Data Domain: Alert - IO module has failed | ENVIRONMENT-00029

Summary: When an I/O Module (aka SLIC or PCI card) fails or is removed from a Data Domain (DD), the system generates the EventID: ENVIRONMENT-00029: Event Message: I/O module has failed.

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Symptoms

The failure or removal of an I/O card (e.g SAS, NIC, NVRAM, FC) results in loss of communication to the affected card. 
Hot-Swap of PCIe devices is NOT supported.

Note: Hot-swap triggers an unexpected reboot of the system.

Alert Example:

Alert Id:       147
Event Id:       EVT-ENVIRONMENT-00029
Event Message:  I/O module has failed
Object:         Enclosure=1:Slot=7
Additional Information: Cause=A hardware fault occurred

This KB applies to PCIe devices; the same alert can also be generated against a Trusted Platform Module (TPM)

Cause

The failure or removal of a system module (I/O card)

Resolution

Check and confirm the status of the affected card:

  • DDCLI (SSH) # system show hardware
    • A failed or removed card slot reported as '(empty)' 
    • Example:
      sysadmin@DD# sys show hardware
Slot   Vendor   Device                            Ports
----   ------   -------------------------------   --------------
M      QLogic   QL41000 4x 10GBase-T (NDC)        Ma, Mb, Mc, Md
1      QLogic   QL41164 4x 10GbE SFP+             1a, 1b, 1c, 1d
2      EMC      NVRAM 16GB Card
3      EMC      PMC Quad Port 12 Gbps SAS         3a, 3b, 3c, 3d
4      Intel    Intel QuickAssist Adapter 8970
5      EMC      Quad Port 16 Gbps Fibre Channel   5a, 5b, 5c, 5d
6      QLogic   QL41000 2x 25GbE                  6a, 6b
7      (empty)         (empty)
8      QLogic   QL41000 2x 25GbE                  8a, 8b
----   ------   -------------------------------   --------------

       

      • This example show slot 7 as (empty) as the card in that slot had failed.
    • This output can be compared to Auto-Support to determine the missing card if all slots are not populated.

If the card was removed accidentally:

  • Power off the DD unit, DDCLI (SSH):  
    • # system poweroff
  • Reinstall the card as needed
  • Power the system back on.

If the card is suspected to be faulty or failed, contact your Support Provider to investigate and arrange a repair or replacement.

Affected Products

Data Domain, Data Domain Deduplication Storage Systems, Integrated Data Protection Appliance Family, PowerProtect Data Protection Hardware
Article Properties
Article Number: 000203868
Article Type: Solution
Last Modified: 29 Sep 2025
Version:  4
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