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)
The IDD has
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 drives max. (option for NP model) | |
• | 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.
• | The data transfer rate on the SCSI bus is 40 MB/s maximum at the | |
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| synchronous mode. |
• | The data transfer rate on the SCSI bus is 320 MB/s maximum at the paced | |
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| transfer synchronous mode. |