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Dell Express Flash NVMe PCIe SSD User’s Guide

NVMe PCIe SSD carrier LED indicators

The LEDs on the NVMe PCIe SSD U.2 carrier indicate the state of each physical device. Each NVMe PCIe SSD carrier in your enclosure has an activity LED (green) and a status LED (bicolor, green/amber). The activity LED flashes whenever the device is accessed.
Figure 1. NVMe PCIe SSD device carrier LED indicators
This figure shows the NVMe PCIe SSD LED indicators and release button locations
  1. status indicator
  2. activity indicator
  3. release button
While the operating system is running, the status indicator provides the current status of the device. The following table lists the device states along with the associated LED indicator codes.
Table 1. NVMe PCIe SSD U.2 states and LED indicator codesNVMe PCIe SSD U.2 States and LED Indicator Codes
State Name Slot/Device State Status LED (Green) Status LED (Amber)
Device status off The server or device is not powered up. Off Off
Device online The device is powered up. On Off
Device identify (blink) The device is identifying the slot location or is indicating the device has received a Prepare for Removal command from the host operating system. Not applicable Off
Device failed The host operating system no longer has access to the device because the device is not responding or has encountered a critical error condition. Off On for 250 msec. Off for 250 msec.
Read only The device will only service read operations. Off Not applicable
Predicted failure The SMART feature set has predicted a degradation or fault condition. On for 250 msec. Off for 250 msec. Not applicable

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