Led Indicators; Optical Drives - Dell External OEMR R910 Technical Manual

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13.7 LED Indicators

Each hard drive carrier has two LED indicators visible from the front of the system. One is a green
LED for disk activity and the other is a bicolor (Green/Amber) LED for status information. The
activity LED is driven by the disk drive during normal operation. The bicolor LED is controlled by the
SEP device on the backplane. Both LEDs are used to indicate certain conditions under direction of a
storage controller. See Hard Drive Indicator Patterns in the Hardware Owner's Manual for more
information.

13.8 Optical Drives

SATA optical drives are optional in all R910 systems and connect to the planar via the SATA interface
to ICH10. IDE (PATA) optical drives are not supported.
The following internal optical drives are available on R910: DVD-ROM and DVD+RW.
If the optical drive is not ordered with the system, a blank is installed in its place.
Dell PowerEdge R910 Technical Guide 54