Sun Microsystems, Inc.   Sun System Handbook - ISO 3.4 June 2011 Internal/Partner Edition
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Small Computer System Interface (SCSI) Overview

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Fast-160 SCSI / Ultra-320 SCSI / SPI-4

  • Wide 16-Bit Data Bus
  • Low Voltage Differential (LVD)
  • Backwards compatible with Single Ended (SE)
  • Synchronous Transfer Rate up to 320Mbytes/sec

Fast-80 SCSI / Ultra-3 SCSI / Ultra-160 SCSI / SPI-3

  • Wide 16-Bit Data Bus
  • Low Voltage Differential (LVD)
  • Backwards compatible with Single Ended (SE)
  • Synchronous Transfer Rate up to 160Mbytes/sec

Fast-40 SCSI / Ultra-2 SCSI / SPI-2

  • Narrow 8-Bit or Wide 16-Bit Data Bus
  • Low Voltage Differential (LVD)
  • Backwards compatible with Single Ended (SE)
  • Asynchronous Transfer Rate up to 40Mbytes/sec
  • Synchronous Transfer Rate up to 80Mbytes/sec

Fast-20 SCSI / Ultra SCSI

  • Narrow 8-Bit or Wide 16-Bit Data Bus
  • Single Ended (SE) or High Voltage Differential (HVD)
  • Asynchronous Transfer Rate up to 20Mbytes/sec
  • Synchronous Transfer Rate up to 40Mbytes/sec

Fast and Wide SCSI / SCSI-3 / SCSI-3 SPI

  • Narrow 8-Bit or Wide 16-Bit Data Bus
  • Single Ended (SE) or High Voltage Differential (HVD)
  • Asynchronous Transfer Rate up to 10Mbytes/sec
  • Synchronous Transfer Rate up to 20Mbytes/sec

Fast SCSI / SCSI-2

  • Narrow 8-Bit Data Bus
  • Single Ended (SE) or High Voltage Differential (HVD)
  • Asynchronous Transfer Rate up to 5Mbytes/sec
  • Synchronous Transfer Rate up to 10Mbytes/sec

SCSI-1

  • Narrow 8-Bit Data Bus
  • Single Ended (SE) or High Voltage Differential (HVD)
  • Asynchronous Transfer Rate up to 2.5Mbytes/sec
  • Synchronous Transfer Rate up to 5Mbytes/sec


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