Chapter 1. General description 3The Models 6C1 and 6E1 are the first IBM UNIX servers that contain built-in Light PathDiagnostics. This technology provides LEDs physically located on key system components,assisting in quick diagnosis and resolution of problems, should they arise. Please refer to“Light Path diagnostics” on page 21 to get detailed information.1.2 Physical packageFigure 1-1 on page 3 shows the package layout for the Model 6C1, and Figure 1-2 on page 4shows the same for the Model 6E1.Figure 1-1 pSeries 610 Model 6C1 - package layoutThe Model 6C1 is a 5U (EIA) 1 19 inch rack-mounted system and has a size of 426 mm W x617 mm D x 215 mm H (16.8 inches W x 24.0 inches D x 8.5 inches). The Model 6E1 has atower package. Its size is 215 mm W x 617 mm D x 426 mm H (8.5 inches W x 24.0 inches Dx 16.8 inches H). Both systems have a maximum weight of 43.1 kg (94.8 pounds).The system comes preconfigured with the features the customer ordered, leaving one mediabay available for customer expansion. Any devices in the media bays are connected to theinternal Ultra3 SCSI controller (depending on the configuration selected, additional cablesmay be required to complete an order, see 2.4.4, “Internal storage attachments” on page 15for more information).To connect external SCSI devices to the external Ultra3 SCSI adapter’s VHDCI 2 , orderfeature code # 2118 (mini-68 pin VHDCI to 68 pin). This 0.3 m long cable (P/N 76H0518) isnot included with the minimum system configuration.1 One EIA (Electronic Industries Association Unit) is 44.45 mm (1.75”).2 Very High Density Cable Interconnect (VHDCI)