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Fujitsu MAS3735, MAP3367, MAP3147, MAP3735, MAS3367 Persistent Reserve in service actions, Read Keys

Models: MAP3735 MAP3147 MAS3367 MAP3367 MAS3735

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Command Specifications

The PERSISTENT RESERVE IN command obtains information about the reservation requirements and reservation keys that are valid in the target range. This command is used in combination with the PERSISTENT RESERVE OUT command (See Section 3.1.19).

When this command is received, if the reservation in the target is enabled by the RESERVE command, the command is rejected and is returned with the RESERVATION CONFLICT status. If the reservation is enabled by a persistent reservation, this command can be executed normally.

The length of the PERSISTENT RESERVE IN parameter data that can be returned by this command is displayed in the parameter data field. If the specified allocation length in the CDB is not sufficient for containing the entire parameter list, a portion of the parameter list from byte 0 to the specified allocation length is sent. This is not assumed to be an error. If the remaining part of the parameter must be read, the initiator must specify a value that is sufficient for containing the entire list in the Allocation Length field and issue the PERSISTENT RESERVE IN command again.

3.1.18.1PERSISTENT RESERVE IN service actions

In a service action, nonvolatile memory in the logical unit may be required to be in the ready state to access information about reservation requirements or registration (MA*3*** series product requires the drive to be ready). If the nonvolatile memory is not ready, the drive returns the CHECK CONDITION status. The sense key is set to NOT READY [=2]. The sense data is specified with the same value returned by the TEST UNIT READY command.

The service action codes for the PERSISTENT RESERVE IN command are listed below.

Code

Name

Description

 

 

 

00h

READ KEYS

Reads all of the registered reservation keys.

01h

READ RESERVATIONS

Reads all of the persistent reservations that are

 

 

currently enabled.

02h-1Fh

Reserved

 

 

 

 

3.1.18.1.1 READ KEYS

In the READ KEYS service action, the drive transfers the following information to the initiator as a parameter data list.

•Current generation value (See Section 3.1.18.2)

•All of the reservation keys that are currently registered (8 bytes each)

If several initiators register the same key, the key is listed once for each registration. Therefore, the key is displayed on the list as many times as the number of initiators. (The keys are not listed in the order of their registration but in ascending order based on INIT IDs. For example, INIT ID#0 is listed first.) The keys are registered in the REGISTER service action by the PERSISTENT RESERVE OUT command.

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Fujitsu MAS3735, MAP3367, MAP3147, MAP3735, MAS3367 specifications Persistent Reserve in service actions, Read Keys
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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.

All these Fujitsu HDDs are characterized by their robust construction, reliability, and efficiency. They are built to withstand heavy workloads and are equipped with features like advanced thermal management and acoustic noise reduction, ensuring they operate effectively in data center environments.

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.