DellPowerEdge R610 Technical Guide 39Figure 8. Dell 2.5” Hard Drive Carrier12.2.2 Empty Drive BaysFor the slots that are not occupied by drives, a carrier blank is provided to maintain proper cooling,maintain a uniform appearance to the unit, and provide EMI shielding.12.2.3 Diskless Configuration SupportThe system supports diskless configuration with no storage controller (SAS 6/iR, PERC 6i, PERC H200,or PERC H700) installed in the system. A 2.5‖ hard drive backplane is still installed in thisconfiguration.12.2.4 Hard Drive LED IndicatorsEach disk drive carrier has two LED indicators visible from the front of the system. One is a green LEDfor disk activity and the other is a bicolor (green/amber) LED for status information. The activity LEDis driven by the disk drive during normal operation. The bicolor LED is controlled by the storageenclosure processor (SEP) device on the backplane. Both LEDs are used to indicate certain conditionsunder direction of a storage controller.For more information, see the Hard-Drive Indicator Patterns section in the About Your Systemchapter in the Dell PowerEdge R610 Systems Hardware Owner’s Manual on Support.Dell.com.12.3 RAID ConfigurationsSee Table 11 for information on factory RAID configurations. For information on additionalconfigurations, visit Dell.com.Table 11. Factory RAID ConfigurationsNon-Mixed DrivesAll SATA, all SAS, orall SSDAll 2.5” DrivesConfigType Configs Description Min HDD Max HDDNo HDD 0 NZC No controller/No hard drive 0 0SAS orSATA—NoRAID1 MSS Integrated SAS/SATA (SAS 6/iR,PERC H200), No RAID 1 6