6.2Address Translation

When the IDD receives any command which involves access to the disk medium, the IDD always implements the address translation from the logical address (a host-specified address) to the physical address (logical to physical address translation).

Following subsections explains the CHS translation mode.

6.2.1Default parameters

In the logical to physical address translation, the logical cylinder, head, and sector addresses are translated to the physical cylinder, head, and sector addresses based on the number of heads and the number of sectors per track which are specified with an INITIALIZE DEVICE PARAMETERS command. This is called as the current translation mode.

If the number of heads and the number of sectors are not specified with an INITIALIZE DEVICE PARAMETERS command, the default values listed in Table 6.1 are used. This is called as the default translation mode. The parameters in Table 6.1 are called BIOS specification.

Table 6.1 Default parameters

 

 

MPE3064AT

MPE3102AT

MPE3136AT

 

MPE3170AT

MPE3204AT

MPE3273AT

 

 

 

 

 

 

 

 

 

 

Number of

13,410

 

 

16,383

 

 

 

cylinders

 

 

 

 

 

 

 

 

 

 

 

 

Parameters

 

 

 

 

 

 

 

 

Number of

15

 

 

16

 

 

(logical)

head

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Number of

 

 

 

63

 

 

 

sectors/track

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Formatted capacity (MB)

6,488.3

10,248.4

13,664.6

 

17,080.6

20,496.7

27,329.2

 

 

 

 

 

 

 

 

 

As long as the formatted capacity of the IDD does not exceed the value shown on Table 6.1, the host can freely specify the number of cylinders, heads, and sectors per track.

Generally, the device recognizes the number of heads and sectors per track with the INITIALIZE DEVICE PARAMETER command. However, it cannot recognizes the number of cylinders. In other words, there is no way for the device to recognize a host access area on logical cylinders. Thus the host should manage cylinder access to the device.

The host can specify a logical address freely within an area where an address can be specified (within the specified number of cylinders, heads, and sectors per track) in the current translation mode.

The host can read an addressable parameter information from the device by the IDENTIFY DEVICE command (Words 54 to 56).

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Fujitsu MPE3XXXAT manual Default parameters, MPE3170AT MPE3204AT MPE3273AT
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MPE3XXXAT specifications

The Fujitsu MPE3XXXAT series is a robust line of hard disk drives (HDDs) known for their reliability, performance, and advanced technology. Designed primarily for enterprise storage solutions, these drives cater to high-demand environments such as data centers, servers, and workstations. With capacities ranging from hundreds of gigabytes to several terabytes, the MPE3XXXAT series offers scalable storage options to accommodate a variety of applications.

One of the standout features of the MPE3XXXAT series is its high rotational speed. With most models operating at 7200 RPM, these drives ensure faster data access and improved read/write performance. This speed makes them ideal for applications requiring quick data retrieval, such as database management and data-intensive workloads. Furthermore, the series utilizes a Serial ATA (SATA) interface, which facilitates seamless connectivity and compatibility with a wide range of systems.

The Fujitsu MPE3XXXAT series is built with advanced technologies that enhance durability and longevity. Notably, the drives incorporate advanced error correction algorithms and vibration resistance features, which are crucial for maintaining data integrity over time. This is particularly important in multi-drive environments where vibrations from one drive can affect the performance of others. The drives are also designed with low power consumption in mind, contributing to energy savings without compromising performance.

In terms of data security, the MPE3XXXAT series supports various security features that protect against unauthorized access. These include ATA security features that enable password protection and robust encryption to safeguard sensitive information from potential breaches. This aspect is particularly significant for enterprises that handle confidential data and require stringent security measures.

The operational temperature range of the MPE3XXXAT drives is optimized for demanding environments, allowing them to function effectively in a variety of conditions. Their reliability is backed by an impressive Mean Time Between Failures (MTBF), which signifies their resilience and the manufacturer's commitment to quality.

Overall, the Fujitsu MPE3XXXAT series stands out as a reliable choice for enterprise storage needs. With its blend of high speed, capacity, durability, and security features, it addresses the challenges faced by modern data centers and businesses that require efficient data management solutions. Whether for backup, archival, or active data storage, the MPE3XXXAT series is designed to deliver consistent performance and peace of mind for users.
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