Enhanced Write Filter (Ewf) - Eurotech Apollo Quick Start Manual

APOLLO Windows XP Embedded Quickstart
Files and folders on the APOLLO can be shared, allowing easy access from another
system. To share a folder on the APOLLO:
1 Right-click on the folder.
2 Select Sharing and Security.
3 Assign a name to the share.
If you want to join the APOLLO to an XP domain-based network, you must change
from a workgroup to a domain-based network and enter the name of the domain you
wish to join. To do this, follow these steps:
Select Start → Control Panel → System → Computer Name → Change →
1
Domain.
2 Enter the name of the domain you want to join and click on OK.
You are asked for the user name and password of an account with permission to
join the domain. You need to obtain this information from your network
administrator.
3 Enter the user name and password, and click on OK. Once the APOLLO appears
in your network neighbourhood, files can be copied to and from the board in the
same way as with any other desktop system on the network.

Enhanced Write Filter (EWF)

RAM-Reg Enhanced Write Filter (EWF) allows you to protect the operating system so
that any writes to the flash memory are not permanent. Instead, they are redirected to
an overlay in RAM memory so that whilst the operating system is running they appear
permanent, but when it is shutdown or rebooted the RAM overlay writes are discarded
and the operating system reverts to the same state it was in at the previous boot.
The Standard XPe image is supplied with RAM-Reg EWF functionality included but
disabled. A utility called Eurotech Ltd EWF Manager is located on the desktop and in
the Start menu. This utility can be used to enable and control the status of EWF.
When the status of the EWF is changed, the update will not happen immediately. The
change only takes effect as the operating system is shut down. When you exit
Eurotech Ltd EWF Manager, you may be prompted to restart the machine to apply any
changes.
An API is included that allows the user to query and control the status of EWF from
within their application. Full details of the functions and structures, along with some
sample code, can be found at www.msdn.microsoft.com.
© 2007 Eurotech Ltd Issue E
Using the supplied Windows XP Embedded image
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