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Maxtor D540X-4K manual Sector4+564

Models: D540X-4K

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ATA Bus Interface and ATA Commands

 

 

READ DEFECT LIST LENGTH Command Bytes

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

6CDNG￿￿￿￿￿￿

Code

Length in8#￿#HVGTSectors.7'￿

Sector4')+56'4

0 ￿8#$GHQTG.7'￿

Defect&'(+0+6+10List Subcode

Count

 

 

(LSB)

Sector

FFh

Password

Length in Sectors

Number

 

 

(MSB)

Cylinder

FFh

Password

FFh

Low

 

 

 

 

Cylinder

3Fh

Password

3Fh

High

 

 

 

 

Device/

AXh (Drive 0)

Drive Select

AXh = Drive 0

Head

 

 

 

BXh (Drive 1)

—

BXh = Drive 1

 

 

 

 

 

 

Command

F0h

Extended Command

Status Register

 

 

 

 

 

Registers 1F2h through 1F5h must contain the exact values 0QVG￿shown. These values function as a key. The drive issues the

message ILLEGAL COMMAND if the bytes are not entered correctly.

The READ DEFECT LIST command is an extended AT command that enables the host to retrieve the drive’s defect list. The host begins by writing to address 1F6h to select the drive. Then the host writes to addresses 1F2h – 1F5h using values indicated in Table 6-4.When the host subsequently writes the extended command code F0h to address 1F7h, the drive sets BSY, retrieves the defect list, sets DRQ, and resets BSY. The host can now read the requested number of sectors (512 bytes) of data. An INTRQ precedes each sector. Bytes 1F2h and 1F3h contain the 2-byte number of sectors that the host expects to read, with address 1F2h containing the LSB (see Table 6-4). The sector count (1F2h – 1F3h) may vary from product to product and if the wrong value is supplied for a specific product, the drive responds by setting the ABRT bit in the Error register. If the host does not know the appropriate sector count for a specific product, it can issue the Read Defect List Length command, described in the previous section to set up the task file for the Read Defect List command.

Maxtor D540X-4K 20.4/40.0/60.0/80.0 GB AT

6-9

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Page 71
Image 71
Maxtor D540X-4K manual Sector4+564
Page 70 Page 72

D540X-4K specifications

The Maxtor D540X-4K is a notable hard disk drive that has made its mark in the world of computer storage solutions. Launched in the early 2000s, this drive was known for its high capacity and reliable performance, making it a popular choice among consumers and businesses alike.

One of the main features of the D540X-4K is its generous storage capacity. With a range of models available, users could select from configurations starting at 40GB to larger sizes, accommodating a wide variety of storage needs. This capacity was particularly advantageous during an era when digital media was rapidly expanding, allowing users to store everything from documents and photos to videos and applications without running out of space.

The D540X-4K utilizes an IDE (Integrated Drive Electronics) interface, also known as PATA (Parallel ATA), which ensures compatibility with a broad spectrum of computers. This interface was standard at the time, making the drive accessible to a wide user base. The drive also supports ATA-100, providing data transfer rates of up to 100 MB/s, which was impressive for its time.

In terms of performance, the drive operates at a speed of 5400 RPM, which, while not the fastest in comparison to modern solid-state drives, provided a suitable balance of speed and efficiency for the average user’s needs. This rotational speed ensured decent read and write times for everyday applications, making it a reliable option for personal computing.

Another characteristic of the D540X-4K is its advanced data protection features. The drive was equipped with Maxtor's unique Shock Protection Technology, which helps protect the drive’s internal components from damage due to shocks or drops. This feature contributed to increased reliability, especially for users in mobile or high-traffic environments.

The Maxtor D540X-4K also incorporates a Cache Buffer, which enhances performance by temporarily storing frequently accessed data. The cache sizes varied across models, with options of 2MB or more, aiding in quicker data retrieval and overall improved system responsiveness.

In summary, the Maxtor D540X-4K is a hard drive that stands out for its storage capacity, compatibility, and protective features. Even today, it serves as a reminder of the evolution of data storage technologies, as it laid the groundwork for the high-capacity drives we utilize in modern computing. Its legacy continues to influence new technologies while reflecting the needs of the early digital era.