Data Access Commands | Fujitsu MAP3367, MAP3147, MAS3735, MAP3735

3.2 Data Access Commands

Also, the size of the range where access is permitted, specified in this command in the "Block count" field in the CDB, specifies the number of logical data blocks from that starting point. However, when zero is specified in the "Block count" field, access to the final logical data block of the specified data space (User Space or CE Space), with the logical data block specified in the "Logical block address" field as the starting point, is permitted. Figure 3.12 shows the method for specification of the range where access is permitted in this command.

		n: Value specified in the "Logical block address" field
n–1	n	n+1	n+2	n+3	n+m+1 n+m
		m: Value specified in the "Block count" field

Range where access is permitted by linked commands

Figure 3.12 SET LIMITS command: Specifying the range where access is permitted

If "1" is specified in bit 1 of CDB byte 1, "RdInh (read inhibit)" flag or in bit 0, "WrInh (write inhibit) flag, read operations or write operations is prohibited for linked commands following this command, as shown below.

RdInh	WrInh	Operation limits

0	0	Read/write operations are permitted in the specified range.

0	1	Read operations only are permitted in the specified range.

1	0	Write operations only are permitted in the specified range.

1	1	Both read and write operations are prohibited. Only access by the SEEK
		and SEEK EXTENDED commands is permitted within the specified
		range.

When access to logical data blocks outside the address range defined by this command by linked commands which follow this command is specified, or when a prohibited type of access operation is specified, that command is terminated with a CHECK CONDITION status without being executed. (When there is a violation of the (DATA PROTECT [=7] / Write protect [=27-00]: "WrInh" flag, or when there is a violation of the (DATA PROTECT [=7] / No additional sense information [=00-00]: "RdInh" flag.) When this command is issued again in a group of commands linked in a series, the 2nd SET LIMITS command is rejected and a CHECK CONDITION status (DATA PROTECT [=7] / Command sequence error [=2C-00]) is reported.

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MAP3735, MAP3147, MAS3367, MAP3367, MAS3735 specifications

Fujitsu, a renowned leader in technology and innovation, has developed a variety of reliable hard disk drives (HDDs) that cater to a wide range of data storage needs. Among these, the MAS3735, MAP3367, MAS3367, MAP3147, and MAP3735 series stand out for their advanced features and exceptional performance.

The MAS3735 is a high-capacity enterprise-class drive that boasts a storage capacity of up to 300 GB. Its 10,000 RPM spindle speed ensures rapid data retrieval and efficient performance, making it ideal for data-intensive applications. It utilizes a Serial Attach SCSI (SAS) interface, which allows for improved data transfer rates and increased reliability compared to traditional SATA drives. The drive is designed with advanced technologies such as error recovery and data integrity features, ensuring the safety and security of critical data.

Similarly, the MAP3367 and MAS3367 models are geared towards both enterprise and mid-range server environments, providing a storage capacity of up to 300 GB as well. These drives also operate at a spindle speed of 15,000 RPM, offering swift access times that enhance overall system performance. The MAP3367 employs the Ultra 320 SCSI interface, allowing for significant bandwidth and ensuring data is transmitted efficiently.

On the other hand, both MAP3147 and MAP3735 models provide versatile solutions for various applications, supporting capacities from 36 GB to 147 GB. The MAP3147, with its 10,000 RPM speed, is optimized for workloads requiring quick access and high throughput, making it suitable for transactional systems and enterprise applications. The MAP3735, while offering comparable capacity, emphasizes exceptional reliability and durability, which is crucial for environments that involve heavy data loads.

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In conclusion, Fujitsu's MAS3735, MAP3367, MAS3367, MAP3147, and MAP3735 series HDDs are designed for high performance and reliability, catering to both enterprise and mid-range environments. Their advanced features make them a strong choice for businesses looking to enhance their storage solutions while maintaining data integrity and system performance.

Fujitsu MAP3367, MAP3147, MAS3735, MAP3735, MAS3367 specifications Data Access Commands

Models: MAP3735 MAP3147 MAS3367 MAP3367 MAS3735

3.2 Data Access Commands

Figure 3.12 SET LIMITS command: Specifying the range where access is permitted

MAP3735, MAP3147, MAS3367, MAP3367, MAS3735 specifications