3.1 Control/Sense Commands

The "Additional Length" field contains a count of the number of bytes to follow in the "Reservation Descriptors" field. If the specified allocation length in the CDB of the PERSISTENT RESERVE IN command is not sufficient for containing the entire parameter list, a portion of the parameter list from byte 0 to the specified allocation length is transferred to the initiator. If the remaining data of the list may be truncated, valid reservation descriptors are created in the "Additional Length" field.

1. The format of the PERSISTENT RESERVE IN reservation descriptors is shown below.

 

Bit

7

6

 

5

 

4

3

 

2

 

1

0

Byte

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

0

(8)

(MSB)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Reservation Key

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

7 (15)

 

 

 

 

 

 

 

 

 

 

 

(LSB)

 

 

 

 

 

 

 

 

 

 

 

 

 

8 (16)

(MSB)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Scope-specific Address

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

11

(19)

 

 

 

 

 

 

 

 

 

 

 

(LSB)

 

 

 

 

 

 

 

 

 

 

 

 

12

(20)

 

 

 

 

 

X'00' (Reserved)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

13

(21)

 

 

Scope

 

 

 

 

 

Type

 

 

 

 

 

 

 

 

 

 

 

 

 

14-15

 

 

 

 

 

X'00' (Reserved)

 

 

 

 

(22-23)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

The reservation requirements kept by a logical unit are displayed with the Reservation Descriptors in the parameter data. The Descriptors include reservation keys of the initiator that holds the reservation requirements. The Descriptors also include the "Type" value and the "Scope" value of the reservation requirements specified by the PERSISTENT RESERVE OUT command (See Sections 3.1.18.3.1 and 3.1.18.3.2).

The reservation key indicates a key registered according to the reservation requirements. If each initiator uses a unique key, the application must associate the initiator that holds the reservation requirements with the reservation key.

If "Scope" is the Element reservation, the "Scope-specific Address" field indicates an element address, where zeros are filled in the upper bytes. If the "Scope" is a logical unit reservation, the "Scope-specific Address" field shall be set to zero.

Note: MA*3*** series product does not support the Element reservation.

3.1.18.3.1 Persistent reservation scope

The value in the "Scope" field indicates that either a persistent reservation applies to an entire logical unit, or it applies part of the logical unit (element). "Scope" field values are defined below.

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Fujitsu MAP3367, MAP3147, MAS3735, MAP3735, MAS3367 specifications Persistent reservation scope
Page 114 Page 116

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.

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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.
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