// Copyright (c) 2011 DMTF.  All rights reserved.
   [Experimental, Version ( "2.29.0" ), 
    UMLPackagePath ( "CIM::Device::StorageServices" ), 
    Description ( 
       "This class represents a collection of storage objects, such as "
       "a collection of StorageExtents identified as a storage tier." )]
class CIM_StorageTier : CIM_SystemSpecificCollection {

      [Description ( 
          "A number starting from 0 to indicate the relative "
          "performance characteristics of the storage tier. The "
          "smaller the number, the higher the performance "
          "characteristics." )]
   uint16 RelativePerformanceOrder;

      [Description ( 
          "This property indicates the type of storage objects "
          "comprising a storage tier." ), 
       ValueMap { "0", "1", "2", "3", "4", "..", "0x8000.." }, 
       Values { "Unknown", "Other", "StorageExtent", "StoragePool", 
          "StorageVolume", "DMTF Reserved", "Vendor Specific" }]
   uint16 StorageObjectType;

      [Description ( 
          "The technology of the underlying disk drives used. Not "
          "Applicable: Storage tier is not based on technology of "
          "underlying components. \n"
          "Mixed: a storage tier consists of a mix of different "
          "disk drive technologies." ), 
       ValueMap { "0", "1", "2", "3", "4", "5", "6", "7", "8", "..", 
          "0x8000.." }, 
       Values { "Unknown", "Other", "Not Applicable", 
          "Solid State Drive", "Fibre Channel", "SATA", "SAS", 
          "Mixed", "Hard Disk Drive", "DMTF Reserved", 
          "Vendor Specific" }]
   uint16 Technology;

      [Write, Description ( 
          "This property indicates whether the storage tier is "
          "actively being used or not." ), 
       ValueMap { "0", "1", "2", "3", "..", "0x8000.." }, 
       Values { "Unknown", "Other", "Enabled", "Disabled", 
          "DMTF Reserved", "Vendor Specific" }]
   uint16 State;

      [Write, Description ( 
          "If true any new objects added to the system that have a "
          "similar performance characteristics (and QoS) to this "
          "tier become part of this tier automatically. If false, "
          "the new objects needs to be added to this tier manually." )]
   boolean Dynamic = false;

      [Write, Description ( 
          "If true and empty storage tiers are allowed, the storage "
          "tier will be deleted when the last component object is "
          "removed from the storage tier. If empty storage tiers "
          "are not allowed, the storage tier will be deleted "
          "automatically when the last component object is removed "
          "from the storage tier." )]
   boolean DeleteOnEmptyStorageTier = false;

      [Write, Description ( 
          "A value between 0 to 100 to indicate the maximum "
          "percentage of the underlying capacity that can be used "
          "for storage tiering activities. For example, a value of "
          "80 indicates no more than 80 percent of the storage tier "
          "can be used for automated tiering. The remaining 20 "
          "percent of the underlying storage is set aside for "
          "elements that do not participate in automated storage "
          "tiering." )]
   uint16 Percentage;

      [Description ( 
          "The total capacity of the storage tier in bytes." ), 
       PUnit ( "byte" )]
   uint64 TotalCapacity;


};