Filter
Top Products
86 Chapter4
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 a 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.
CAUTION It is necessary to put a terminator on unused SCSI connectors on the
back panel of the system. 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 4-1). Before
adding another SCSI device, determine if the system can support the
additional device.
This workstation offers the following types of SCSI buses, each with
their 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
Narrow Single-Ended or the Ultra2 Wide Low-Voltage Differential SCSI