EwfMgrSetPersistentData (Standard 7 SP1)
7/8/2014
This function sets the persistent data for an Enhanced Write Filter (EWF)-protected volume. Persistent data (32 bytes per protected volume) is retained through all EWF operations. This includes Disable, Enable, and Restore operations.
Syntax
BOOL EwfMgrSetPeristentData(
HANDLE hDevice,
LPBYTE lpPersistentData,
DWORD cbPersistentData
);
Parameters
- hDevice
[in] Handle to the EWF-protected volume.
- lpPersistentData
[in] Long pointer to a buffer that contains the persistent data to save.
- cbPersistentData
[in] Specifies the size, in bytes, of the buffer pointed to by lpPersistentData. Only the first 32 bytes (EWF_MAX_PERSISTENT_DATA) are saved.
Return Value
If the function succeeds, the return value is TRUE. If the function fails, the return value is FALSE. Call GetLastError for extended error information.
Remarks
This function is supported on RAM overlays with an associated EWF overlay store tracking its protection settings. However, it is not supported on RAM overlays that are described only within the registry.
This function stores EWF-specific state information and can be useful when you update a device. Persistent data is stored in the EWF volume store.
Example
The DoEwfPersistCommands function included in EWF API Code Sample (Sample.cpp), show you how to use the EwfMgrSetPeristentData function.
Requirements
OS Versions: Standard 7
Header: Ewfapi.h
Link Library: Ewfapi.lib