Dell EMC PowerEdge R640 WNW58 Installation And Service Manual

Table 15. DC PSU status indicator codes (continued)Power indicator codes Conditionhave the same power rating. This results in a PSU mismatch condition or failure toturn the system on.CAUTION: When correcting a PSU mismatch, replace only the PSU with theblinking indicator. Swapping the PSU to make a matched pair can result in anerror condition and unexpected system shutdown. To change from a High Outputconfiguration to a Low Output configuration or vice versa, you must turn off thesystem.CAUTION: If two PSUs are used, they must be of the same type and have the samemaximum output power.CAUTION: Combining AC and DC PSUs is not supported and triggers a mismatch.Drive indicator codesEach drive carrier has an activity LED indicator and a status LED indicator. The indicators provide information about the currentstatus of the drive. The activity LED indicator indicates whether the drive is currently in use or not. The status LED indicatorindicates the power condition of the drive.Figure 12. Drive indicators on the drive and the mid drive tray backplane1. Drive activity LED indicator2. Drive status LED indicator3. Drive capacity labelNOTE: If the drive is in the Advanced Host Controller Interface (AHCI) mode, the status LED indicator does not turn on.Table 16. Drive indicator codesDrive status indicator code ConditionFlashes green twice per second Identifying drive or preparing for removal.Off Drive ready for removal.NOTE: The drive status indicator remains off until all drives areinitialized after the system is turned on. Drives are not readyfor removal during this time.Flashes green, amber, and then turns off Predicted drive failure.Flashes amber four times per second Drive failed.Flashes green slowly Drive rebuilding.Dell EMC PowerEdge R640 overview 23