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| | == How to use NEX-001 test program? == | | == How to use NEX-001 test program? == |
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| - | Enhanced Write Filter (EWF) provides the ability to write-protect a run-time image. By redirecting all write requests to either a separate disk partition(Disk mode) or RAM(Ram-Reg mode).
| + | [[Image:NEX-001test.jpg]] |
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| - | == How many modes does EWF has? ==
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| - | There are Disk mode and Ram-Reg mode.
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| - | == What's different about the modes? ==
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| - | '''Ram-Reg mode''' works by clear all the write requests when reboot.
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| - | 1.System will restore when reboot.
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| - | 2.Doesn't need any other invisible partition.
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| - | '''Disk mode''' works by the check point and restore.So Disk mode needs an invisible partition to save the write request of the check points.
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| - | 1.Can set 9 check points.
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| - | 2.Doesn't restore when reboot only if enter a restore commend.
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| - | 3.Need an invisible partition in storage.
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| - | 4.If you will do a big write request , ex:download some file , please disable the EWF first.
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| - | If the size of the write request is bigger than the size of the invisible partition. The WES will be crash.
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| - | 5.There are no Disk mode in WES7.
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| - | == The Sample code source you can download form ==
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| - | <Google Drive>
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| - | Source file: [https://drive.google.com/file/d/1b1dxzxEu7E7prDQnOY2uxKDE6azr2FBC/view?usp=sharing EWF_Manager_Src_v1.5]
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| - | Binary file: [https://drive.google.com/file/d/1Ut9oNVMGjV8bRdCYtloh-namnlroA3xq/view?usp=sharing EWF_Manager_Bin_v1.5]
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| - | <FTP>
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| - | Source file: [ftp://ftp.lex.com.tw/Engineer/SoftSupport/AP_Module/EWF/EWF_Manager_v1.5_Src.rar EWF_Manager_Src_v1.5]
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| - | Binary file: [ftp://ftp.lex.com.tw/Engineer/SoftSupport/AP_Module/EWF/EWF_Manager_v1.5_Bin.rar EWF_Manager_Bin_v1.5]
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| - | == How to use the DEMO application ==
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| - | [[Image:EWF.jpg]]
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| - | 1&2.Choose the EWF partition.
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| - | 3.Enable EWF.
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| - | 4.Disable EWF.
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| - | 5.Commit EWF-In RAM-Reg mod:Can do change on OS without reboot.In DISK mode,the layer will set to 1.
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| - | 6.Clear the command which you chose.
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| - | 7.Show the drive information.
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| - | 8.Show the EWF information.
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| - | 9.Reboot.
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| - | 10.After choose the EWF partition,here will show the EWF infomation.
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| - | 11.You can set checkpoint when DISK mode.
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| - | 12.Choose the layer which you want to restore.
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| - | 13.You can restore the system when DISK mode.
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| - | 14.Go to layer1 , and the other layer will disappear.
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| - | == Sample code Introduction ==
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| - | ===Do EWF Enable===
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| - | DWORD CEWF::DoEwfEnable(LPCWSTR szProVolName,BOOL bReboot)
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| - | {
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| - | DWORD dwStatus = ERROR_SUCCESS;
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| - | HANDLE hProVol = INVALID_HANDLE_VALUE;
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| - | BOOL bResult = FALSE;
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| - | // Use the volume name to open a handle to this protected volume.
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| - | hProVol = EwfMgrOpenProtected(szProVolName);
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| - | EwfMgrEnable(hProVol);
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| - | // This command requires a reboot to take effect.
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| - | if (bReboot) DoReboot();
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| - | return dwStatus;
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| - | }
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| - | | + | |
| - | ===Do EWF Disable===
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| - | DWORD CEWF::DoEwfDisable(LPCWSTR szProVolName , BOOL fCommit, BOOL bReboot)
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| - | {
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| - | DWORD dwStatus = ERROR_SUCCESS;
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| - | HANDLE hProVol = INVALID_HANDLE_VALUE;
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| - | BOOL bResult = FALSE;
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| - | // Use the volume name to open a handle to this protected volume.
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| - | hProVol = EwfMgrOpenProtected(szProVolName);
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| - | EwfMgrDisable(hProVol,fCommit);
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| - | // This command requires a reboot to take effect.
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| - | if (bReboot) DoReboot();
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| - | return dwStatus;
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| - | }
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| - | ===Do EWF Commit===
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| - | DWORD CEWF::DoEwfCommit (LPCWSTR szProVolName , BOOL bReboot)
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| - | {
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| - | DWORD dwStatus = ERROR_SUCCESS;
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| - | HANDLE hProVol = INVALID_HANDLE_VALUE;
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| - | BOOL bResult = FALSE;
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| - | // Use the volume name to open a handle to this protected volume.
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| - | hProVol = EwfMgrOpenProtected(szProVolName);
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| - | EwfMgrCommit(hProVol);
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| - | // This command requires a reboot to take effect.
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| - | if (bReboot) DoReboot();
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| - | return dwStatus;
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| - | }
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| - | ===Do Set checkpoint===
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| - | DWORD CEWF::DoEwfCheckPoint (LPCWSTR szProVolName, BOOL bReboot)
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| - | {
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| - | DWORD dwStatus = ERROR_SUCCESS;
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| - | HANDLE hProVol = INVALID_HANDLE_VALUE;
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| - | BOOL bResult = FALSE;
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| - | // Use the volume name to open a handle to this protected volume.
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| - | hProVol = EwfMgrOpenProtected(szProVolName);
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| - | EwfMgrCheckpoint(hProVol,L"Optional description");
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| - | // This command requires a reboot to take effect.
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| - | if (bReboot) DoReboot();
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| - | return dwStatus;
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| - | }
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| - | ===Do Restore===
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| - | DWORD CEWF::DoEwfRestore(LPCWSTR szProVolName, BOOL bReboot)
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| - | {
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| - | DWORD dwStatus = ERROR_SUCCESS;
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| - | HANDLE hProVol = INVALID_HANDLE_VALUE;
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| - | BOOL bResult = FALSE;
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| - |
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| - | // Use the volume name to open a handle to this protected volume.
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| - | hProVol = EwfMgrOpenProtected(szProVolName);
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| - | EwfMgrRestore(hProVol);
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| - | // This command requires a reboot to take effect.
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| - | if (bReboot) DoReboot();
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| - | return dwStatus;
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| - | }
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| - | ===Do EWF SetLevel===
| + | Enhanced Write Filter (EWF) provides the ability to write-protect a run-time image. By redirecting all write requests to either a separate disk partition(Disk mode) or RAM(Ram-Reg mode). |
| - | DWORD CEWF::DoEwfSetLevel(LPCWSTR szProVolName , BOOL bReboot)
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| - | {
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| - | DWORD dwStatus = ERROR_SUCCESS;
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| - | HANDLE hProVol = INVALID_HANDLE_VALUE;
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| - | BOOL bResult = FALSE;
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| - |
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| - | // Use the volume name to open a handle to this protected volume.
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| - | hProVol = EwfMgrOpenProtected(szProVolName);
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| - |
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| - | EwfMgrSetLevel(
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| - | hProVol,
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| - | L"Optional Description",
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| - | 0, // Level zero to be restored back to the protected volume.
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| - | FALSE); // Cannot delete the protected volumes data.
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| - | // This command requires a reboot to take effect.
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| - | if (bReboot) DoReboot();
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| - |
| + | |
| - | return dwStatus;
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| - | }
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Enhanced Write Filter (EWF) provides the ability to write-protect a run-time image. By redirecting all write requests to either a separate disk partition(Disk mode) or RAM(Ram-Reg mode).
