Owners Manual

Table 11. DC PSU status indicator codes (continued)
Power indicator codes Condition
CAUTION: When correcting a PSU mismatch, replace only the PSU with the
blinking indicator. Swapping the PSU to make a matched pair can result in an
error condition and unexpected system shutdown. To change from a High Output
configuration to a Low Output configuration or vice versa, you must turn off the
system.
CAUTION: If two PSUs are used, they must be of the same type and have the same
maximum output power.
CAUTION: Combining AC and DC PSUs is not supported and triggers a mismatch.
Hard drive indicator codes
Each hard drive carrier has an activity LED indicator and a status LED indicator. The indicators provide information about the
current status of the hard drive. The activity LED indicator indicates whether the hard drive is currently in use or not. The status
LED indicator indicates the power condition of the drive.
Figure 11. Hard drive indicators
1. hard drive activity LED indicator
2. hard drive status LED indicator
3. hard drive
NOTE:
If the hard drive is in the Advanced Host Controller Interface (AHCI) mode, the status LED indicator does not turn
on.
NOTE: Drive status indicator behavior is managed by Storage Spaces Direct. Not all drive status indicators may be used.
Table 12. Hard drive indicator codes
Hard drive status indicator code Condition
Flashes 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 are
initialized after the system is turned on. Drives are not ready
for removal during this time.
Flashes green, amber, and then turns off Predicted drive failure.
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