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Disk Lock
These features are supported on Windows Embedded Standard 7 only.
Configure support for Enhanced Write Filter (EWF) and Hibernate Once Resume Many (HORM).
EWF write-protects the system volume (C: drive). Though the user may appear to be able to write to the C: drive, the
changes are actually stored in RAM.
HORM provides additional functionality over EWF. When HORM is enabled the Thor VM2 resumes from the hibernate
image rather than restarting,
Current State
Lists the current state of the specified volume, i.e.: EWF Enabled/Disabled, HORM Active/Inactive.
Tap the Apply button to apply any changes made. A restart may be required for the changes to take effect. If so, a
warning box is displayed with an option to restart now or restart later. If restart later is selected, the changes do not
take effect until after the restart. At anytime before the restart, returning to this control panel and tapping Cancel dis-
cards those changes.
Tap Cancel to exit without making any changes.
The disk lock options are detailed below. If prompted with a User Access Control prompt when opening this control
panel, tap Yes to allow the program to make changes.
Save changes to locked disk and update HORM image
Use this option to save changes to the previous HORM image. If this option is selected, the Thor VM2 must be
restarted. After the restart, select Hibernate the Thor VM2 to update the HORM image.
Lock disk (enable EWF), standard hibernate
EWF is enabled but HORM is inactive.:
• The user can make changes to drive C:. These changes are stored in RAM rather than written to the C: drive,
• These changes persist across a Hibernate cycle.
• These changes are lost after a Restart or Shutdown cycle.
Lock disc (enable EWF), hibernate once resume many (HORM)
EWF is enabled and HORM is active.
• The user can make changes to drive C:. These changes are stored in RAM rather than written to the C: drive.
• These changes persist across a Hibernate cycle.
• When a user selects Restart the Thor VM2 does not perform a traditional restart. Instead the Thor VM2 shuts down
and then resumes from the HORM image. Any user-made changes persist across the restart cycles.
• When a user selects Shutdown the Thor VM2 shuts down. When the Thor VM2 is restarted it resumes from the
HORM image rather than perfomr a traditional restart. Any user-made changes persist across the restart cycles.
• By hibernating rather than restarting, the Thor VM2 boots up faster.
Unlock disk
EWF is disabled and HORM is inactive.