Msvm_StorageAlert class
Represents an event that is raised each time the OperationalStatus property of the Msvm_ResourcePool or Msvm_LogicalDisk class changes.
The following syntax is simplified from MOF code and includes these properties.
Syntax
[Indication, Provider("VmmsWmiInstanceAndMethodProvider"), AMENDMENT]
class Msvm_StorageAlert : CIM_AlertIndication
{
string AlertingManagedElement[];
uint16 AlertingElementFormat;
uint16 OtherAlertingElementFormat;
uint16 AlertType;
uint16 PerceivedSeverity;
uint16 ProbableCause;
string ProbableCauseDescription;
datetime EventTime;
string OwningEntity;
string MessageArguments[];
string MessageID;
string Message;
};
Members
The Msvm_StorageAlert class has these types of members:
Properties
The Msvm_StorageAlert class has these properties.
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AlertingElementFormat
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Data type: uint16
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Access type: Read-only
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Qualifiers: ModelCorrespondence ("CIM_AlertIndication.AlertingManagedElement", "CIM_AlertIndication.OtherAlertingElementFormat")
Specifies the format of the AlertingManagedElement property. The format is a CIMObjectPath, with the format <NamespacePath>:<ClassName>.<Prop1>=\"<Value1>\", "<Prop2>=\"<Value2>\", which specifies an instance in the CIM Schema.
This property is inherited from the CIM_AlertIndication class.
The possible values are:
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Unknown (0)
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Other (1)
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CIMObjectPath (2)
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AlertingManagedElement
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Data type: string array
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Access type: Read-only
The WMI paths of the instance for which the alert is generated.
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AlertType
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Data type: uint16
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Access type: Read-only
Specifies the primary classification of the alert. The possible values for this property are:
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Quality of Service Alert (3)
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EventTime
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Data type: datetime
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Access type: Read-only
The date and time at which the underlying event was detected.
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Message
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Data type: string
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Access type: Read-only
A formatted message that is constructed by combining some or all of the dynamic elements that are specified in the MessageArguments property with the static elements uniquely identified by the MessageID property in a message registry or other catalog associated with the OwningEntity property.
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MessageArguments
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Data type: string array
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Access type: Read-only
An array that contains the dynamic content of the message. If the value of MessageID is 32930, the argument at position 0 is the PoolID of the Msvm_ResourcePool instance for which the alert is generated.
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MessageID
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Data type: string
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Access type: Read-only
Uniquely identifies, within the scope of the OwningEntity property, the format of the Message property. The possible values for this property are:
32930 ("Storage Pool QoS Insufficient Throughput Message")
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OtherAlertingElementFormat
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Data type: uint16
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Access type: Read-only
A string that defines "Other" values for AlertingManagedElement. This value MUST be set to a non NULL value when AlertingManagedElement is set to a value of 1 ("Other"). For all other values of AlertingManagedElement, the value of this string must be set to NULL.
This property is inherited from the CIM_AlertIndication class.
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OwningEntity
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Data type: string
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Access type: Read-only
Uniquely identifies the entity that owns the definition of the format of the Message described in this instance. The value of this property is always "Microsoft-Windows- Hyper-V."
"Microsoft-Windows- Hyper-V"
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PerceivedSeverity
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Data type: uint16
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Access type: Read-only
Describes the severity of the alert indication. The possible values for this property are:
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Information (2)
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Degraded/Warning (3)
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ProbableCause
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Data type: uint16
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Access type: Read-only
Describes the probable cause of the situation that resulted in the alert indication.
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Storage Capacity Problem (50)
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Previous Alert Cleared (59)
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ProbableCauseDescription
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Data type: string
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Access type: Read-only
A textual description that corresponds to the value of the ProbableCause property.
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Remarks
The Hyper-V WMI provider won't raise events for individual virtual disks to avoid flooding clients with events in case of large scale malfunctions of the underlying storage systems.
When a client receives an Msvm_StorageAlert event, if the value of the ProbableCause property is 50 ( Storage Capacity Problem ), the client can discover which virtual disks are operating outside their QoS policy by using one of these procedures:
- Query all the Msvm_LogicalDisk instances that were allocated from the resource pool for which the event was generated. These Msvm_LogicalDisk instances are associated to the resource pool via the Msvm_ElementAllocatedFromPool association.
- Filter the result list by selecting instances whose OperationalStatus contains Insufficient Throughput .
Requirements
| Requirement | Value |
|---|---|
| Minimum supported client |
Windows 8.1 [desktop apps only] |
| Minimum supported server |
Windows Server 2012 R2 [desktop apps only] |
| Namespace |
Root\Virtualization\V2 |
| MOF |
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| DLL |
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