Table 30. AC PSU status indicator codes
Power indicator codes Condition
and an unexpected system shutdown. To change from a high output configuration to a
low output configuration or vice versa, you must power off the system.
CAUTION: AC PSUs support both 240 V and 120 V input voltages with the exception of
Titanium PSUs, which support only 240 V. When two identical PSUs receive different
input voltages, they can output different wattages, and trigger a mismatch.
Drive indicator codes
The LEDs on the drive carrier indicates the state of each drive. Each drive carrier has two LEDs: an activity LED (green) and a
status LED (bicolor, green/amber). The activity LED blinks whenever the drive is accessed.
Figure 137. Drive indicators on the drive and the mid drive tray backplane
1. Drive activity LED indicator
2. Drive status LED indicator
3. Drive capacity label
NOTE: If the drive is in the Advanced Host Controller Interface (AHCI) mode, the status LED indicator does not power on.
NOTE: Drive status indicator behavior is managed by Storage Spaces Direct. Not all drive status indicators may be used.
Table 31. Drive indicator codes
Drive status indicator code Condition
Blinks green twice per second Indicates that the drive is being identified or preparing for removal.
Off Indicates that the drive is ready for removal.
NOTE: The drive status indicator remains off until all drives are
initialized after the system is powered on. Drives are not ready
for removal during this time.
Blinks green, amber, and then powers off Indicates that there is an expected drive failure.
Blinks amber four times per second Indicates that the drive has failed.
Blinks green slowly Indicates that the drive is rebuilding.
Solid green Indicates that the drive is online.
Blinks green for three seconds, amber for three seconds,
and then powers off after six seconds
Indicates that the rebuild has stopped.
134 System diagnostics and indicator codes