Chapter 3. IBM System Storage DS4000 and DS5000 hardware 79
3.5.5 DS5020 storage subsystem LED indicator lights
LED indicator lights allow the DS5020 to communicate with the user. There are four main
components with LEDs:
Front panel
RAID controllers
Battery
Power supply fans
Front panel LEDs and FC link speed selector
Figure 3-57 shows the DS5020 front panel and its LED indicator lights.
Figure 3-57 DS5020 front panel LEDS
Link speed selector
The FC link speed selector is a physical switch that must be used to set the enclosure speed.
The DS5020 Express storage system drive channel operates at only at 4 Gbps Fibre Channel
interface speed.
Front LEDs
These are:
Locate LED (blue)
– On: This indicates storage subsystem locate.
– Off: This is the normal status.
Service action required LED (amber)
– On: There is a corresponding needs attention condition flagged by the controller
firmware. Some of these conditions might not be hardware related.
– Off: This is the normal status.
Note: The DS5020 storage system SATA E-DDM CRUs have an ATA translator card that
converts E-DDM 3 Gbps SATA drive interface protocol to 4 Gbps Fibre Channel interface
speed.
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