HP Visualize J5000 hp Visualize J5000, J7000 workstations owner's guide (a4978 - Page 128

CAUTION SCSI Connections SCSI Restrictions Terminators The terminators for Ultra2 Wide Low-Voltage Differential SCSI (LVD SCSI) and Ultra Narrow Single-Ended SCSI (NSE SCSI) are different. The NSE SCSI terminator has 50 pins and will fit on an NSE SCSI connector. The LVD SCSI terminator has 68 pins and will fit on a LVD SCSI connector. Note that these SCSI terminators were shipped with your system. It is necessary to put a terminator on unused SCSI connectors on the back panel of the system; these terminators are shipped with your computer. However, if SCSI devices are attached to the bus via these connectors, the external device connected to the SCSI bus must be terminated with a SCSI terminator. If you do not already have the SCSI terminators, you must order terminator A1658-63012 (for the 50-pin terminator; NSE SCSI) or A4986-63008 (for the 68-pin terminator; LVD SCSI) from Hewlett-Packard. Number of Devices Per SCSI Bus The number of SCSI devices per bus is limited (see Table 7-1). Before adding another SCSI device, determine if the system can support the additional device. This workstation offers the following types of SCSI bus, each with its own configuration constraints: • Ultra Narrow Single-Ended SCSI bus • Ultra2 Wide Low-Voltage Differential SCSI bus Considerations for Selecting SCSI Devices SCSI devices supported by the Hewlett-Packard Company for the Ultra Narrow Single-Ended (NSE) and Ultra2 Wide Low-Voltage Differential (LVD) SCSI buses have been qualified as SCSI devices which meet NSE and LVD specifications. Contact your local HP sales representative for a current list of SCSI devices supported by HP for use on the Ultra Narrow Single-Ended and Ultra2 Wide Low-Voltage Differential SCSI buses. If devices other than those supported by HP are connected to the Ultra 128 Chapter 7