Fujitsu MAN3184, MAN3367, MAN3735 SERIES DISK DRIVES specifications

Models: MAN3735 MAN3184, MAN3367, MAN3735 SERIES DISK DRIVES MAN3367 MAN3184

1 302
Download 302 pages 19.12 Kb
Page 214
Image 214

a.Parameters for specifying alternate processing areas for defective blocks (bytes 2 to 9)

The following 4 parameters specify the position and number of spare sectors for performing defective block alternate allocation processing on the disk media. See Chapter 3, "Data Format" of Product Manual for details of the IDD's alternate block processing.

ξTrack count/zone

This parameter specifies the number of tracks a unit for alternating blocks. The INIT cannot clearly specify this value. The IDD ignores the specification for this bit. If the value of the Active Notch in Page C is 0, the “Number of Logic Heads a cell” is reported for the MODE SENSE and MODE SENSE EXTENDED commands.

If not, the total number of track of the zone which is specified as the Active Notch is reported.

ξAlternate sector count/zone

This parameter specifies the number of sectors per one cell as the number of spare sectors secured for use as alternate blocks. In the IDD, this parameter indicates the number of spare sectors secured in each cell. The maximum permissible value of this parameter either the "number of physical sectors per track in the last cell - 1" or "24", whichever is smaller. It is possible for the INIT to vary this parameter within a range of 0 to the maximum permissible value. When a value which exceeds the maximum permissible value is specified, the IDD performs rounding down of the parameter and sets a value equal to this parameter's maximum permissible value. If the above rounding processing is performed, a CHECK CONDITION status (RECOVERED ERROR [= 1] / Rounded parameter [37-00] is reported for that command.

ξAlternate track count / zone

This parameter specifies the area secured for alternate blocks as the number of tracks per one cell. It is impossible to change this parameter. When a value other than zero is specified in this field, the IDD performs rounding down processing of this parameter and always sets this parameter value at zero.

ξAlternate track count / drive

This parameter specifies the area secured for alternate blocks as the number of tracks per disk drive. In the IDD, this parameter indicates the number of tracks in the spare area secured as alternate cells. This value is fixed at a value that equals the number of tracks per cylinder multiplied by the number of zones in the IDD. This parameter cannot be changed by the INIT.

b. Parameters specifying track format (bytes 10, 11)

ξSector count/track

This parameter specifies the number of physical sectors per 1 track. In the IDD, the number of physical sectors in a track is set unilaterally according to the data format specified by the "Data Block Length" parameter in the block descriptor or the "Data byte length/Physical sector" parameter in this page descriptor, so this parameter cannot be changed. The IDD disregards the value specified in this field. This parameter indicates the value of zone specified in Active Notch of Page C. If it is 0, this parameter indicates the value in zone 0.

4 - 16

C141-E124-01EN

Page 214
Image 214
Fujitsu MAN3184, MAN3367, MAN3735 SERIES DISK DRIVES specifications

MAN3735, MAN3184, MAN3367, MAN3735 SERIES DISK DRIVES, MAN3367, MAN3184 specifications

Fujitsu's MAN3184, MAN3367, and MAN3735 series disk drives represent a significant advancement in storage technology, catering to the needs of businesses seeking reliability, performance, and high capacity. These drives are designed for enterprise environments, providing exceptional data integrity and speed essential for effective data management.

The MAN3184 series is renowned for its high rotational speed of 10,000 RPM, which significantly enhances data access times. With a capacity of up to 18.4 GB, these drives are suitable for applications requiring quick read and write operations. The series employs an improved read/write head technology, which reduces latency and increases overall performance. This technology is complemented by advanced error correction mechanisms, ensuring the reliability necessary for critical data applications.

Transitioning to the MAN3367 series, these drives offer increased storage capacity and improved performance metrics. With capacities reaching up to 36.7 GB, they cater to growing data demands in modern enterprises. They also feature a 10,000 RPM spindle speed, ensuring that the drives can handle intensive workloads with ease. The MAN3367 drives include SCSI interface support, making them versatile and easy to integrate into various systems. The inclusion of intelligent caching algorithms allows for faster data retrieval, while built-in thermal management features ensure optimal performance, even under heavy usage.

The MAN3735 series takes performance up another notch, boasting higher capacities of up to 73.5 GB. These drives are particularly suited for environments that require high reliability and availability. The series utilizes a state-of-the-art SCSI Ultra160 interface, which maximizes data transfer rates, ultimately enhancing overall system efficiency. Additionally, the MAN3735 series employs advanced data protection technologies, including power loss protection and predictive failure analysis, which proactively minimizes potential downtime.

All these series of Fujitsu disk drives are built with a focus on durability and sustained performance. They are designed to operate seamlessly in high-demand environments, ensuring that organizations can rely on them for critical applications. Their compact design and energy-efficient operation make them an ideal choice for modern data centers looking to optimize space and reduce power consumption.

In summary, Fujitsu's MAN3184, MAN3367, and MAN3735 series disk drives deliver a blend of high capacity, performance, and reliability. These drives incorporate advanced technologies that address the evolving needs of enterprise storage solutions, making them a valuable asset for any organization aiming to enhance their data management capabilities.