Re: What "EWF RAM REG" XPE computer can do???
- From: "XPEnew" <new@xxxxxxx>
- Date: Tue, 20 Sep 2005 09:06:10 -0700
Matt, thank you very much!
Our PC has 128 or 256MB, are they too small???
"Matt Kellner (MS)" <mattkell@xxxxxxxxxxxxx> wrote in message
news:%230MYjxwuFHA.3596@xxxxxxxxxxxxxxxxxxxxxxx
> Hi XPEnew.
>
> On 1: How much memory does your target system have? The lower the amount
of
> RAM, the more likely you are to see the "Delayed Write Failed" message.
> This is usually a result of the system running out of memory. (Keep in
mind
> that RAM and RAM Reg overlays store all write operations in memory, so the
> memory overlay grows as more data is written.)
>
> Also, ensure that your configuration is not setup to use a swap file. If
> you have a swap file in your runtime, this will eat up your RAM overlay
very
> quickly.
>
> On 2: This is by design. The EWF RAM and RAM Reg overlays intercept all
> write operations intended for the hard drive that you're protecting -
hence
> the name "Enhanced Write Filter". Because these writes are now stored in
> RAM, all writes (including files saved to the protected partition) are
lost
> when the computer reboots or shuts down.
>
> If you want to be able to save files to the CF device (such as from your
> application), I would recommend partitioning your CF device into two or
more
> partitions. You would install your OS onto the first partition and setup
> EWF to protect that partition. Then you would designate the other
> partition(s) for storing persistent data, and you'd configure your
> application to save to that unprotected partition. This allows you to
> persist the data you want while still experiencing the benefit of having
EWF
> protect your operating system and your CF device.
>
> I wrote an article on a related subject a couple of months ago. Check it
> out here: http://blogs.msdn.com/embedded/archive/2005/07/08/437033.aspx .
>
> --
> Matt Kellner (mattkell@xxxxxxxxxxxxxxxxxxxx)
> STE, Windows Embedded Group
>
> This posting is provided "AS IS" with no warranties, and confers no
rights.
> ===============================
>
> "XPEnew" <new@xxxxxxx> wrote in message
> news:%23BufmhuuFHA.3260@xxxxxxxxxxxxxxxxxxxxxxx
> > Hello,
> >
> > I'm totally new to XPE "EWF RAM REG" image, but we need to build a
image
> > for 1G or 2G CF, so I followed the instruction to build "EWF RAM REG",
> > after FBA, I can run this XPE( I use a regular HD for making image and
> > testing now, not CF), but after for a while,
> >
> > 1 "Delayed Write failed" keep popping up if I run Internet Explorer, I
> > have to restart the computer, I then followed the trouble shooting
> > suggestions, like disable auto defragmentation... but still same, I
still
> > see this message pop up when I try to install program or go to
Internet...
> >
> > 2. I save some files to hard drive, but after I restart computer, all
> > lost!
> >
> >
> > We actually want to install some retail POS software in to this XPE with
> > 1G
> > CF, so looks like we can't use CF at all for this??? What the usage for
> > making "EWF RAM REG" computer??
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
>
>
.
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