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Dell PowerVault ME4 Series Storage System Deployment Guide

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5U enclosure LEDs

Use the LEDs on the 5U enclosure to help troubleshoot initial start-up problems.

NOTE:When the 5U84 enclosure is powered on, all LEDs are lit for a short period to ensure that they are working. This behavior does not indicate a fault unless LEDs remain lit after several seconds.

5U PSU LEDs

The following table describes the LED states for the PSU:

Table 1. PSU LED states
CRU Fail (Amber) AC Missing (Amber) Power (Green) Status
On Off Off No AC power to either PSU
On On Off PSU present, but not supplying power or PSU alert state. (typically due to critical temperature)
Off Off On Mains AC present, switch on. This PSU is providing power.
Off Off Blinking AC power present, PSU in standby (other PSU is providing power).
Blinking Blinking Off PSU firmware download in progress
Off On Off AC power missing, PSU in standby (other PSU is providing power).
On On On Firmware has lost communication with the PSU module.
On -- Off PSU has failed. Follow the procedure in “Replacing a PSU” in the Dell PowerVault ME4 Series Storage System Owner’s Manual.

5U FCM LEDs

The following table describes the LEDs on the Fan Cooling Module (FCM) faceplate:

Table 2. FCM LED descriptions
LED Status/description
Module OK Constant green indicates that the FCM is working correctly. Off indicates that the fan module has failed. Follow the procedure in “Replacing an FCM” in the Dell PowerVault ME4 Series Storage System Owner’s Manual.
Fan Fault Amber indicates that the fan module has failed. Follow the procedure in “Replacing an FCM” in the Dell PowerVault ME4 Series Storage System Owner’s Manual.

5U Ops panel LEDs

The Ops panel displays the aggregated status of all the modules.

Table 3. Ops panel LED descriptions
LED Status/description
Unit ID display Usually shows the ID number for the enclosure, but can be used for other purposes, for example, blinking to locate enclosure.
Power On/Standby Amber if the system is in standby. Green if the system has full power.
Module Fault Amber indicates a fault in a controller module, IOM, PSU, or FCM. Check the drawer LEDs for indication of a disk fault.
Logical status Amber indicates a fault from something other than firmware (usually a disk, an HBA, or an internal or external RAID controller). Check the drawer LEDs for indication of a disk fault.
Drawer 0 Fault Amber indicates a disk, cable, or sideplane fault in drawer 0. Open the drawer and check DDICs for faults.
Drawer 1 Fault Amber indicates a disk, cable, or sideplane fault in drawer 1. Open the drawer and check DDICs for faults.

5U drawer LEDs

The following table describes the LEDs on the drawers:

Table 4. Drawer LED descriptions
LED Status/description
Sideplane OK/Power Good Green if the sideplane card is working and there are no power problems.
Drawer Fault Amber if a drawer component has failed. If the failed component is a disk, the LED on the failed DDIC lights amber. Follow the procedure in “Replacing a DDIC” in the Dell PowerVault ME4 Series Storage System Owner’s Manual. If the disks are OK, contact your service provider to identify the cause of the failure, and resolve the problem.
Logical Fault Amber (solid) indicates a disk fault. Amber (blinking) indicates that one or more storage systems are in an impacted state.
Cable Fault Amber indicates the cabling between the drawer and the back of the enclosure has failed. Contact your service provider to resolve the problem.
Activity Bar Graph Displays the amount of data I/O from zero segments lit (no I/O) to all six segments lit (maximum I/O).

5U DDIC LED

The DDIC supports LFF 3.5 in. and SFF 2.5 in. disks. The following figure shows the top panel of the DDIC as viewed when the disk is aligned for insertion into a drawer slot.

Figure 1. LEDs: DDIC – 5U enclosure disk slot in drawer
DDIC LEDs – 5U enclosure disk slot in drawer
  1. Slide latch (slides left)
  2. Latch button (shown in the locked position)
  3. Drive Fault LED
Table 5. DDIC LED descriptions
Fault LED (Amber) Status/description*
Off Off (disk module/enclosure)
Off Not present
Blinking: 1 s on/1 s off Identify
Any links down: On Drive link (PHY lane) down
On Fault (leftover/failed/locked-out)
Off Available
Off Storage system: Initializing
Off Storage system: Fault-tolerant
Off Storage system: Degraded (non-critical)
Blinking: 3 s on/1 s off Storage system: Degraded (critical)
Off Storage system: Quarantined
Blinking: 3 s on/1 s off Storage system: Offline (dequarantined)
Off Storage system: Reconstruction
Off Processing I/O (whether from host or internal activity)

*If multiple conditions occur simultaneously, the LED state behaves as indicated in the previous table.

Each DDIC has a single Drive Fault LED. If the Drive Fault LED is lit amber, a disk fault is indicated. If a disk failure occurs, follow the procedure in “Replacing a DDIC” in the Dell PowerVault ME4 Series Storage System Owner’s Manual.

5U controller module or IOM LEDs

5U temperature sensors

Temperature sensors throughout the enclosure and its components monitor the thermal health of the storage system. Exceeding the limits of critical values causes a notification to occur.

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