6.2Disk Media Initialization

6.2.1Initialization during installation

The disk drive is initialized for the inherent (default) data format for each respective model name (model class) when it is shipped from the factory, so ordinarily, it is not necessary to initialized (format) the disk media when it is installed in a system. However, in cases where data attributes which differ from the default format are necessary, initialization (formatting) of the entire disk media by the following procedures is necessary. At this time, the INIT can change the following data format attributes.

ξThe logical data block length.

ξThe number of logical data blocks or the number of cylinders in the User Space.

ξThe size of the spare area for alternate blocks.

(1)Issuing the MODE SELECT command

The MODE SELECT or MODE SELECT EXTENDED command is issued and the format attributes on the disk media are specified. The necessary parameters at this time are as follows.

a.Block descriptor

The logical data block size (byte length) is specified in the "Data block length" field. Also, when desiring to clearly specify the logical data block count, specify that value in the "Data block count" field. If not, zero may be specified in the "Data block count" field. In that case, the number of logical data blocks after initialization will be determined by the values specified in the Format parameters (Page 3) and the Drive parameters (Page 4).

b.Format parameters (Page 3)

Specify the number of spare sectors secured in each cylinder in the "Alternate sector count/zone" field. It is desirable not to specify a value that is lower than the IDD's default value in this field.

c.Drive parameters (Page 4)

When desiring to clearly specify the number of cylinders in the "User Space," specify that value in the "Cylinder count" field. In this case, it is necessary to note that the number of cylinders in the User Space includes the number of alternate cylinders specified in the Format parameters (Page 3). When it is not particularly necessary to specify the number of cylinders, zero, or a value equal to the default value, may be specified in the "Cylinder count" field. In this case, the number of cylinders necessary to secure the number of logical data blocks specified in the "Data block count" field in the block descriptor, or the maximum number of cylinders that can be used as User Space on the disk drive, whichever is smaller, will be allocated to user space. Furthermore, if zero is specified in both the "Cylinder count" field and the "Data block count" field in the block descriptor, the maximum number of cylinders on the disk drive that can be used as User Space will be allocated to User Space.

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Fujitsu MAN3184, MAN3367, MAN3735 SERIES DISK DRIVES Disk Media Initialization Initialization during installation

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.

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