5.The saved value of the MODE SELECT parameter is assumed as the initial value of each parameter after the power-on, the RESET condition, or the BUS DEVICE RESET message. The INIT can change the parameter value temporary (actively) at any timing by issuing the MODE SELECT or MODE SELECT EXTENDED command with specifying "0" to the SP bit in the CDB.

(1)Error recovery parameter

The following parameters are used to control operations such as IDD internal error recovery:

a. Read/write error recovery parameters (page code = 1)

 

 

Parameter

 

Default value

 

• AWRE:

Automatic alternate block allocation at Write

 

1 (enabled)

 

 

operation

 

 

 

• ARRE:

Automatic alternate block allocation at read

 

1 (enabled)

 

 

operation

 

 

 

• TB:

Uncorrectable data transfer to the INIT

 

1 (enabled)

 

• EER:

Immediate correction of correctable error

 

1 (enabled)

 

• PER:

Report of recovered error

 

0 (disabled)

 

• DCR:

Suppression of ECC error correction

 

0 (Correction is

 

 

 

 

enabled.)

 

• Retry count at read operation

63

 

• Retry count at write operation

63

 

• Recovery time limit

 

30 sec

b. Verify error recovery parameters (page code = 7)

 

 

 

 

Parameter

 

Default value

 

 

 

 

 

 

• ERR:

Immediate correction of recoverable error

 

1 (enabled)

 

• PER:

Report of recovered error

 

0 (disabled)

 

• DTE:

Stop of command processing at successful

 

0 (Processing is

 

 

error recovery

 

continued.)

 

• DCR:

Suppression of ECC error correction

 

0 (Correction is

 

 

 

 

enabled.)

 

• Retry count at verification

63

c. Additional error recovery parameters (page code = 21)

 

 

 

 

Parameter

 

Default value

 

 

 

 

 

• Retry count at seek error

15

C141-E166

5-19

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Fujitsu MAP3147NC/NP, MAP3735NC/NP, MAP3367NC/NP manual Awre, Arre

MAP3735NC/NP, MAP3367NC/NP, MAP3147NC/NP specifications

Fujitsu's MAP3147NC/NP, MAP3367NC/NP, and MAP3735NC/NP hard disk drives represent a robust solution for businesses seeking reliable data storage options. These models are part of Fujitsu’s extensive line of high-performance hard drives that cater to various organizational needs, from servers to high-capacity data storage systems.

One of the standout features of these hard drives is their speed. The MAP3147NC/NP operates at a spindle speed of 10,000 RPM, ensuring rapid data access and retrieval. This speed is essential for environments requiring quick data transactions, making it suitable for enterprise-level databases and high-performance computing applications.

The capacity range across these models is designed to meet varying storage requirements. The MAP3147NC offers 147 GB, while the MAP3367NC provides 67 GB, and the MAP3735NC boasts a generous capacity of 35 GB. This diversity allows organizations to select the drive that best fits their data storage and performance needs while maintaining a scalable storage solution.

In terms of technology, the drives incorporate advanced features such as Serial Attached SCSI (SAS) interface, which enhances data throughput and reliability compared to traditional Parallel SCSI interfaces. SAS technology enables these drives to support multiple device connections while ensuring high-performance throughput, essential for modern enterprise environments.

The drives employ a 64 MB cache, providing a significant performance boost by allowing for quicker access to frequently used data. This capability improves overall system responsiveness, especially in applications requiring high input/output operations per second (IOPS).

Moreover, the MAP3147NC/NP, MAP3367NC/NP, and MAP3735NC/NP series are designed with data integrity in mind. They include features such as Error Correction Code (ECC) and background error scanning, which work together to maintain the integrity of stored data and minimize the risk of data loss.

In conclusion, Fujitsu’s MAP3147NC/NP, MAP3367NC/NP, and MAP3735NC/NP hard disk drives provide a blend of performance, capacity, and reliability. With their fast spindle speeds, robust data throughput via SAS technology, and enhanced cache memory, these drives are ideal for enterprises requiring durable and efficient data storage solutions in high-demand environments. As organization needs evolve, these drives offer scalability and reliability to support diverse applications and workloads.