Selective self-test log data structure | Hitachi HDS723020BLA642

7K200 SATA OEM Specification

14.39.7Selective self-test log data structure

The Selective self-test log is a log that may be both written and read by the host. This log allows the host to select the parameters for the self-test and to monitor the progress of the self-test. The following table defines the contents of the Selective self-test log which is 512 bytes long. All multi-byte fields shown in these data structures follow the specifications for byte ordering.

Description	Bytes	Offset	Read/Write
Data structure revision	2	00h	R/W
Starting LBA for test span 1	8	02h	R/W
Ending LBA for test span 1	8	0Ah	R/W
Starting LBA for test span 2	8	12A	R/W
Ending LBA for test span 2	8	1Ah	R/W
Starting LBA for test span 3	8	22h	R/W
Ending LBA for test span 3	8	2Ah	R/W
Starting LBA for test span 4	8	32h	R/W
Ending LBA for test span 4	8	3Ah	R/W
Starting LBA for test span 5	8	42h	R/W
Ending LBA for test span 5	8	4Ah	R/W
Reserved	256	52h	Reserved
Vendor specific	154	152h	Vendor specific
Current LBA under test	8	1ECh	Read
Current span under test	2	1F4h	Read
Feature flags	2	1F6	R/W
Vendor specific	4	1F8h	Vendor specific
Selective self test pending time	2	1FCh	R/W
Reserved	1	1FEh	Reserved
Data structure checksum	1	1FFh	R/W
	512

Table 122 Selective self-test log data structure

14.39.8Error Reporting

The following table shows the values returned in the Status and Error Registers when specific error conditions are encountered by a device.

Error Condition	Status Register	Error Register
A S.M.A.R.T. FUNCTION SET command was received	51h	04h
by the device without the required key being loaded into
the LBA High and LBA Mid registers.
A S.M.A.R.T. FUNCTION SET command was received	51h	04h
by the device with a subcommand value in the Features
Register that is either invalid or not supported by this
device.
A S.M.A.R.T. FUNCTION SET command subcommand	51h	04h
other than S.M.A.R.T. ENABLE OPERATIONS was
received by the device while the device was in a
“S.M.A.R.T. disabled” state.
The device is unable to read its Attribute Values or	51h	10h or 40h
Attribute Thresholds data structure.
The device is unable to write to its Attribute Values data	51h	10h or 01h
structure.

Table 123 S.M.A.R.T. Error Codes

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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.

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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.

Hitachi HDS723020BLA642 manual Selective self-test log data structure, Error Reporting

Models: HDS723020BLA642