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Thread: Using EWF on regular WinXP

  1. #91
    FLAC SFiorito's Avatar
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    I got the SanDisk Extreme 1GB. Specs are here: http://www.sandisk.com/retail/ext-cf.asp -13 to 185 degrees Farhenheit. BTW, if you noticed on the MSDN site it talks about how to boot from a CF card with the removable flag. The interesting thing is they also say to use FAT32 if you don't need the security features of NTFS. They say that helps minimize writes even more, but for anyone with the VIA MII (which has a builtin CF reader) that means we could use VIA's FastBoot BIOS to improve boot speeds even more!!

  2. #92
    Constant Bitrate BOND007BE's Avatar
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    Hello , is there a STEP by STEP tutor or manual with an example or something .

    the link to MSDN works , but when ik click the configure compact flash nothing is displayed
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  3. #93
    Maximum Bitrate Rundell's Avatar
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    Quote Originally Posted by SFiorito
    but for anyone with the VIA MII (which has a builtin CF reader) that means we could use VIA's FastBoot BIOS to improve boot speeds even more!!
    I thought you could not boot from the compact flash reader in the MII. How would you accomplish this??
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  4. #94
    FLAC SFiorito's Avatar
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    Follow my instructions on the first page of this thread, that's basically what MSDN has. It's just a matter of placing some files in the right spot and entering some registry settings. If your CF card only shows up as removable media even with the CF-IDE adapter there are some special steps you need to take. For some reason that MSDN link is dead, but hopefully they'll get it back up soon.

    VIA has a special BIOS called FastBoot that will allow booting from the PCMCIA and CF slot on the MII. It's meant for Linux and WinCE devices, but since it says it supports FAT32 drives I assume it would work with XP installed on a FAT32 formatted CF card. We'll see. For now I'll have to wait because my CF card is still in transit. Once I get it I may try flashing my MII BIOS with FastBoot to see how well it works. FastBoot: http://www.viaarena.com/default.aspx...=41&DCatType=3

    *EDIT*: Okay, nevermind... it looks like FastBoot only looks specifically for a WinCE image or Linux image. There's the LinuxBIOS which has been reported to work on the MII, but I think I'll hold off on that for now.

    I'll try and do a writeup on how to setup EWF and with all our lessons learned so far. I won't get to it today, probably tomorrow though.

  5. #95
    Maximum Bitrate knubile's Avatar
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    I've already written a short step by step guide for doing preparing the OS image. I'll just format it and PDF if. Sfiorito, it would be great if you could add anything i'm missing. Unless you want to start from scratch anyways. I'll post it in a few.

  6. #96
    Nic
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    sweet guys, remember to include expected boot times in your documentation, i look foward to it
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  7. #97
    Maximum Bitrate knubile's Avatar
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    Here's the doc i've got so far.

    **EDIT** Link Updated
    PDF
    Word doc

    SFiorito, feel free to modify it with more detail. Especially the CF card part. I'm going to order mine soon. I already ordered the ide adapter.

  8. #98
    Maximum Bitrate Rundell's Avatar
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    Well, I'm going to have to do some testing and try this out and see if I can get something woking with the MII Card Reader. I have a 1GB Microdrive that I'll try it with. Thanks for the info, its a good start!
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  9. #99
    Maximum Bitrate knubile's Avatar
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    I think i left out one thing in the doc. You'll have to turn off the pagefile if you want it to fit on a 1G CF card and have a hibernate file. I've done this and haven't notice any adverse effects. My system build like the document says has been running for 3 days now flawlessly. It's running on a 1G partition on my laptop drive for now, until I get my CF card set up.

  10. #100
    FLAC SFiorito's Avatar
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    Okay, here's what I compiled from this thread and MSDN docs. There are some slight changes to the reg settings that I need to test out when I get home.

    Making an EWF enabled XP installation


    1) Install XP like you normally would, whether it's an nLite, XPLite, or regular install.

    2) Retrieve the EWF files: ewfmgr.exe, ewf.sys, and ewfntldr

    3) Place ewf.sys in \WINDOWS\System32\drivers

    4) Place ewfmgr.exe in \WINDOWS\System32

    5) Place ewfntldr on the root of your boot drive. Rename ntldr to ntldr_bak and rename ewfntldr to ntldr.

    6) Configure XP to minimize writes as much as possible. EWF basically creates a RAM drive where all changes are stored in RAM, so the more changes you

    make to your protected volume the more RAM it'll take.
    a) disable the paging file
    b) disable automatic disk defrag and autolayout:
    [HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Dfrg\BootOpt imizeFunction]
    "Enable"="N"

    [HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\Curr entVersion\OptimalLayout]
    "EnableAutoLayout"=dword:00000000
    c) disable Last Access timestamps:
    [HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Contro l\FileSystem]
    "NtfsDisableLastAccessUpdate"=dword:00000001
    d) disable Prefetch:
    [HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Contro l\Session Manager\Memory Management\PrefetchParameters]
    "EnablePrefetcher"=dword:00000000
    e) disable System Restore
    f) depending on your configuration you can also relocate your eventlogs to a non protected partition:

    http://msdn.microsoft.com/library/en...OfEventLog.asp
    g) same with your webbrowser temp files
    h) MSFT even recommends using a FAT filesystem if you don't require the security features of NTFS as this will improve EWF performance even more.

    7) Enter the following registry values into your registry:

    [HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Enum\R oot\LEGACY_EWF]
    "NextInstance"=dword:00000001

    [HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Enum\R oot\LEGACY_EWF\0000]
    "Service"="EWF"
    "Legacy"=dword:00000001
    "ConfigFlags"=dword:00000020
    "Class"="LegacyDriver"
    "ClassGUID"="{8ECC055D-047F-11D1-A537-0000F8753ED1}"
    "DeviceDesc"="EWF"
    "Capabilities"=dword:00000000

    [HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Enum\R oot\LEGACY_EWF\0000\Control]
    "ActiveService"="EWF"

    [HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Servic es\ewf]
    "ErrorControl"=dword:00000001
    "Group"="System Bus Extender"
    "Start"=dword:00000000
    "Type"=dword:00000001

    *NOTE*: For the following key, ADD Ewf to the existing value which should be volsnap.
    [HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Contro l\Class\{71A27CDD-812A-11D0-BEC7-08002BE2092F}]
    "UpperFilters"="Ewf"

    [HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Servic es\ewf\Parameters\Protected\Volume0]
    "Type"=dword:00000001
    "ArcName"="multi(0)disk(0)rdisk(0)partition(1) "

    This last entry, ArcName, needs to match the partition you want to protect. If you want to protect more than one volume then just add another key named

    Volume1 with the appropriate entries.

    8) Reboot!! If you get a boot error then just boot up with Last known good configuration. That will probably kill all the registry entries you entered,

    but you probably forgot something so do it again and make sure the EWF files are in the right places.

    9) Once you boot up open up a CMD and run "ewfmgr n:" n being the drive letter of your protected volume. If it says it didn't find an EWF volume then you

    messed up, otherwise it should show info on your protected volume.

    10) If you need to make configuration changes to windows or install software then disable EWF by running "ewfmgr n: -commitanddisable -live" n being your

    protected drive. This will COMMIT any changes and DISABLE EWF immediately. Once it's done go ahead and do whatever you want, but BEFORE YOU REBOOT run

    "ewfmgr n: -enable" n being your protected drive so that EWF will be reenabled after you restart.

    11) Hibernation is possible on a volume protected by EWF, but first create an empty file on the root drive (where you installed the special ewfntldr)

    called resmany.dat. Just right-click and create textfile and rename it resmany.dat. That's it. Obviously you need to do this with EWF disabled. Once that

    is done reenable EWF and RESTART so that EWF can protect the volume again. THEN you can hibernate. This will allow you to ALWAYS resume from the same

    hibernation state. There is no need to hibernate every time you shutdown, unless you want to change the state. For a CarPC system you would obviously

    hibernate with your frontend running.

    12) You need to really think about what you're doing with an EWF system because you don't want to make tons of changes without disabling EWF, or

    disabling EWF and then forget to reenable it. Take into consideration configuration files that may change (such as a frontend saving its state... if it

    saves it on an EWF partition it'll be gone when you resume!!).

    13) This system will allow you to run a regular XP install from a CompactFlash disk. MSFT has some good information on booting from CF disks and

    deploying your OS to CF, even if they are marked as removable: http://msdn.microsoft.com/library/en...mpactFlash.asp

    Spend the time to read through MSDN XP Embedded docs!! There's lots of good info on there about EWF, but also on streamlining your system and improving

    boot speed.

    Let us know if you find anything new!!!

    S/F,
    Frito

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