Command Processing

2)The IDD reports a CHECK CONDITION status for a command that generates an overlap. At this time, the sense data generated by the IDD indicates ABORTED COMMAND [=B]/Overlapped commands attempted [=4E-00], or Tagged Overlapped [=4D-nn] (nn: tag No.).

Notes:

1)In order for the INIT to stop processing of a command during a disconnect, it is permitted to send an ABORT TASK message, ABORT TASK SET message, CLEAR TASK SET message or TARGET RESET message with specifying the logical unit (see Section 1.7.6).

2)Specification of overlapping commands applies without dependence upon the type of command that is issued second. For example, even if the command issued second is the INQUIRY or REQUEST SENSE command, the IDD reports the CHECK CONDITION status and terminates both the first command and the second command abnormally.

1.7.2Illegal LUN specification

The logical unit number (LUN) supported by the IDD is LUN = 0 only. If a LUN other than this (1 to 7) is specified, the IDD performs one of the following operations, depending on the type of command issued at that time.

1)The INQUIRY command is executed normally even if the LUN specification is illegal. However, byte 0 of the “Standard INQUIRY Data” (“Qualifier” field and “Device Type Code” field) transferred to the INIT for that command indicates X ‘7F.’

2)The REQUEST SENSE command is executed normally even if the LUN specification is illegal. However, the sense data transferred to the INIT for that command indicates that the LUN specification is illegal (ILLEGAL REQUEST [=5]/Logical unit not supported [=25-00]).

3)If an illegal LUN is specified for a command other than the INQUIRY command or REQUEST SENSE command, that command is terminated abnormally with a CHECK CONDITION status. The sense data generated at this time indicate that the LUN specification is illegal (ILLEGAL REQUEST [=5] /Logical unit not supported [=25-00]).

1.7.3Reserved operation code

Group 7 command operation codes (X ‘E0’ to X ‘FF’) are reserved by Fujitsu. When any command is issued which includes these operation codes, the IDD does not always respond with a CHECK CONDITION status (ILLEGAL REQUEST [=5] / Invalid command operation code [=20-00]. The INIT should not issue commands which contain these operation codes.

1.7.4Command processing in the not ready state

After the IDD’s power is switched on, the initial self-diagnosis is completed normally and the spindle motor reaches the normal rotational speed, “system information,” which includes such information as MODE SELECT parameters and disk media defect information is read from the system space on the disk drive and each type of control information is initialized. When this operation is completed, the IDD is in a state where it can be used (ready state). Furthermore, the not ready state is defined as the IDD being in either of the following states.

• When the spindle motor has not reached the normal rotational speed.

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Fujitsu MAS3735, MAP3367 Illegal LUN specification, Reserved operation code, Command processing in the not ready state
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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.
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