Dell™ PowerEdge™ R710 Technical Guidebook41e. 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 LED isdriven by the disk drive during normal operation. The bicolor LED is controlled by the SEP device on thebackplane. Both LEDs are used to indicate certain conditions under direction of a storage controller.f. Optical DrivesOptical drives are optional in all of the PowerEdge R710 systems and connect to the planar via the SATAinterface. The following internal slim-line drives are available on the PowerEdge R710: DVD-ROM andDVD+RW. PATA (IDE) optical drives are not supported.If an optical drive is not ordered with the system, a blank is installed in its place.G. tape DrivesInternal tape drives are optional in systems with the 4x3.5" or 8x2.5" backplanes. Internal SATA tapedrives connect directly to the SATA connector on the planar. Internal SCSI tape drives connect throughthe LSI 2032 PCI Express SCSI adapter card.taPe DRivesInternal Tape Internal (RD1000 Half-Height SATA)DAT72 Half –Height SCSIInternal TapeDrive Bays One 3.5" Half-Height Tape Drive BayExternal TBUExternal (RD1000 USB)LTO-2L (Legacy, SCSI)LTO-3-060 (SCSI)LTO-3 (Legacy, SCSI)LTO-4-120 (Half-Height SAS)LTO-4-120 (Full-Height SAS)2U external TBU (PV114T)DAT72 Half–Height SCSIExternalTBU/Automation4U SAS, SCSI, iSCSI, and FC2U SAS, SCSI, iSCSI, and FCML6000 Family SAS, SCSI, and FC2U external TBU (PV124T ) Legacy SCSI