Snapshot errors with IBM DS6000 and DS8000 arrays (NetBackup status code 156)
Note these possible explanations:
Table: Issues encountered with Snapshot (NetBackup status code 156)
Issue | Explanation/Recommended Action |
|---|---|
The snapshot device (clone) is not visible (unmasked) to the NetBackup client or alternate client. | Make the clone device visible to the NetBackup client or alternate client before you retry the backup. Contact IBM technical support or refer to your IBM array documentation. |
The snapshot device (clone) is also a source device in another device pair. The following message may appear in the CMUN03041E mkflash: Copy Services operation failure: already a FlashCopy source | Reconfigure source and clone devices so that the clone required for this backup is not a source device for another clone. Contact IBM technical support or refer to your IBM array documentation. |
The snapshot device (clone) and source device are not of equal size. The following message may appear in the CMUN03049E mkflash: Copy Services operation failure: incompatible volumes | Reconfigure source and clone devices to be identical in size. Contact IBM technical support or refer to your IBM array documentation. |
The source device is already recording enabled for FlashCopy. The following message may appear in the CMUN03027E mkflash: FlashCopy operation failure: action prohibited by current FlashCopy state. Contact IBM technical support for assistance. | Verify whether the source device has a FlashCopy relationship with some device other than the snapshot device (clone) specified in the policy. If a FlashCopy relationship exists with some other device, delete the relationship and start the backup again. |
The IBM FlashCopy license is not installed. The following message may appear in the CMUN03035E mkflash: Copy Services operation failure: feature not installed. | Install the FlashCopy license on the storage subsystem. Contact IBM technical support or refer to your IBM array documentation. |
The FlashCopy relationship is not recording enabled. The following message may appear in the CMUN03027E resyncflash: FlashCopy operation failure: action prohibited by current FlashCopy state. Contact IBM technical support for assistance |
|
A FlashCopy relationship does not exist. The following message may appear in the CMUN03027E resyncflash: FlashCopy operation failure: action prohibited by current FlashCopy state. Contact IBM technical support for assistance. A resynchronize operation was attempted on a FlashCopy pair that does not exist. | Verify that a FlashCopy pair does not exist, and then re-execute the backup. |
Incremental Copy is in progress. The following message may appear in the CMUN02498E resyncflash: The storage unit is busy. This message can appear for the following reasons:
| Allow the background copy or maintenance activity to complete. Then re-run the backup. |
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