Read Multiple X’C4’ | Fujitsu MHW2040AC, MHW2060AC guide

5.3 Host Commands

(18) READ MULTIPLE (X’C4’)

The READ MULTIPLE Command performs the same as the READ SECTOR(S) Command except that when the device is ready to transfer data for a block of sectors, and enters the interrupt pending state only before the data transfer for the first sector of the block sectors. In the READ MULTIPLE command operation, the DRQ bit of the Status register is set only at the start of the data block, and is not set on each sector.

The number of sectors per block is defined by a successful SET MULTIPLE MODE Command. The SET MULTIPLE MODE command should be executed prior to the READ MULTIPLE command.

If the number of requested sectors is not divided evenly (having the same number of sectors [block count]), as many full blocks as possible are transferred, then a final partial block is transferred. The number of sectors in the partial block to be transferred is n where n = remainder of (“number of sectors”/”block count”).

If the READ MULTIPLE command is issued before the SET MULTIPLE MODE command is executed or when the READ MULTIPLE command is disabled, the device rejects the READ MULTIPLE command with an ABORTED COMMAND error.

Figure 5.2 shows an example of the execution of the READ MULTIPLE command.

•Block count specified by SET MULTIPLE MODE command = 4 (number of sectors in a block)

•READ MULTIPLE command specifies;

Number of requested sectors = 9 (Sector Count register = 9)

Figure 5.2 Execution example of READ MULTIPLE command

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MHW2060AC, MHW2040AC specifications

The Fujitsu MHW2040AC and MHW2060AC are notable hard disk drives (HDDs) that have been widely used in various computing applications, especially in laptops and compact devices. These models are part of Fujitsu's commitment to providing reliable storage solutions that meet the demands of modern computing.

The MHW2040AC offers a storage capacity of 40 GB, while the MHW2060AC provides a slightly larger capacity at 60 GB. This range of storage makes both models suitable for users looking for dependable space for documents, multimedia files, and software applications. Both drives utilize a 2.5-inch form factor, ideal for mobile computing, as they are lightweight and designed to fit into space-constrained environments.

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In summary, the Fujitsu MHW2040AC and MHW2060AC are reliable, efficient, and user-friendly hard disk drives that combine moderate capacities with advanced features designed to enhance performance, ensure data integrity, and extend device longevity. These drives are well-suited for a range of applications, making them a solid choice for users seeking dependable storage solutions.

Fujitsu MHW2040AC, MHW2060AC manual Read Multiple X’C4’, Execution example of Read Multiple command

Models: MHW2060AC MHW2040AC