HP Visualize J5000 hp Visualize J5000, J7000 workstations owner's guide (a4476 - Page 197

SCSI Bus Differences A Small Computer Systems Interface (SCSI) bus is an IEEE standard bus for connecting your workstation to internal and external devices (SCSI devices) running at different speeds, singly or in combination. Examples of these SCSI devices are floppy disk drives, 4-mm DDSformat tape drives, CD-ROM drives, and Winchester hard disk drives. There are two types of SCSI buses available with this workstation - a single-ended SCSI bus, and a fast, wide SCSI bus. Table C-1 shows the specification differences between these SCSI buses, and Table C-2 shows the SCSI addresses, ID numbers, and arbitration priorities for each. CAUTION: Do not mix single-ended and fast, wide devices on any one bus type. Doing this will cause a system failure. Table C-1. SCSI Bus Differences Transfer Rate Data Bus Width Maximum Addresses* Maximum Cable Length Single-Ended up to 5 Mbytes per second 8 bits 8 6.0 meters (19.6 feet) Fast, Wide up to 20 Mbytes per second 16 bits 16 25 meters (82 feet) * Address 7 is reserved for host controller use on both buses. Device Physical Location internal and external internal and external Controller Embedded or Plugable embedded embedded C-3