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What does "callhome.spares.low" mean

Last Updated:

Applies to


This message occurs when one or more RAID groups do not have an eligible spare disk drive available in case of a disk drive failure. callhome.spares events

  • An eligible spare disk drive must be the correct size and capacity and must be in the appropriate pool.
    • If a disk drive fails without a spare to reconstruct on, the system enters degraded mode.
  • If your system is configured to do so, it generates and transmits an AutoSupport (or ''call home'') message to NetApp technical support and to the configured destinations.

Additional Information

  • With the ONTAP 9.12.1 code change via Bug ID 944990 - System no longer halts if a RAID aggregate remains degraded for 24 hours, the default system behavior is changed to not halt if an aggregate is completely degraded.
    • If you wish to preserve the previous behavior, set the raid.timeout option to a nonzero value in order for the system to shut down on expiry of the timeout period.
    • cluster::> storage raid-options modify -node node1 -name raid.timeout 48

    • Warning: RAID option "raid.timeout" value will be changed to "48". Changes to the recommended value should be made  with guidance from technical support. Use the "storage raid-options show -name raid.timeout" command to check the recommended value.
      Do you want to continue? {y|n}: y

      You are changing option raid.timeout, which applies to
      both members of the HA configuration in takeover mode.
      This value must be the same on both HA members to ensure correct 
      takeover and giveback operation.
      2 entries were modified.

    • ONTAP 9.12.1 "monitor" events
  • Prior to ONTAP 9.12.1, the default behavior for a storage system is to halt after 24 hours if a RAID aggregate is completely degraded and spare disks are not available for reconstruction. The definition of "completely degraded" depends on the RAID group types used by the aggregate:
    • raid4 - RAID group has one missing or failed disk
    • raid-dp - RAID group has two missing or failed disks
    • raid-tec - RAID group has three missing or failed disks
    • A mirrored aggregate is considered "completely degraded" if both plexes of the aggregate has missing or failed disks in the same positional RAID group.
      • The system halts automatically to prevent another disk drive failure, and possible loss of data, if it runs in completely degraded mode for the time interval given by the following command: "storage raid-options show -name raid.timeout -node local"
      • The default timeout is usually 24 hours.
  • SPARES_LOW ERROR messages when using ADP
  • How low spare warnings can help you manage your spare disks
  • How to partition a drive manually in ONTAP 9
  • Why am I getting a SPARES LOW warning?


NetApp provides no representations or warranties regarding the accuracy or reliability or serviceability of any information or recommendations provided in this publication or with respect to any results that may be obtained by the use of the information or observance of any recommendations provided herein. The information in this document is distributed AS IS and the use of this information or the implementation of any recommendations or techniques herein is a customer's responsibility and depends on the customer's ability to evaluate and integrate them into the customer's operational environment. This document and the information contained herein may be used solely in connection with the NetApp products discussed in this document.
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