EWF_VOLUME_CONFIG

This read-only structure contains configuration information about an Enhanced Write Filter (EWF)-protected volume.

  typedef struct _EWF_VOLUME_CONFIG
{
    EWF_TYPE 
  Type
  ;
    EWF_STATE 
  State
  ;
    EWF_COMMAND 
  BootCommand
  ;
    UCHAR 
  PersistentData
  [EWF_MAX_PERSISTENT_DATA];
    USHORT 
  MaxLevels
  ;
    ULONG 
  ClumpSize
  ;
    USHORT 
  CurrentLevel
  ;
    union
    {
      struct
      {
        LONGLONG 
  DiskMapSize
  ;
        LONGLONG 
  DiskDataSize
  ;
      } DiskOverlay;
      struct
      {
        LONGLONG 
  RamDataSize
  ;
      } RamOverlay;
    };
    ULONG 
  MemMapSize
  ;
    EWF_VOLUME_DESC 
  VolumeDesc
  ;
    EWF_LEVEL_DESC 
  LevelDescArray
  [1];
  } EWF_VOLUME_CONFIG, * PEWF_VOLUME_CONFIG;

Members

• Type
  Specifies the type of overlay for this volume: RAM, registry-described RAM, or disk.
• State
  Specifies the state of the overlay for this volume. The state can be either enabled or disabled.
• BootCommand
  Specifies a command to be executed on restart.
• PersistentData
  Data that survives disable, enable, and restore operations. Persistent data size is EWF_MAX_PERSISTENT_DATA (32 bytes by default).
• MaxLevels
  Maximum number of checkpoint levels in the overlay.
• ClumpSize
  Size of the clumps, in bytes. ClumpSize must be 512 bytes.
• CurrentLevel
  Current checkpoint level.
• DiskMapSize
  Size of the mapping data that is contained on disk for the protected volume, in bytes (only for disk overlays).
• DiskDataSize
  Size of the data to be stored on disk for the protected volume, in bytes (only for disk overlays).
• RamDataSize
  Size of the data to be stored in RAM for the protected volume, in bytes (only for RAM overlays).
• MemMapSize
  Size of the mapping data that is contained in memory for the protected volume, in bytes.
• VolumeDesc
  Volume device name and volume ID.
• LevelDescArray
  Level description and end time, and level data size. Number of entries is specified by MaxLevels.

Requirements

OS Versions: Windows XP Embedded.
Header: Ewfapi.h.
Link Library: Ewfapi.dll, Ewfapi.lib.

See Also

EwfMgrGetProtectedVolumeConfig | EWF API Functions | EWF API Code Sample

Last updated on Wednesday, October 18, 2006

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