HOST SOFTWARE INTERFACE

Command Register

Contains code for the command to be performed. Additional command information should be written to the task file before the Command register is loaded. When this register is written, the BUSY bit in the Status register sets, and interrupt request to the host clears; invalid commands abort. (Detailed information on interface commands is given in Section 7.) Hex values for valid command formats follow:

Read Commands

Read

Sector(s)

20h

Normal reads; retries enabled

 

 

21h

Normal reads; retries disabled

 

 

22h

Read Long; retries enabled

 

 

23h

Read Long; retries disabled

Read

Verify Sector(s)

40h

Retries enabled

 

 

41h

Retries disabled

Read Sector Buffer

E4h

 

Read Multiple

C4h

 

Read DMA

C8h

 

 

 

C9h

No retries

Write Commands

Write

Sector(s)

30h

Normal writes; retries enabled

 

 

31h

Normal writes; retries disabled

 

 

32h

Write Long; retries enabled

 

 

33h

Write Long; retries disabled

Write

Verify Sector(s)

3Ch

 

Write Sector Buffer

E8h

 

Write Multiple

C5h

 

Write DMA

CAh

 

 

 

CBh

No retries

Mode Set/Check Commands

Set

Features

EFh

Set Multiple Mode

C6h

Power Mode Commands

Standby Immediate

94/E0h Stops drive spindle; do not change time-out value

Idle Immediate

95/E1h Starts spindle; do not change time-out value

Standby

96/E2h Stops spindle; change time-out value

Idle

97/E3h Starts spindle; change time-out value

Check Power Mode

98/E5h

Set Sleep Mode

99/E6h

Initialization Commands

Identify

Drive

ECh

Initialize

Drive Parameters

91h

Re-calibrate

1xh

Seek, Format, and Diagnostic Commands

Seek

 

7xh

Format

Track

50h

Execute

Drive Diagnostic

90h

S.M.A.R.T. Commands

Execute S.M.A.R.T.

B0h

6 – 3

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Image 45
Maxtor 91366U4, 91024U3, 90683U2, 92049U6, 91707U5, 92732U8 manual Command Register

91024U3, 92049U6, 90683U2, 91707U5, 92732U8 specifications

The Maxtor series of hard drives, specifically the models 91366U4, 92732U8, 91707U5, 90683U2, and 92049U6, exemplify the evolution of storage technology during the late 1990s and early 2000s, pivotal in shaping contemporary data storage solutions. These hard drives are recognized for their reliability, performance, and impressive capacities for their time.

The Maxtor 91366U4 features a storage capacity of 13.6 GB, delivering a spindle speed of 5,400 RPM. Its UATA interface allows for a fast data transfer rate, which was notable in its category. The model incorporates Advanced Power Management, contributing to lower power consumption and reduced heat generation, making it an appealing choice for system builders looking to enhance system longevity.

Moving on to the Maxtor 92732U8, this model increased capacity to 27.3 GB, aligning with the growing demand for more storage from users and businesses alike. This drive maintained a 5,400 RPM spindle speed while improving the access times, which aided in speeding up file retrieval processes. Noteworthy is its Plug and Play capability, which simplified installation and compatibility across various systems.

The Maxtor 91707U5 brought forward advancements in data integrity with the inclusion of features such as error correction codes. With a storage size of 17.3 GB and similar operational speeds, this model catered to users seeking reliable data management. Its robust build aimed to protect against accidents and environmental factors, ensuring data was safe while providing consistent performance.

The Maxtor 90683U2, with its 68.3 GB capacity, is particularly recognized for its reliability in desktop applications. The drive integrates a combination of Unidirectional Technology, driving advancements in read/write capabilities, and extensive shock protection, making it an ideal candidate for users with intensive data processing requirements.

Lastly, the Maxtor 92049U6 is known for its balanced blend of performance and functionality. Holding a capacity of 49.1 GB and retaining the sophisticated features of its predecessors, this model enabled faster data access and storage capabilities that met the needs of both home and professional users.

Together, these Maxtor hard drives embody the technological strides in the evolution of data storage—offering capacities and performances that set a standard in the industry and laid the groundwork for future storage solutions. The combination of innovative technologies and practical features made these drives highly sought after during their respective periods, and their legacy continues to influence modern data storage products.