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PowerStore Alerts: Scheduled Snap Alerts

Summary: PowerStore Scheduled Snap alerts occured due to Internal errors, No free slot for creation, Supported only for VM’s which are vVol based, Insufficient available space on the virtual machine, Snapshot Limit Reached, The system is busy, Data Path failed and limits reached issues. ...

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Article Content


Symptoms

When Dell PowerStore encounters a problem, an error alert is generated to help identify the issue. This article explains the different possible causes and the relevant solutions for these error alerts. If your problem is not resolved despite the solution provided, check the technical support contact options.

 

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Cause

Cause for respective alerts has been updated in the Resolution section.

Resolution

Alert ID POLICY_SCHEDULED_SNAP_CLEANUP_FOR_VIRTUAL_MACHINE_FAILED
Alert Text Expired virtual machine snapshot(s) cleanup failed with error %(error_message_key)
Error Code (0x00906D01)
Description Removal of an expired scheduled virtual machine snapshots failed.
Resolution Cause
Internal errors detected: One or more internal errors detected while deleting expired virtual machine snapshot.

Solution
Virtual machine snapshot deletion is done by triggering corresponding operation in vCenter using its web Application Program Interface (API) 
  • Check that vCenter is reachable, can be logged in via User Interface (UI) and works well.
  • Check that vCenter credentials configured in PowerStore are valid, that PowerStore can access the vCenter and it can trigger snapshot deletion.
  • Check on vSphere for errors and alerts and fix issue(s) caused them.
  • If the issue persists, call technical support.
 

 

Alert ID POLICY_SNAP_REMOVING_FOR_VIRTUAL_MACHINE_FAILED
Alert Text Removing the closest expiring snapshot %(snap_name) for vm %(source_name) failed with error %(error_message_key)
Error Code (0x00906C01)
Description Removal of a scheduled virtual machine snapshot failed.
Resolution Cause
Internal errors detected: One or more internal errors detected while deleting scheduled virtual machine snapshot.

Solution
Virtual machine snapshot deletion is done by triggering corresponding operation in vCenter using its web Application Program Interface (API).
  1. Check that vCenter is reachable, can be logged in via User Interface (UI) and works well.
  2. Check that vCenter credentials configured in PowerStore are valid, that PowerStore can access the vCenter and it can trigger snapshot deletion.
  3. Check on vSphere for errors and alerts and fix issue(s) caused them.
  4. If the issue persists, call technical support.
 

 

Alert ID POLICY_SCHEDULED_SNAP_CREATION_FROM_VIRTUAL_MACHINE_NO_SLOT_FOR_SCHEDULED_SNAPSHOT
Alert Text Skipping creation of scheduled snapshot from virtual machine %(source_name) because there is no free slot for scheduled snapshot
Error Code (0x00906B04)
Description Creation of a scheduled virtual machine snapshot failed.
Resolution Cause
No free slot for creation: Scheduler system detected that there is no free slot for creation the next scheduled virtual machine snapshot. It means that all the virtual machine snapshots in current hierarchy are created by the user. Scheduler system is unable to free the slot for creation the next scheduled snapshot.

Solution
To continue creation of scheduled virtual machine snapshots there must be at least one free slot. Manually deletion of user created snapshot will free slot for scheduler system and will allow the scheduler to create the snapshot.
Another way to recover from this alert is to remove and create a new protection policy from the corresponding virtual machine. Note: all existing snapshots will not be impacted after removing the protection policy.  
 

 

Alert ID POLICY_SCHEDULED_SNAP_CREATION_FROM_VIRTUAL_MACHINE_NOT_VVOL_DISK_DETECTED
Alert Text Skipping creation of scheduled snapshot from virtual machine %(source_name) because there is no free slot for scheduled snapshot.
Error Code (0x00906B03)
Description Creation of a scheduled virtual machine snapshot failed.
Resolution Cause
Supported only for VM’s which are vVol based: Creation of scheduled virtual machine snapshots is supported only for virtual machines which are vVol based. It means that virtual machine is created only on vVol storage containers and has only vVol based disks. Current virtual machine is not vVol based.

Solution
Ensure the virtual machine backed by the vVol storage and has only disks which are based on vVol storages. Removal of all non vVol based disks will allow scheduler to create next scheduled snapshot. Another way to recover this alert is to remove protection policy from the corresponding virtual machine.
 

 

Alert ID POLICY_SCHEDULED_SNAP_CREATION_FROM_VIRTUAL_MACHINE_INSUFFICIENT_DISK_SPACE
Alert Text Skipping creation of scheduled snapshot from virtual machine %(source_name) because there is no space for a snapshot
Error Code (0x00906B05)
Description Creation of a scheduled virtual machine snapshot failed
Resolution Cause
Insufficient available space on the virtual machine: Insufficient available space on the virtual machine storage for creation the next scheduled virtual machine snapshot.

Solution
  1. Ensure there is enough free space on the virtual machine storage to continue scheduled virtual machine snapshot creation.
  2. Alternative option to clear this alert is to remove the protection policy from the corresponding virtual machine.
 

 

Alert ID POLICY_SCHEDULED_SNAP_CREATION_FROM_VIRTUAL_MACHINE_GENERIC_FAIL
Alert Text Scheduled snap creation from %(source_name) using %(rule_name) failed with error %(error_message_key)
Error Code (0x00906B07)
Description Creation of a scheduled virtual machine snapshot failed
Resolution Cause
Internal errors detected: One or more internal errors detected while creation of scheduled virtual machine snapshot.

Solution
Virtual machine snapshot creation is done by triggering corresponding operation in vCenter using its web Application Program Interface (API).
  1. Check that vCenter is reachable, can be logged in via User Interface (UI) and works well.
  2. Check that vCenter credentials configured in PowerStore are valid and that the PowerStore can access the vCenter to trigger snapshot deletion.
  3. Check vSphere side errors and alerts and fix issue(s) caused them.
  4. Another way to recover this alert is to remove and recreate the protection policy from the corresponding virtual machine.
  5. Scheduled snapshot creation failure may result in this alert.
5.a) In this case the following event will be raised: '0x00906B07 Creating a snapshot from <VM name> using the <snapshot rule name> rule failed with error: An internal error occurred in VM services. Contact your support provider'
image.png

5.b) Find the snapshots in VM snapshot list and delete them. On the screenshot below snapshot named 'rule0.IO0.2022-10-20T09:30:00Z 000000000' should be deleted. Select the snapshot and click 'Delete' button.
image.png

  1. Try rebooting primary node of PowerStore. For considerations and instructions for reboot refer to Dell EMC PowerStore Power Down and Reboot Procedures Guide.   
      
 

 

Alert ID POLICY_SCHEDULED_SNAP_CREATION_FROM_VOLUME_GROUP_FAILED
POLICY_SCHEDULED_SNAP_CREATION_FROM_VOLUME_FAILED
Alert Text Scheduled snapshot creation from %(source_name) using the %(rule_name) rule failed with error: %(error_message_key)
Error Code (0x00906E01) (0x00906501)
Description The user has a protection policy created which contains a snapshot rule that is executed on a chosen interval. That protection policy is applied to a Volume or Volume Group, which results in snapshots being taken of those storage resources. This alert informs the user that one or more of those snapshot operations has failed.
Resolution Cause
Snapshot Limit Reached: One of the snapshot limits has been reached.

In the initial version of PowerStore the limitations are:
  • 256 snapshots per volume
  • 1,000 snapshots per volume family
  • 100,000 snapshots per appliance

Solution
Snapshots need to be deleted in order to get below the limit so that new snapshots can be created.
 

 

Alert ID POLICY_SCHEDULED_SNAP_CLEANUP_FOR_VOLUME_GROUP_FAILED
POLICY_SCHEDULED_SNAP_CLEANUP_FOR_VOLUME_FAILED
Alert Text Expired snapshot %(snap_name) cleanup failed with error: %(error_message_key) 
Error Code (0x00906F01) (0x00906701)
Description This alert reports that one or more snapshots failed to be deleted by the system. When a scheduled snapshot is created it is given an expiration time based on the requested 'retention' which is configured for the snapshot rule that is creating the snapshot. When that expiration time is reached the snapshot the system will attempty to automatically delete the snapshot.
Resolution 1 Cause
The system is busy: The system has an internal trashbin with a static size, and if that trashbin fills up and the system does not have the cycles to empty it, then its possible that deletion of a storage resource will fail.

Solution
Do nothing. The system will retry the delete of that storage resource later and it should succeed if the trashbin has the necessary space.
Resolution 2 Cause
Datapath failed to complete the bulk delete request: An internal error occurred within the system.

Solution
Do nothing. The system will retry the delete of that storage resource later. If the alert persists contact technical support.
 

 

Alert ID POLICY_SCHEDULED_SNAP_APPLIANCE_LIMIT_REACHED
Alert Text Scheduled snapshots were not created because the appliance limit of %(max_snaps_per_appliance) would have been exceeded
Error Code (0x00907001)
Description This alert is reported if one or more snapshot operations has failed because the appliance in question has reached its limit of snapshots and no additional snapshots can be created.
Resolution Cause
Limits reached: The system has a defined limit for the maximum number of snapshots allowed per appliance.

Solution
One or more of the following:
1. Manually delete snapshots
2. Lower the retention time on a snapshot rule so that snapshots will expire and be deleted more quickly.
 
 

Article Properties


Affected Product

PowerStore

Last Published Date

05 May 2024

Version

6

Article Type

Solution