xh Sense Condition F0h vendor specific Sense Condition Command F0hOutput Parameters To The Device Feature Input Parameters From The Device Sector Count Set Features EFh Set Features Command EFh 134/173 Set Max Address Command F9h Set Max Address F9h 04h Input Parameters From The Device LBA Low Input 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 C6h Sleep Command E6h/99h Sleep E6h/99h M.A.R.T. Function Set Command B0h 14.39.1 S.M.A.R.T. Sub commands14.39.1.1S.M.A.R.T. Read Attribute Values Subcommand D0h 14.39 S.M.A.R.T Function Set B0h 14.39.1.4S.M.A.R.T. Save Attribute Values Subcommand D3h LBA Mid ErrorStatus LBA High 14.39.1.8S.M.A.R.T. Enable Operations Subcommand D8h 14.39.1.6S.M.A.R.T. Read Log Sector Subcommand D5h14.39.1.7S.M.A.R.T. Write Log Sector Subcommand D6h Log sector addresses 14.39.1.9S.M.A.R.T. Disable Operations Subcommand D9h 14.39.1.10 S.M.A.R.T. Return Status Subcommand DAh Device Attribute Data Structure Device Attributes Data StructureData Structure Revision Number Individual Attribute Data Structure Individual Attribute Data Structure Status Flag Definitions Off-Line Data Collection StatusSelf-test execution status Off-Line Data Collection Capability 14.39.2.9 Error Logging CapabilityCurrent Segment Pointer 14.39.2.8 S.M.A.R.T. Capability Self-test completion time Device Attribute Thresholds Data StructureSelf-test failure check point Data Structure Checksum Attribute ID Numbers 14.39.5 S.M.A.R.T. error log sector14.39.4 S.M.A.R.T. Log Directory Attribute Threshold M.A.R.T. error log sector 14.39.5.1 S.M.A.R.T. error log versionError log pointer Error log data structure X2h Value State X0hX1h X3h Self-test log data structure Self-test log data structure Selective self-test log data structure Error ReportingM.A.R.T. Error Codes Selective self-test log data structure Standby Command E2h/96h Standby E2h/96h Standby Immediate Command E0h/94h Standby Immediate E0h/94h Write Buffer Command E8h Write Buffer E8h Write DMA Command CAh/CBh Write DMA CAh/CBh Write DMA Ext Command 35h Write DMA Ext 35h Write DMA FUA Ext Command 3Dh Write DMA FUA Ext 3Dh Write Fpdma Queued Command 61h Write Fpdma Queued 61h Write Log Ext Command Write Log Ext 3Fh Write Multiple C5h Write Multiple Ext Command 39h Write Multiple Ext 39h Write Multiple FUA Ext Command CEh Write Multiple FUA Ext CEh Write Sectors Command 30h/31h Write Sectors 30h/31h Write Sectors Ext Command 34h Write Sectors Ext 34h Write Uncorrectable Ext Command 45h Write Uncorrectable Ext 45h 170/173 Timeout Values Timings Erase Unit F4h on 172/173 Copyright Hitachi Global Storage Technologies