1.1Standard Features

(1)Compactness

Since the SCSI controller circuit is embedded in the standard 3.5 type fixed disk drive form factor, the IDD is extremely compact. The IDD can be connected directly to the SCSI bus of the host system.

(2)SCSI standard

The IDD provides not only SCSI basic functions but also the following features:

Arbitration

Disconnection/Reconnection

Data bus parity

The SCSI commands can manipulate data through logical block addressing regardless of the physical characteristics of the disk drive. This allows software to accommodate future expansion of system functions.

(3)8-bit SCSI/16-bit SCSI

The IDD has 16-bit data bus width (16-bit SCSI), which have the wide transfer function suitable for SCSI-2. 8-bit data bus is available only with NP model.

See subsection 5.3.2 for details of the bus width setting.

For the ultra SCSI model, number of connectable SCSI devices on the same SCSI bus is varied as follows.

8-bit SCSI:

8 drives max. (option for NP model)

16-bit SCSI:

16 drives max.

(4)High speed data transfer

Such a high data transfer rate on the SCSI bus can be useful with the large capacity buffer in the IDD.

8-bit SCSI:

The data transfer rate on the SCSI bus is 40 MB/s maximum at the

 

 

synchronous mode.

16-bit SCSI:

The data transfer rate on the SCSI bus is 320 MB/s maximum at the paced

 

 

transfer synchronous mode.

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Fujitsu MAU3073NC/NP, MAU3147NC/NP, MAU3036NC/NP manual Standard Features

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