Using EWF (RAM overlay) w CompactFlash - not enough RAM

[Ben]

We are using XPe on CompactFlash device and tried to implement EWF.
Our XPe footprint image has ~350MB. There is only CompactFlash drive
on the unit, so we have to use EWF RAM overlay technique.

But as our XPe image is 350MB, and our system is limited to 512MB of
RAM, loosing 350MB of RAM for EWF, which leave ~ 162MB to execute
application is not viable.

The solution we use for now is to disable the virtual memory, so it
limits the amount of write to CF, but there is still data written (ex.
Windows registry update, system log file, ... ) 2-3 MBytes of data
written after every boot up.

Is there anybody out there who face the same problem and what did you
do?

Could we split the XPe image size in 2 partitions, so we would put
Windows system log file, ... everything frequently updated by Windows,
in one smaller partition, protect this partition w EWF, and take less
RAM for EWF?

Is there other technique to reduce the amount of data written to
CompactFlash?

Any suggestion would be greatly appreciated!

Thanks in advance,

Ben.

 

[Nandini Shenoy]

Ben,

Please refer to this tip article for some tips on reducing the number of
writes to your protected volume.

http://msdn.microsoft.com/embedded/community/community/tips/xp/ramewf/defaul
t.aspx

Thanks
Nandini [MS]

 

[Ben]

Ben,

Please refer to this tip article for some tips on reducing the number of
writes to your protected volume.

http://msdn.microsoft.com/embedded/community/community/tips/xp/ramewf/defaul
t.aspx

Thanks
Nandini [MS]

Hello Nandini,

Thanks for the info.

Is there a way to know the amount of RAM used by the EWF since the last boot?

Ben.

 

[KM]

Ben,

ewfmgr <protected_drive_letter>: - will show you the EWF memory usage along with other info.

--
Regards,
KM, BSquare Corp.

Ben,

Please refer to this tip article for some tips on reducing the number of
writes to your protected volume.

http://msdn.microsoft.com/embedded/community/community/tips/xp/ramewf/defaul
t.aspx

Thanks
Nandini [MS]

Hello Nandini,

Thanks for the info.

Is there a way to know the amount of RAM used by the EWF since the last boot?

Ben.

 

[Nandini Shenoy]

You can use ewfmgr to find that out. You can type ewfmgr <your protected
volume>, to get more information. To find out the percentage of the EWF
volume that can be filled, you can use the ewfmgr gauge switch.

Please refer to this article

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/xpehelp/htm
l/xetskewfmanagerusage.asp

Thanks
Nandini[MS]