IBM SCSI Adapters

This bus master adapter has a:

• 16-bit data capability
  
• 32-bit address capability.

The IBM 32-bit SCSI adapter with cache

This is also a bus master adapter, which features:

• 32-bit data capability
  
• 32-bit address capability
  
• 512KB on-board cache.

Up to four adapters may be installed in a PS/2 system at the same time. The two IBM adapters support the following common features:

• The attachment of mixed SCSI device types that support the SCSI Common Command Set (CCS).

• Up to seven physical SCSI devices. Each physical device can support eight logical devices, giving a total of 56 devices per adapter (SCSI bus).

• Overlapped command processing for up to 15 devices.

• A data transfer rate of up to 5MB per second from the adapter to a device on the SCSI bus.

• A data transfer rate of up to 16.6MB per second from the adapter to the system (8.3MB per second for the 16-bit version).

  SCSI devices can be attached to the IBM SCSI adapters both internally and externally. The adapters have two interface connectors. A connector on the top edge of the card allows the attachment of devices mounted internally in the system unit. There is a second connector on the end of the card, to which the external connection cable attaches.

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