This chapter outlines several issues that you need to consider before you install the Desktop SunCD Plus Pack (DSPP), including power and grounding, length of your cables, and the SCSI bus length.
DSPPs use nominal input voltages of 100 - 120 VAC or 200 - 240 VAC. Sun products are designed to work with single-phase power systems having a grounded neutral conductor. To reduce the risk of electrical shock, do not plug Sun products into any other type of power system. Contact your facilities manager or a qualified electrician if you are not sure what type of power is supplied to your building.
When planning equipment placement, remember that each of the following items requires access (by way of a separate power cord) to a power outlet:
Data cables supplied with Sun equipment are of sufficient length to meet the needs of most installations. If the cables packed with your equipment are too short for your particular installation, ask your Sun sales representative about the availability of alternate-length cables.
Some of the cables supplied with your Sun equipment must be of specific lengths to conform with engineering and safety standards. Replacing those cables may be hazardous and may degrade the performance of your equipment.
Your desktop system performs reliably with a maximum SCSI bus length of 20 feet (6 meters). The internal signal path of your system unit and the external SCSI cables must not exceed this maximum length. If this length is exceeded, the system will not run in a reliable manner.
To determine if the total SCSI bus length of the configuration you want to use
with your desktop system is 6 meters or less, refer to Appendix B, "Small
Computer Systems Interface Information" for the internal SCSI bus lengths of
specific SPARC
For example, suppose you wish to connect a DSPP and a Desktop Storage
Module to a SPARCstation
Since this total is well below the maximum of 6 meters, this configuration is acceptable.
