Data Domain: Unsupported Hardware Spare Size | STORAGE-00005

Summary: A disk with insufficient capacity has been inserted into a Data Domain system and cannot be used as a spare. The system requires spare disks to be equal to or larger than the failed disk to maintain RAID integrity. ...

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Instructions

Affected Systems:

  • All Data Domain models
  • All DDOS versions

Symptoms:

  • Error Code: STORAGE-00005
  • Error Message: UnsupportedHardwareSpareSize
  • System reports:
    • "Disk may not be used as a spare, size must be larger."
    • "The disk capacity is too small for it to be used as a SPARE in the system."

Cause:

The inserted replacement disk has a smaller capacity than required. RAID configurations demand that spare disks match or exceed the size of the failed disk to ensure rebuild compatibility and data integrity.

Common scenarios include:

  • Incorrect disk supplied during maintenance or replacement.
  • Mismatched disk capacity due to inventory or ordering error

Resolution:

  1. Verify Disk Capacity:
    Use the following DDOS CLI command to check disk specifications:

    # disk show hardware

  2. Identify Incorrect Disk:
    Review the output for capacity mismatches. For example:

    • Expected: 4TB (3.6TiB)
    • Installed: 3TB (2.72TiB)
    • The disk capacity must match the others in the same enclosure (disk group)

  3. Replace Disk:

    • Remove the undersized disk from the system.
    • Install a disk of equal or greater capacity than the original failed disk.

  4. Confirm Compatibility:
    After replacement, verify that the new disk is recognized and usable as a spare.

Example:   
# disk show hardware
Disk         Slot   Manufacturer/Model         Firmware   Serial No.     Capacity    Type      Part Number

(enc/disk)

----------   ----   ------------------------   --------   ------------   ---------   -------   ------------------------

1.1          0      KIOXIA  KPM6XRUG960G       BA08       7120A0Unnn   894.2 GiB   SAS-SSD   PH06N7KYTBPKK1720O8ZA00

1.2          1      KIOXIA  KPM6XRUG960G       BA08       7120A0Tnnn   894.2 GiB   SAS-SSD   PH06N7KYTBPKK1720O8HA00

1.3          2      KIOXIA  KPM6XRUG960G       BA08       7130A11nnn   894.2 GiB   SAS-SSD   PH06N7KYTBPKK1730OP6A00

1.4          3      KIOXIA  KPM6XRUG960G       BA08       7130A11nnn   894.2 GiB   SAS-SSD   PH06N7KYTBPKK1730OP7A00

1.7          6      KIOXIA  KPM6XRUG1T92       BA08       7160A0Pnnn   1.7 TiB     SAS-SSD   PH04CN85TBPKK1760WD4A00

1.8          7      KIOXIA  KPM6XRUG1T92       BA08       7150A2Lnnn   1.7 TiB     SAS-SSD   PH04CN85TBPKK1750VWXA00

2.1          0      SEAGATE STCRSNI3CLAR4000   CD03       WS22nnn       3.6 TiB     SAS       DG118000921

2.2          1      SEAGATE STCRSNI3CLAR4000   CD03       WS22nnn       3.6 TiB     SAS       DG118000921

2.3          2      SEAGATE STCRSNI3CLAR4000   CD03       WS22nnn       3.6 TiB     SAS       DG118000921

2.4          3      SEAGATE STCRSNI3CLAR4000   CD03       WS22nnn       3.6 TiB     SAS       DG118000921

2.5          4      SEAGATE STCRSNI3CLAR4000   CD03       WS22nnn       3.6 TiB     SAS       DG118000921

2.6          5      SEAGATE STCRSNI3CLAR4000   CD03       WS22nnn       3.6 TiB     SAS       DG118000921

2.7          6      SEAGATE ST330006CLAR3000   YS18       Z293VAV3      2.72 TiB    SAS       <<<<--- Incorrect Disk installed

2.8          7      SEAGATE STCRSNI3CLAR4000   CD03       WS22nnn       3.6 TiB     SAS       DG118000921

2.9          8      SEAGATE STCRSNI3CLAR4000   CD03       WS22nnn       3.6 TiB     SAS       DG118000921

2.10         9      SEAGATE STCRSNI3CLAR4000   CD03       WS22nnn       3.6 TiB     SAS       DG118000921

2.11         10     SEAGATE STCRSNI3CLAR4000   CD03       WS22nnn       3.6 TiB     SAS       DG118000921

2.12         11     SEAGATE STCRSNI3CLAR4000   CD03       WS22nnn       3.6 TiB     SAS       DG118000921

2.13         12     SEAGATE STCRSNI3CLAR4000   CD03       WS22nnn       3.6 TiB     SAS       DG118000921

2.14         13     SEAGATE STCRSNI3CLAR4000   CD03       WS22nnn       3.6 TiB     SAS       DG118000921

2.15         14     SEAGATE STCRSNI3CLAR4000   CD03       WS22nnn       3.6 TiB     SAS       DG118000921

  

        


        

        
        
Affected Products

        Data Domain, Data Domain, Data Domain Deduplication Storage Systems, PowerProtect Data Protection Hardware
    
Products

        DS60, ES20, ES30







                        

                            

    

        

            

                
                    
 Article Properties

                
            

            

                

                        
Article Number: 000203701

                

                
                

                        
Article Type: How To

                

                

                        
Last Modified: 17 Oct 2025


                

                    

                            
Version:  5

                    


            


        

    

    

        

            

                
                    
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