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Fujitsu MHC2040AT, MHC2032AT, MHD2021AT, MHD2032AT manual Address Translation, Default parameters

Models: MHC2040AT MHC2032AT MHD2032AT MHD2021AT

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6.2 Address Translation

6.2 Address 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.

6.2.1 Default 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 sa the default translation mode. The parameters in Table 6.1 are called BIOS specification.

Table 6.1 Default parameters

 

 

MHC2032AT

MHC2040AT

MHD2021AT

MHD2032AT

 

 

 

 

 

 

 

Number of cylinders

6,304

7,944

4,200

6,304

Parameters

 

 

 

 

 

Number of heads

16

16

16

16

(logical)

 

 

 

 

 

Number of sectors/track

63

63

63

63

 

 

 

 

 

 

 

Formatted capacity (MB)

3,253.4

4,099.8

2167.6

3253.4

 

 

 

 

 

 

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).

C141-E050-02EN

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Fujitsu MHC2040AT, MHC2032AT, MHD2021AT, MHD2032AT manual Address Translation, Default parameters
Page 185 Page 187

MHC2040AT, MHC2032AT, MHD2032AT, MHD2021AT specifications

Fujitsu offers a range of advanced hard disk drives (HDD) designed for various computing needs, including the MHD2021AT, MHD2032AT, MHC2032AT, and MHC2040AT models. These drives combine reliable performance, capacity options, and technological features aimed at enhancing data storage efficiency.

The Fujitsu MHD2021AT is known for its capacity of 20 GB, making it an excellent choice for users requiring a compact and efficient HDD. With a spindle speed of 5400 RPM, it balances speed and power consumption, catering to mobile computing and lower power devices. Its ATA interface ensures compatibility with a wide range of systems, making it a versatile option for various applications.

The MHD2032AT model offers a slightly higher capacity of 30 GB, maintaining similar technological attributes to its predecessor. With an enhanced data transfer rate, it allows for quicker access to stored files, perfect for users handling larger volumes of data. The robust error correction features in this model further ensure data integrity, making it a reliable choice for demanding environments.

For users needing more robust storage solutions, the MHC2032AT steps it up with features tailored for performance-heavy applications. Its 30 GB capacity is suited for desktop and workstation environments that require swift data retrieval and significant storage. The drive employs advanced caching techniques, which boost performance further by optimizing read and write operations, ensuring smoother multitasking capabilities.

The MHC2040AT is the flagship model in this line, providing an impressive storage capacity of 40 GB. This HDD is designed for high-performance applications where speed is crucial. The drive’s increased spindle speed and superior data transfer rates make it ideal for video editing, gaming, and large database management. Alongside its enhanced performance features, it includes advanced thermal management technology that maintains optimal operational temperatures, prolonging the drive's lifespan.

All four models leverage Fujitsu's commitment to data reliability, featuring robust shock resistance and low noise levels. Collectively, these drives cater to a spectrum of user needs, from compact data storage to high-capacity solutions, maintaining Fujitsu's reputation for quality and innovation in the storage market.